Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2017	Feb. 15, 2018	Jun. 30, 2017
Document and Entity Information
Entity Registrant Name	KAR Auction Services, Inc.
Entity Central Index Key	0001395942
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 5,739,253,210
Entity Common Stock, Shares Outstanding		134,408,950
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY

Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended								12 Months Ended
Consolidated Statements of Income - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating revenues
ADESA Auction Services									$ 1,937.5	$ 1,765.3	$ 1,427.8
IAA Salvage Services									1,219.2	1,098.0	994.4
AFC									301.3	286.8	268.4
Total operating revenues	$ 890.4	$ 843.0	$ 858.0	$ 866.6	$ 813.7	$ 789.6	$ 788.5	$ 758.3	3,458.0	3,150.1	2,690.6
Operating expenses
Cost of services (exclusive of depreciation and amortization)	525.1	479.2	481.7	501.2	488.3	459.5	447.6	432.0	1,987.2	1,827.4	1,548.5
Selling, general and administrative	172.5	155.7	154.6	157.4	148.8	146.3	146.9	141.1	640.2	583.1	502.0
Depreciation and amortization	69.4	66.2	64.5	64.5	64.7	60.5	59.0	56.4	264.6	240.6	212.8
Total operating expenses	767.0	701.1	700.8	723.1	701.8	666.3	653.5	629.5	2,892.0	2,651.1	2,263.3
Operating profit	123.4	141.9	157.2	143.5	111.9	123.3	135.0	128.8	566.0	499.0	427.3
Interest expense	42.1	41.5	40.1	40.3	38.0	36.3	35.8	28.7	164.0	138.8	91.4
Other income, net	(0.2)	(0.1)	(1.5)	(0.1)	0.3	0.8	(0.3)	(1.3)	(1.9)	(0.5)	(4.6)
Loss on extinguishment of debt	0.0	0.0	27.5	0.0	1.4	0.0	0.0	4.0	27.5	5.4	0.0
Gain on previously held equity interest value	(21.6)	0.0	0.0	0.0					(21.6)	0.0	0.0
Income before income taxes	103.1	100.5	91.1	103.3	72.2	86.2	99.5	97.4	398.0	355.3	340.5
Income taxes	(69.7)	37.7	33.9	34.1	26.7	31.8	37.7	36.7	36.0	132.9	125.9
Net Income	$ 172.8	$ 62.8	$ 57.2	$ 69.2	$ 45.5	$ 54.4	$ 61.8	$ 60.7	$ 362.0	$ 222.4	$ 214.6
Net income per share
Basic (in dollars per share)	$ 1.28	$ 0.46	$ 0.42	$ 0.51	$ 0.33	$ 0.39	$ 0.45	$ 0.44	$ 2.66	$ 1.62	$ 1.53
Diluted (in dollars per share)	$ 1.27	$ 0.46	$ 0.41	$ 0.50	$ 0.33	$ 0.39	$ 0.44	$ 0.44	2.62	1.60	1.51
Dividends declared per common share (in dollars per share)									$ 1.31	$ 1.19	$ 1.08

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Income	$ 362.0	$ 222.4	$ 214.6
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss)	24.1	(9.1)	(38.5)
Unrealized loss on postretirement benefit obligation	0.0	0.0	(0.1)
Total other comprehensive income (loss), net of tax	24.1	(9.1)	(38.6)
Comprehensive income	$ 386.1	$ 213.3	$ 176.0

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 317.2	$ 201.8
Restricted cash	19.4	17.9
Trade receivables, net of allowances of $11.2 and $13.0	725.5	682.9
Finance receivables, net of allowances of $13.0 and $12.0	1,899.6	1,780.2
Other current assets	175.7	158.4
Total current assets	3,137.4	2,841.2
Other assets
Goodwill	2,191.7	2,057.0
Customer relationships, net of accumulated amortization of $805.0 and $707.8	375.6	461.0
Other intangible assets, net of accumulated amortization of $338.7 and $301.6	350.6	320.1
Other assets	20.8	35.8
Total other assets	2,938.7	2,873.9
Property and equipment, net of accumulated depreciation of $755.1 and $655.6	908.2	842.5
Total assets	6,984.3	6,557.6
Current liabilities
Accounts payable	682.7	648.5
Accrued employee benefits and compensation expenses	104.4	100.7
Accrued interest	7.3	2.2
Other accrued expenses	171.5	149.4
Income taxes payable	5.8	5.0
Dividends payable	47.0	43.7
Obligations collateralized by finance receivables	1,358.1	1,280.3
Current maturities of long-term debt	12.4	105.2
Total current liabilities	2,389.2	2,335.0
Non-current liabilities
Long-term debt	2,667.7	2,365.1
Deferred income tax liabilities	192.7	291.7
Other liabilities	249.8	168.5
Total non-current liabilities	3,110.2	2,825.3
Commitments and contingencies (Note 16)
Stockholders' equity
Preferred stock, $0.01 par value: Authorized shares: 100,000,000; Issued shares: none	0.0	0.0
Common stock, $0.01 par value: Authorized shares: 400,000,000; Issued and outstanding shares: 134,315,118 (2017), 136,639,217 (2016)	1.3	1.4
Additional paid-in capital	1,251.8	1,371.1
Retained earnings	257.0	74.1
Accumulated other comprehensive loss	(25.2)	(49.3)
Total stockholders' equity	1,484.9	1,397.3
Total liabilities and stockholders' equity	$ 6,984.3	$ 6,557.6

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade receivables, allowances (in dollars)	$ 11.2	$ 13.0
Finance receivables, allowances (in dollars)	13.0	12.0
Customer relationships, accumulated amortization (in dollars)	805.0	707.8
Other intangible assets, accumulated amortization (in dollars)	338.7	301.6
Property and equipment, accumulated depreciation (in dollars)	$ 755.1	$ 655.6
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Authorized shares	100,000,000	100,000,000
Preferred stock, Issued shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	400,000,000	400,000,000
Common stock, Issued shares	134,315,118	136,639,217
Common stock, outstanding shares	134,315,118	136,639,217

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	(Accumulated Deficit)/Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2014	$ 1,547.1	$ 1.4	$ 1,593.7	$ (46.4)	$ (1.6)
Balance (in shares) at Dec. 31, 2014		141,300,000
Increase (Decrease) in Stockholders' Equity
Net Income	214.6			214.6
Other comprehensive income (loss)	(38.6)				(38.6)
Issuance of common stock under stock plans	22.7		22.7
Issuance of common stock under stock plans (in shares)		1,800,000
Stock-based compensation expense	11.7		11.7
Excess tax benefit from stock-based compensation	7.1		7.1
Repurchase and retirement of common stock	(227.6)		(227.6)
Repurchase and retirement of common stock (in shares)		(5,300,000)
Cash dividends declared to stockholders	(150.9)			(150.9)
Balance at Dec. 31, 2015	1,386.1	$ 1.4	1,407.6	17.3	(40.2)
Balance (in shares) at Dec. 31, 2015		137,800,000
Increase (Decrease) in Stockholders' Equity
Net Income	222.4			222.4
Other comprehensive income (loss)	(9.1)				(9.1)
Issuance of common stock under stock plans	17.1		17.1
Issuance of common stock under stock plans (in shares)		1,700,000
Surrender of RSUs for taxes	(10.5)		(10.5)
Surrender of RSUs for taxes (in shares)		(200,000)
Stock-based compensation expense	18.1		18.1
Excess tax benefit from stock-based compensation	17.2		17.2
Repurchase and retirement of common stock	(80.4)		(80.4)
Repurchase and retirement of common stock (in shares)		(2,700,000)
Dividends earned under stock plans	0.0		2.0	(2.0)
Cash dividends declared to stockholders	(163.6)			(163.6)
Balance at Dec. 31, 2016	$ 1,397.3	$ 1.4	1,371.1	74.1	(49.3)
Balance (in shares) at Dec. 31, 2016	136,639,217	136,600,000
Increase (Decrease) in Stockholders' Equity
Net Income	$ 362.0			362.0
Other comprehensive income (loss)	24.1				24.1
Issuance of common stock under stock plans	11.4		11.4
Issuance of common stock under stock plans (in shares)		1,100,000
Surrender of RSUs for taxes	(5.9)		(5.9)
Surrender of RSUs for taxes (in shares)		(100,000)
Stock-based compensation expense	24.2		24.2
Repurchase and retirement of common stock	(150.0)	$ (0.1)	(149.9)
Repurchase and retirement of common stock (in shares)		(3,300,000)
Dividends earned under stock plans	0.0		0.9	(0.9)
Cash dividends declared to stockholders	(178.2)			(178.2)
Balance at Dec. 31, 2017	$ 1,484.9	$ 1.3	$ 1,251.8	$ 257.0	$ (25.2)
Balance (in shares) at Dec. 31, 2017	134,315,118	134,300,000

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash dividends declared to stockholders (in dollars per share)	$ 1.31	$ 1.19	$ 1.08

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net Income	$ 362.0	$ 222.4	$ 214.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264.6	240.6	212.8
Provision for credit losses	38.5	40.5	18.8
Deferred income taxes	(93.5)	(4.2)	5.0
Amortization of debt issuance costs	10.4	8.8	7.2
Stock-based compensation	24.2	18.1	11.7
(Gain) loss on disposal of fixed assets	(0.8)	0.1	0.9
Loss on extinguishment of debt	27.5	5.4	0.0
Gain on previously held equity interest value	(21.6)	0.0	0.0
Other non-cash, net	8.1	9.5	2.0
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables and other assets	(57.4)	(194.7)	(127.0)
Accounts payable and accrued expenses	26.8	31.5	136.1
Net cash provided by operating activities	588.8	378.0	482.1
Investing activities
Net increase in finance receivables held for investment	(148.5)	(176.4)	(295.9)
Acquisition of businesses (net of cash acquired)	(73.3)	(432.1)	(118.1)
Purchases of property, equipment and computer software	(152.2)	(155.1)	(134.7)
Advance to equity method investee	(5.0)	0.0	0.0
Proceeds from the sale of property and equipment	0.7	0.0	0.3
(Increase) decrease in restricted cash	(1.5)	(1.7)	0.8
Net cash used by investing activities	(379.8)	(765.3)	(547.6)
Financing activities
Net increase in book overdrafts	8.3	17.7	10.7
Net (decrease) increase in borrowings from lines of credit	(80.5)	(59.5)	140.0
Net increase in obligations collateralized by finance receivables	65.0	96.8	349.8
Proceeds from long-term debt	2,717.0	1,336.5	0.0
Payments for debt issuance costs/amendments	(22.6)	(32.8)	(10.9)
Payments on long-term debt	(2,436.7)	(662.6)	(21.5)
Payments on capital leases	(30.1)	(25.6)	(20.5)
Payments of contingent consideration and deferred acquisition costs	(7.0)	(3.6)	(1.2)
Initial net investment for interest rate caps	(1.7)	0.0	(2.2)
Issuance of common stock under stock plans	11.4	17.1	22.7
Tax withholding payments for vested RSUs	(5.9)	(10.5)	0.0
Repurchase and retirement of common stock	(150.0)	(80.4)	(227.6)
Dividends paid to stockholders	(174.8)	(157.1)	(151.9)
Net cash (used by) provided by financing activities	(107.6)	436.0	87.4
Effect of exchange rate changes on cash	14.0	(1.9)	(19.8)
Net increase in cash and cash equivalents	115.4	46.8	2.1
Cash and cash equivalents at beginning of period	201.8	155.0	152.9
Cash and cash equivalents at end of period	317.2	201.8	155.0
Cash paid for interest	147.1	124.5	79.7
Cash paid for taxes, net of refunds	$ 126.0	$ 121.6	$ 129.9

Organization and Other Matters

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Other Matters

KAR Auction Services, Inc. was organized in the State of Delaware on November 9, 2006. The KAR group of companies is comprised of ADESA, Inc., Insurance Auto Auctions, Inc., Automotive Finance Corporation and additional business units.

Defined Terms

Unless otherwise indicated or unless the context otherwise requires, the following terms used herein shall have the following meanings:


•	"we," "us," "our" and "the Company" refer, collectively, to KAR Auction Services, Inc. and all of its subsidiaries;


•	"ADESA" or "ADESA Auctions" refer, collectively, to ADESA, Inc., a wholly-owned subsidiary of KAR Auction Services, and ADESA, Inc.'s subsidiaries, including Openlane, Inc. (together with Openlane, Inc.'s subsidiaries, "Openlane"), Nth Gen Software Inc. ("TradeRev") and ADESA Remarketing Limited (formerly known as GRS Remarketing Limited ("GRS" or "ADESA Remarketing Limited"));


•	"AFC" refers, collectively, to Automotive Finance Corporation, a wholly-owned subsidiary of ADESA, and Automotive Finance Corporation's subsidiaries and other related entities, including PWI Holdings, Inc.;


•	"Credit Agreement" refers to the Amended and Restated Credit Agreement, dated March 11, 2014, as amended on March 9, 2016 and May 31, 2017, among KAR Auction Services, as the borrower, the several banks and other financial institutions or entities from time to time parties thereto and the administrative agent;

•

"Credit Facility" refers to the three-year senior secured term loan B-1 facility ("Term Loan B-1"), the seven-year senior secured term loan B-2 facility ("Term Loan B-2"), the seven-year senior secured term loan B-3 facility ("Term Loan B-3"), the senior secured term loan B-4 facility due March 11, 2021 ("Term Loan B-4"), the senior secured term loan B-5 facility due March 9, 2023 ("Term Loan B-5"), the $350 million, senior secured revolving credit facility due March 9, 2021 (the "revolving credit facility"), the $300 million, five-year senior secured revolving credit facility (the "2016 revolving credit facility") and the $250 million, five-year senior secured revolving credit facility (the "2014/2015 revolving credit facility"), the terms of which are set forth in the Credit Agreement. Term Loan B-1 and the 2014/2015 revolving credit facility were extinguished in March 2016 with proceeds received from Term Loan B-3. Term Loan B-2, Term Loan B-3 and the 2016 revolving credit facility were repaid in May 2017 with proceeds from Term Loan B-4, Term Loan B-5 and the senior notes (defined below);


•	"IAA" refers, collectively, to Insurance Auto Auctions, Inc., a wholly-owned subsidiary of KAR Auction Services, and Insurance Auto Auctions, Inc.'s subsidiaries and other related entities, including HBC Vehicle Services Limited ("HBC");


•	"KAR Auction Services" refers to KAR Auction Services, Inc. and not to its subsidiaries; and


•	"Senior notes" refers to the 5.125% senior notes due 2025 ($950 million aggregate principal outstanding at December 31, 2017).

Business and Nature of Operations

As of December 31, 2017, we have a North American network of 75 ADESA whole car auction sites and 175 IAA salvage vehicle auction sites; in addition, we offer online auctions for both whole car and salvage vehicles. ADESA also includes TradeRev, an online automotive remarketing system where dealers can launch and participate in real-time vehicle auctions at any time and ADESA Remarketing Limited, an online whole car vehicle remarketing business in the United Kingdom. IAA also includes HBC Vehicle Services Limited, which operates from 11 locations in the United Kingdom. Our auctions facilitate the sale of used and salvage vehicles through physical, online or hybrid auctions, which permit Internet buyers to participate in physical auctions. ADESA and IAA are leading, national providers of wholesale and salvage vehicle auctions and related vehicle remarketing services for the automotive industry in North America. ADESA's online service offerings include customized private label solutions powered with software developed by its wholly-owned subsidiary, Openlane, that allow our institutional consignors (automobile manufacturers, captive finance companies and other institutions) to offer vehicles via the Internet prior to arrival at the physical auction. Remarketing services include a variety of activities designed to transfer used and salvage vehicles between sellers and buyers throughout the vehicle life cycle. ADESA and IAA facilitate the exchange of these vehicles through an auction marketplace, which aligns sellers and buyers. As an agent for customers, the Company generally does not take title to or ownership of vehicles sold at the auctions. Generally, fees are earned from the seller and buyer on each successful auction transaction in addition to fees earned for ancillary services.

ADESA has the second largest used vehicle auction network in North America, based upon the number of used vehicles sold through auctions annually, and also provides services such as inbound and outbound transportation logistics, reconditioning, vehicle inspection and certification, titling, administrative and collateral recovery services. ADESA is able to serve the diverse and multi-faceted needs of its customers through the wide range of services offered.

IAA is one of the leading providers of salvage vehicle auctions and related services. The salvage auctions facilitate the remarketing of damaged vehicles that are designated as total losses by insurance companies, recovered stolen vehicles for which an insurance settlement with the vehicle owner has already been made, purchased vehicles and older model vehicles donated to charity or sold by dealers in salvage auctions. The salvage auction business specializes in providing services such as inbound transportation logistics, inspections, evaluations, salvage recovery services, titling and settlement administrative services.

AFC is a leading provider of floorplan financing to independent used vehicle dealers and this financing is provided through 128 locations throughout the United States and Canada as of December 31, 2017. Floorplan financing supports independent used vehicle dealers in North America who purchase vehicles at ADESA, IAA, TradeRev, other used vehicle and salvage auctions and non-auction purchases. In addition to floorplan financing, AFC also provides independent used vehicle dealers with other related services and products, such as vehicle service contracts.

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include the accounts of KAR Auction Services and all of its majority owned subsidiaries. Significant intercompany transactions and balances have been eliminated.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates based in part on assumptions about current, and for some estimates, future economic and market conditions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the period. Although the current estimates contemplate current conditions and expected future changes, as appropriate, it is reasonably possible that future conditions could differ from these estimates, which could materially affect our results of operations and financial position. Among other effects, such changes could result in future impairments of goodwill, intangible assets and long-lived assets, incremental losses on finance receivables, additional allowances on accounts receivable and deferred tax assets, changes in litigation and other loss contingencies and changes in self insurance reserves.

Business Segments

Our operations are grouped into three operating segments: ADESA Auctions, IAA and AFC. The three operating segments also serve as our reportable business segments. Operations are measured through detailed budgeting and monitoring of contributions to consolidated income by each business segment.

Derivative Instruments and Hedging Activity

We recognize all derivative financial instruments in the consolidated financial statements at fair value in accordance with Accounting Standards Codification ("ASC") 815, Derivatives and Hedging. We currently use four interest rate caps to manage the variability of cash flows to be paid due to interest rate movements on our variable rate debt. The fair values of the interest rate derivatives are based on quoted market prices for similar instruments from commercial banks. The fair value of the derivatives is recorded in "Other assets" on the consolidated balance sheet. We have not designated any of the current interest rate caps as hedges for accounting purposes. Accordingly, changes in the fair value of the interest rate derivatives are recognized as "Interest expense" in the consolidated statement of income.

Foreign Currency Translation

The local currency is the functional currency for each of our foreign entities. Revenues and expenses denominated in foreign currencies are translated into U.S. dollars at average exchange rates in effect during the year. Assets and liabilities of foreign operations are translated using the exchange rates in effect at year end. Foreign currency transaction gains and losses are included in the consolidated statements of income within "Other income, net" and resulted in a gain of $0.8 million for the year ended December 31, 2017, a loss of $0.7 million for the year ended December 31, 2016 and a loss of $1.0 million for the year ended December 31, 2015. Adjustments arising from the translation of net assets located outside the U.S. (gains and losses) are shown as a component of "Accumulated other comprehensive income."

Cash Equivalents

All highly liquid investments with an original maturity of three months or less are considered to be cash equivalents. These investments are valued at cost, which approximates fair value.

Restricted Cash

AFC Funding Corporation, a wholly-owned, bankruptcy remote, consolidated, special purpose subsidiary of AFC, is required to maintain a minimum cash reserve of 1 percent of total receivables sold to the group of bank purchasers as security for the receivables sold. Automotive Finance Canada Inc. ("AFCI") is also required to maintain a minimum cash reserve of 1 percent of total receivables sold to its securitization facility. The amount of the cash reserve depends on circumstances which are set forth in the securitization agreements. AFC also maintains other cash reserves from time to time associated with its banking and vehicle service contract program insurance relationships.

Receivables

Trade receivables include the unremitted purchase price of vehicles purchased by third parties at the auctions, fees to be collected from those buyers and amounts due for services provided by us related to certain consigned vehicles in our possession. The amounts due with respect to the consigned vehicles are generally deducted from the sales proceeds upon the eventual auction or other disposition of the related vehicles.

Finance receivables include floorplan receivables created by financing dealer purchases of vehicles in exchange for a security interest in those vehicles and special purpose loans. Floorplan receivables become due at the earlier of the dealer subsequently selling the vehicle or a predetermined time period (generally 30 to 90 days). Special purpose loans relate to loans that are either line of credit loans or working capital loans that can be either secured or unsecured based on the facts and circumstances of the specific loans.

Due to the nature of our business, substantially all trade and finance receivables are due from vehicle dealers, salvage buyers, institutional sellers and insurance companies. We have possession of vehicles or vehicle titles collateralizing a significant portion of the trade and finance receivables.

Trade receivables and finance receivables are reported net of an allowance for doubtful accounts and credit losses. The allowances for doubtful accounts and credit losses are based on management's evaluation of the receivables portfolio under current conditions, the volume of the portfolio, overall portfolio credit quality, review of specific collection issues and such other factors which in management's judgment deserve recognition in estimating losses.

Other Current Assets

Other current assets consist of inventories, prepaid expenses, taxes receivable and other miscellaneous assets. The inventories, which consist of vehicles, supplies and parts, are accounted for on the specific identification method and are stated at the lower of cost or net realizable value.

Goodwill

Goodwill represents the excess of cost over fair value of identifiable net assets of businesses acquired. Goodwill is tested for impairment annually in the second quarter, or more frequently as impairment indicators arise. ASC 350, Intangibles—Goodwill and Other, permits an entity to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount before applying the two-step goodwill impairment model. If it is determined through the qualitative assessment that a reporting unit's fair value is more likely than not greater than its carrying value, the remaining impairment steps would be unnecessary. The qualitative assessment is optional, allowing companies to go directly to the quantitative assessment. The quantitative assessment for goodwill impairment is a two-step test. Under the first step, the fair value of each reporting unit is compared with its carrying value (including goodwill). If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and we must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit's goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation, in accordance with ASC 805, Business Combinations. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. Fair value of the reporting unit is determined using a discounted cash flow analysis. If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed.

Customer Relationships and Other Intangible Assets

Customer relationships are amortized on a straight-line basis over the life determined in the valuation of the particular acquisition. Other intangible assets generally consist of tradenames, computer software and non-compete agreements, which if amortized, are amortized using the straight-line method. Tradenames with indefinite lives are not amortized and tradenames that have been assigned a useful life are amortized over their estimated useful lives. Costs incurred related to software developed or obtained for internal use are capitalized during the application development stage of software development and amortized over their estimated useful lives. The non-compete agreements are amortized over the life of the agreements. The lives of other intangible assets are re-evaluated periodically when facts and circumstances indicate that revised estimates of useful lives may be warranted. Indefinite-lived tradenames are assessed for impairment, in accordance with ASC 350, annually in the second quarter or more frequently as impairment indicators arise. At the end of each assessment, we make a determination as to whether the tradenames still have an indefinite life.

Property and Equipment

Property and equipment are stated at historical cost less accumulated depreciation. Depreciation is computed using the straight-line method at rates intended to depreciate the costs of assets over their estimated useful lives. Upon retirement or sale of property and equipment, the cost of the disposed assets and related accumulated depreciation is removed from the accounts and any resulting gain or loss is credited or charged to selling, general and administrative expenses. Expenditures for normal repairs and maintenance are charged to expense as incurred. Additions and expenditures for improving or rebuilding existing assets that extend the useful life are capitalized. Leasehold improvements made either at the inception of the lease or during the lease term are amortized over the shorter of their economic lives or the lease term including any renewals that are reasonably assured.

Unamortized Debt Issuance Costs

Debt issuance costs reflect the expenditures incurred in conjunction with term loan debt, the revolving credit facility, the senior notes and the U.S. and Canadian receivables purchase agreements. The debt issuance costs are being amortized to interest expense using the effective interest method or the straight-line method, as applicable, over the lives of the related debt issues. Debt issuance costs are presented as a direct reduction from the carrying amount of the related debt liability.

Other Assets

Other assets consist of equity and cost method investments, below market leases, deposits, notes receivable and other long-term assets.

Long-Lived Assets

Management reviews our property and equipment, customer relationships and other intangible assets for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. The determination includes evaluation of factors such as current market value, future asset utilization, business climate, and future cash flows expected to result from the use of the related assets. If the carrying amount of a long-lived asset exceeds the total amount of the estimated undiscounted future cash flows from that asset, a loss is recognized in the period to the extent that the carrying amount exceeds the fair value of the asset. The impairment analysis is based on our current business strategy, expected growth rates and estimated future economic and regulatory conditions.

Accounts Payable

Accounts payable include amounts due sellers from the proceeds of the sale of their consigned vehicles less any fees, as well as outstanding checks to sellers and vendors. Book overdrafts, representing outstanding checks in excess of funds on deposit, are recorded in "Accounts payable" and amounted to $162.7 million and $154.4 million at December 31, 2017 and 2016, respectively.

Self Insurance Reserves

We self-insure our employee medical benefits, as well as a portion of our automobile, general liability and workers' compensation claims. We have insurance coverage that limits the exposure on individual claims. The cost of the insurance is expensed over the contract periods. We record an accrual for the claims expense related to our employee medical benefits, automobile, general liability and workers' compensation claims based upon the expected amount of all such claims. Accrued medical benefits and workers' compensation expenses are included in "Accrued employee benefits and compensation expenses" while accrued automobile and general liability expenses are included in "Other accrued expenses."

Environmental Liabilities

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated, based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress, or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in "Other accrued expenses" at undiscounted amounts and exclude claims for recoveries from insurance or other third parties.

Revenue Recognition

ADESA Auction Services

Revenues and the related costs are recognized when the services are performed. Auction fees from sellers and buyers are recognized upon the sale of the vehicle through the auction process. Most of the vehicles that are sold through auctions are consigned to ADESA by the seller and held at ADESA's facilities or third party locations. ADESA does not take title to these consigned vehicles and recognizes revenue when a service is performed as requested by the owner of the vehicle. ADESA does not record the gross selling price of the consigned vehicles sold at auction as revenue. Instead, ADESA records only its auction fees as revenue because it does not take title to the consigned vehicles and has no influence on the vehicle auction selling price agreed to by the seller and buyer at the auction. Our buyer fees and dealer seller fees are typically based on a tiered structure with fees increasing with the sale price of the vehicle, while institutional seller fees are typically fixed. Revenues from reconditioning, logistics, vehicle inspection and certification, titling, evaluation and salvage recovery services are generally recognized when the services are performed.

IAA Salvage Services

Revenues (including vehicle sales and fee income) are generally recognized at the date the vehicles are sold at auction. Most of the vehicles that are sold through auctions are consigned to IAA by the seller and held at IAA's facilities. IAA does not take title to these consigned vehicles and recognizes revenue when a service is performed as requested by the owner of the vehicle. IAA does not record the gross selling price of the consigned vehicles sold at auction as revenue. IAA seller revenues represent the combination of the inbound tow, processing, storage, titling, enhancing and auctioning of the vehicle and are recognized at the date the vehicles are sold at auction. Revenue not recognized at the date the vehicles are sold at auction includes annual buyer registration fees, which are recognized on a straight-line basis, and certain buyer-related fees, which are recognized when payment is received.

AFC

AFC's revenue is comprised of interest and fee income, provision for credit losses and other revenues associated with our finance receivables, as well as other service revenue. The following table summarizes the primary components of AFC's revenue:



	Year Ended December 31,
AFC Revenue (in millions)	2017			2016			2015
Interest and fee income	$	290.3		$	275.1		$	246.8
Other revenue	11.8			10.3			9.7
Provision for credit losses	(33.9		)	(30.7		)	(16.0		)
Other service revenue	33.1			32.1			27.9
	$	301.3		$	286.8		$	268.4

Interest and fee income

Interest on finance receivables is recognized based on the number of days the vehicle remains financed. AFC ceases recognition of interest on finance receivables when the loans become delinquent, which is generally 31 days past due. Dealers are also charged a fee to floorplan a vehicle ("floorplan fee"), to extend the terms of the receivable ("curtailment fee") and a document processing fee. AFC fee income including floorplan and curtailment fees is recognized over the life of the finance receivable.

Other revenue

Other revenue includes lot check fees, filing fees, lien holder payoff services and other related program fees, each of which are charged to and collected from AFC's customers.

Other service revenue

Other service revenue represents the revenue generated by Preferred Warranties, Inc. ("PWI"). PWI receives advance payments for vehicle service contracts and unearned revenue is deferred and recognized over the terms of the contracts utilizing a historical earnings curve. The average term of the contracts originated in 2017 was approximately 1.7 years and PWI had unearned revenue of $32.8 million at December 31, 2017.

Income Taxes

We file federal, state and foreign income tax returns in accordance with the applicable rules of each jurisdiction. We account for income taxes under the asset and liability method in accordance with ASC 740, Income Taxes. The provision for income taxes includes federal, foreign, state and local income taxes payable, as well as deferred taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable amounts in years in which those temporary differences are expected to be recovered or settled. If it is more likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized.

In accordance with ASC 740, we recognize the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

Net Income per Share

Basic net income per share is computed by dividing net income by the weighted average common shares outstanding during the year. Diluted net income per share represents net income divided by the sum of the weighted average common shares outstanding plus potential dilutive instruments related to our stock-based employee compensation program. The effect of stock options and restricted stock on net income per share-diluted is determined through the application of the treasury stock method, whereby net proceeds received by the Company based on assumed exercises are hypothetically used to repurchase our common stock at the average market price during the period. Stock options that would have an anti-dilutive effect on net income per diluted share and performance-based restricted stock units ("PRSUs") subject to performance conditions which have not yet been satisfied are excluded from the calculations.

Accounting for Stock-Based Compensation

The Company accounts for stock-based compensation under ASC 718, Compensation—Stock Compensation. We recognize all stock-based compensation as expense in the financial statements and that cost is measured as the fair value of the award at the grant date for equity-classified awards.

We adopted Accounting Standards Update ("ASU") 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, in the first quarter of 2017. As a result of the adoption, the Company elected to recognize the impact of forfeitures as they occur. In addition, the Company now recognizes excess tax benefits and tax deficiencies related to employee stock-based compensation within income tax expense. As a result, on a prospective basis, we recognized $6.4 million of excess tax benefits from stock-based compensation as a discrete item in our income tax expense for the year ended December 31, 2017. Historically, these amounts were recorded as additional paid-in capital. We have also retrospectively applied ASU 2016-09 to our consolidated statements of cash flows for the years ended December 31, 2016 and December 31, 2015, which resulted in a reclassification of excess tax benefits from stock-based compensation of $17.2 million and $7.1 million, respectively, from cash flows provided by financing activities to cash flows provided by operating activities.

New Accounting Standards

In May 2017, the Financial Accounting Standards Board ("FASB") issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The new guidance is expected to reduce diversity in practice and result in fewer changes to the terms of an award being accounted for as modifications. Changes that do not impact the fair value, vesting conditions or classification of an award will not require modification accounting. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2017-09 will have a material impact on the consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, which simplifies the test for goodwill impairment by eliminating Step 2 (implied fair value measurement). Instead goodwill impairment would be measured as the amount by which a reporting unit's carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill. The new guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2017-04 will have a material impact on the consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, which addresses diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2016-18 will have a material impact on the consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact the adoption of ASU 2016-15 will have on the consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The update changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. The new guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted beginning in annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We do not expect the adoption of ASU 2016-13 will have a material impact on the consolidated financial statements based on the short-term nature of AFC's loans.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which replaces existing lease guidance. The ASU is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use assets and corresponding lease liabilities on the balance sheet, with an exception for leases that meet the definition of a short-term lease. The new guidance will continue to classify leases as either finance or operating, with classification affecting the pattern of expense recognition in the statement of income. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted and the ASU is required to be applied with a modified retrospective approach to each prior reporting period presented with various optional practical expedients. The Company is currently evaluating the impact the adoption of ASU 2016-02 will have on the consolidated financial statements and anticipates that the new guidance will significantly impact its consolidated financial statements, as the Company has a significant number of leases. Our current minimum commitments under non-cancelable operating leases are disclosed in the "Contractual Obligations" section of "Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II, Item 7 and in Note 13. In addition, the recognition of these leases on our consolidated balance sheet would increase our net debt calculation which is included in the determination of our Consolidated Senior Secured Leverage Ratio. In this event, our Credit Agreement specifies that the covenant shall continue to be calculated as if the accounting standard had not occurred and that we could enter into negotiations to amend such provisions in the Credit Agreement so as to equitably reflect such changes with the desired result that the criteria for evaluating our financial condition would be the same after the change as if such change had not been made.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which superseded the revenue recognition requirements in ASC 605, Revenue Recognition. The new guidance provides clarification on the recognition of revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 also requires additional disclosures to help financial statement users better understand the nature, amount, timing and uncertainty of revenue that is recognized. In August 2015, the FASB issued ASU 2015-14 Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which defers the effective date of ASU 2014-09 by one year. In accordance with the agreed upon delay, the new guidance is effective for the first annual reporting period and interim periods beginning after December 15, 2017, and will require either retrospective application to each prior reporting period presented or retrospective application with the cumulative effect of initially applying the standard recognized at the date of adoption. The Company will use retrospective application with the cumulative effect as its transition method. The Company has evaluated the impact the adoption of ASU 2014-09 will have on the consolidated financial statements and has assessed its contracts with customers. The adoption of ASU 2014-09 will not result in any material adjustments and it will not have a material impact on the consolidated financial statements.

Acquisitions and Equity Method Investments	12 Months Ended
Acquisitions and Equity Method Investments	Dec. 31, 2017
Acquisitions and Equity Method Investments [Abstract]
Acquisitions and Equity Method Investments	Acquisitions and Equity Method Investment 2017 Acquisitions In April 2017, the Company purchased all of the stock of CarCo Technologies, Inc. (“DRIVIN”). DRIVIN aggregates automotive retail, pricing, registration and other market and economic data from a variety of public and proprietary sources. The insights generated from that data are deployed through predictive pricing, inventory management and vehicle matching tools that help customers buy, sell and source vehicles. In May 2017, the Company acquired Dependable Auto Shippers ("DAS"). DAS provides vehicle transportation services for corporate and personal vehicle transportation needs. In October 2017, the Company acquired the remaining 50% interest in Nth Gen Software Inc. ("TradeRev"). TradeRev brings mobile and digital technology to the Company’s portfolio of whole car and salvage auctions, floorplan financing solutions, and other ancillary and related services. The Company plans to further integrate those capabilities into TradeRev to expand its digital business and strengthen its share in the dealer-to-dealer market. The Company entered into operating lease obligations related to various facilities through 2028. Initial annual lease payments for the various facilities are approximately $1.8 million per year. In December 2017, the Company acquired POIS, Inc. POIS provides loan payoff and lien release technology with a focus on helping insurance companies settle liens faster to improve cycle time/inventory turns. Certain of the purchase agreements included contingent payments related to vehicle volumes subsequent to the purchase date. The purchased assets included accounts receivable, inventory, customer relationships, tradenames, software and other intangible assets. Financial results for each acquisition have been included in our consolidated financial statements from the date of acquisition. The aggregate purchase price for the businesses acquired in 2017, net of cash acquired, was approximately $103.9 million, which included deferred payments with a fair value of $6.6 million and estimated contingent payments with a fair value of $24.0 million. The maximum amount of undiscounted contingent payments related to these acquisitions could approximate $60.0 million. The purchase price for the acquired businesses was allocated to acquired assets and liabilities based upon fair values, including $29.4 million to intangible assets, representing the fair value of acquired customer relationships of $3.1 million, software of $24.0 million and tradenames of $2.3 million, which are being amortized over their expected useful lives. The acquisitions resulted in aggregate goodwill of $130.7 million. The goodwill is recorded in the ADESA Auctions reportable segment. The financial impact of these acquisitions, including pro forma financial results, was immaterial to the Company’s consolidated results for the year ended December 31, 2017. 2016 Acquisitions In February 2016, ADESA signed a definitive agreement to acquire auctions owned by the Brasher family. In April 2016, ADESA completed the acquisition of Brasher's eight auctions, which strengthens ADESA's western U.S. footprint. In 2015, Brasher's had revenues of approximately $140 million. We entered into operating lease obligations related to various facilities through 2036. Initial annual lease payments for the various facilities are approximately $5 million per year. In March 2016, ADESA signed a definitive agreement to acquire Sanford Auto Dealers Exchange ("SADE"). In May 2016, ADESA completed the acquisition of SADE, which expands ADESA's geographic footprint in central Florida. In June 2016, the Company acquired GRS, a subsidiary of Greenhous Group Limited. GRS is an established online vehicle remarketing business in the U.K. The acquisition complements the Company's wide range of vehicle remarketing services and provides the opportunity to offer our full range of services in the U.K. In November 2016, ADESA completed the acquisition of Flint Auto Auction, a whole car auction facility in Flint, Michigan. This acquisition expands ADESA's geographic footprint in the Midwest. Certain of the purchase agreements included contingent payments related to vehicle volumes subsequent to the purchase date. The purchased assets included land, buildings, accounts receivable, operating equipment, customer relationships, tradenames, software, inventory and other intangible assets. Financial results for each acquisition have been included in our consolidated financial statements from the date of acquisition. The aggregate purchase price for the businesses acquired in 2016, net of cash acquired, was approximately $433.4 million, which included estimated contingent payments with a fair value of $1.3 million. The maximum amount of undiscounted contingent payments related to these acquisitions could approximate $1.5 million. The purchase price for the acquired businesses was allocated to acquired assets and liabilities based upon fair values, including $136.8 million to intangible assets, representing the fair value of acquired customer relationships of $129.8 million, software of $4.9 million, tradenames of $1.8 million and non-competes of $0.3 million, which are being amortized over their expected useful lives. The acquisitions resulted in aggregate goodwill of $269.6 million. The goodwill is recorded in the ADESA Auctions and AFC reportable segments. The financial impact of these acquisitions, including pro forma financial results, was immaterial to the Company’s consolidated results for the year ended December 31, 2016. Equity Method Investment For the first nine months of 2017, ADESA held a 50% interest in TradeRev. In addition, ADESA also had a joint marketing agreement with TradeRev to assist in expanding its footprint in the dealer-to-dealer online space in the U.S. and Canadian markets. Prior to the acquisition in October 2017, the Company accounted for TradeRev as an equity method investment because we had the ability to exercise significant influence over operating and financial policies but did not have a controlling financial interest. At the date of acquisition, the carrying amount of the investment was $18.4 million. Upon acquisition, our previously held interest in TradeRev was re-measured at fair value, resulting in a non-cash gain of $21.6 million. The fair value of our previously held interest in TradeRev was developed in consultation with independent valuation specialists who used a discounted cash flow methodology. The gain has been recognized as "Gain on previously held equity interest value" in the consolidated statement of income for the year ended December 31, 2017. ASC 323, Investments - Equity Method and Joint Ventures, specifies that to the extent there is a basis difference between the cost and the underlying equity in the net assets of an equity investment, such difference is required to be allocated between tangible and intangible assets. At the date of the acquisition of the first 50% interest, the carrying amount of the investment in TradeRev was greater than the Company’s equity in the underlying assets of TradeRev by approximately $21.8 million as a result of the difference in the carrying amounts of intangible assets. The difference attributable to amortizable intangible assets was approximately $4.8 million at the time of the equity investment, which was amortized on a straight-line basis over the expected useful lives of the intangible assets, which range from 6 to 14 years. The intangible assets are not reflected on the balance sheet of KAR Auction Services for the year ended December 31, 2016. The Company’s share in the net losses of TradeRev in 2017, through the date of acquisition, was $4.4 million and the Company's share in the net losses of TradeRev for fiscal years 2016 and 2015 was $3.8 million and $0.8 million, respectively. This amount was recorded to “Other income, net” in the consolidated statements of income. In the first quarter of 2017, TradeRev signed a promissory note with ADESA. The promissory note created a line of credit for term loans up to $15 million, with a minimum of $5 million to be drawn at a time. Until the acquisition of TradeRev, there was $5 million outstanding on the promissory note.

Stock and Stock-Based Compensation Plans

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock and Stock-Based Compensation Plans

Our stock-based compensation expense has included expense associated with KAR Auction Services, Inc. PRSUs, service-based restricted stock units ("RSUs"), service options and exit options. We have classified the KAR Auction Services, Inc. PRSUs, RSUs, service options and exit options as equity awards.

The compensation cost that was charged against income for all stock-based compensation plans was $24.2 million, $18.1 million and $11.7 million for the years ended December 31, 2017, 2016 and 2015, respectively, and the total income tax benefit recognized in the consolidated statement of income for options, PRSUs and RSUs was approximately $6.1 million, $6.9 million and $4.4 million for the years ended December 31, 2017, 2016 and 2015, respectively. We did not capitalize any stock-based compensation cost in the years ended December 31, 2017, 2016 or 2015.

The following table summarizes our stock-based compensation expense by type of award (in millions):



	Year Ended December 31,
	2017		2016		2015
PRSUs	$	13.2	$	10.3	$	6.1
RSUs	9.5		5.9		2.5
Service options	1.5		1.9		3.1
Total stock-based compensation expense	$	24.2	$	18.1	$	11.7

KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan - PRSUs, RSUs, Service Options and Exit Options

We adopted the KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan ("Omnibus Plan") in December 2009. The Omnibus Plan is intended to provide equity or cash-based awards to our employees. The maximum number of shares that may be issued pursuant to awards under the Omnibus Plan is 12.5 million. The Omnibus Plan provides for the grant of options, restricted stock, stock appreciation rights, other stock-based awards and cash-based awards. The PRSU and RSU grants described below were made pursuant to the Company's Policy on Granting Equity Awards.

PRSUs

In 2017, we granted a target amount of approximately 0.2 million PRSUs to certain executive officers and management of the Company. The PRSUs generally vest if and to the extent that the Company's three-year operating adjusted earnings per share attains certain specified goals. The weighted average grant date fair value of the PRSUs was $44.64 per share, which was determined using the closing price of the Company's common stock on the dates of grant.

In 2016, we granted a target amount of approximately 0.3 million PRSUs to certain executive officers and management of the Company. The PRSUs vest if and to the extent that the Company's three-year operating adjusted earnings per share attains certain specified goals. The weighted average grant date fair value of the PRSUs was $34.94 per share, which was determined using the closing price of the Company's common stock on the dates of grant.

In 2015, we granted a target amount of approximately 0.2 million PRSUs to certain executive officers and management of the Company. The PRSUs vest to the extent that the Company's three-year adjusted earnings per share attains certain specified goals. The weighted average grant date fair value of the PRSUs was $37.03 per share, which was determined using the closing price of the Company's common stock on the dates of grant.

In the first quarter of 2014, we granted a target amount of approximately 0.1 million PRSUs to certain executive officers of the Company. Half of the PRSUs vested three years from the grant date to the extent that the Company's total shareholder return relative to that of companies within the S&P 500 Index exceeded certain levels over the same period. The other half of the PRSUs vested to the extent that the Company's three-year adjusted earnings per share attained certain specified goals. The grant date fair value of the PRSUs tied to total shareholder return was $36.54 per share and was developed in consultation with independent valuation specialists who used a Monte-Carlo simulation using a geometric Brownian motion based upon a risk-neutral framework. Key assumptions in the valuation included the fair market value of our common stock on the date of grant, the expected volatility of our common stock over the expected term of the award and the risk-free interest rate for the expected term of the award. The grant date fair value of the PRSUs tied to adjusted earnings per share was $30.89 per share, which was the closing price of the Company's common stock on the date of grant.

As of December 31, 2017, an estimated $9.6 million of unrecognized compensation expense related to nonvested PRSUs is expected to be recognized over a weighted average term of approximately 1.7 years. Dividend equivalents accrue on the PRSUs and are subject to the same vesting and forfeiture terms as the PRSUs.

RSUs

In 2017, 2016 and 2015, approximately 0.3 million, 0.3 million and 0.3 million, respectively, RSUs were granted to certain executive officers and management of the Company. The RSUs are contingent upon continued employment and generally vest in three equal annual installments. The fair value of RSUs is the value of the Company's common stock at the date of grant and the weighted average grant date fair value of the RSUs was $44.03 per share, $34.91 per share and $37.04 per share in 2017, 2016 and 2015, respectively. Dividend equivalents accrue on the RSUs and are subject to the same vesting and forfeiture terms as the RSUs.

The following table summarizes RSU activity, excluding dividend equivalents, under the Omnibus Plan for the year ended December 31, 2017:



Restricted Stock Units	Number		Weighted Average Grant Date Fair Value
RSUs at January 1, 2017	417,712		$	35.67
Granted	299,955		44.03
Vested	(163,221	)	35.92
Forfeited	(23,228	)	38.99
RSUs at December 31, 2017	531,218		$	40.18

As of December 31, 2017, there was approximately $12.3 million of unrecognized compensation expense related to nonvested RSUs which is expected to be recognized over a weighted average term of 1.9 years.

Service Options

In 2014, we granted approximately 0.9 million service options, with a weighted average exercise price of $30.06 per share under the Omnibus Plan. The service options have a ten year life and generally vest in four equal annual installments, commencing on the first anniversary of the respective grant dates.

Exit Options

The outstanding exit options granted in 2010 under the Omnibus Plan have a ten year life and are fully vested and exercisable.

KAR Auction Services, Inc. Stock Incentive Plan - Service Options and Exit Options

The Company adopted the KAR Auction Services, Inc. Stock Incentive Plan (the "Plan") in May 2007. The Plan was intended to provide equity incentive benefits to the Company's employees. The maximum number of shares that were to be issued pursuant to awards under the Plan was approximately 7.9 million. The Plan provided for the grant of incentive stock options and non-qualified stock options and restricted stock. Awards granted since the adoption of the Plan were non-qualified stock options, and no further grants will be awarded under the Plan.

The Plan provided two types of stock options: service-related options and performance-related exit options. All of the outstanding service options and exit options granted under the Plan occurred prior to 2010 and have a ten year life. In addition, all of the service options and exit options outstanding under the Plan are fully vested and exercisable.

Service Options Summary

The following table summarizes service option activity under the Omnibus Plan and the Plan for the year ended December 31, 2017:



Service Options	Number		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	1,687,925		$	22.59
Granted	—		N/A
Exercised	(303,062	)	18.31
Forfeited	(5,000	)	25.80
Canceled	(274	)	10.00
Outstanding at December 31, 2017	1,379,589		$	23.54	5.1 years	$	37.2
Exercisable at December 31, 2017	1,095,427		$	21.87	4.8 years	$	31.4

The intrinsic value presented in the table above represents the amount by which the market value of the underlying stock exceeds the exercise price of the option at December 31, 2017. The intrinsic value changes continuously based on the fair value of our stock. The market value is based on KAR Auction Services' closing stock price of $50.51 on December 31, 2017. The total intrinsic value of service options exercised during the years ended December 31, 2017, 2016 and 2015 was $8.1 million, $9.6 million and $11.0 million, respectively. The fair value of all vested and exercisable service options at December 31, 2017 and 2016 was $55.3 million and $49.0 million, respectively.

As of December 31, 2017, there was approximately $0.3 million of unrecognized compensation expense related to nonvested service options which is expected to be recognized over a weighted average term of 0.2 years.

Exit Options Summary

The following table summarizes exit option activity under the Omnibus Plan and the Plan for the year ended December 31, 2017:



Exit Options	Number		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	991,276		$	11.90
Granted	—		N/A
Exercised	(444,877	)	11.23
Forfeited	—		N/A
Canceled	(823	)	10.00
Outstanding at December 31, 2017	545,576		$	12.46	1.8 years	$	20.8
Exercisable at December 31, 2017	545,576		$	12.46	1.8 years	$	20.8

The intrinsic value presented in the table above represents the amount by which the market value of the underlying stock exceeds the exercise price of the option at December 31, 2017. The intrinsic value changes continuously based on the fair value of our stock. The market value is based on KAR Auction Services' closing stock price of $50.51 on December 31, 2017. The total intrinsic value of exit options exercised during the years ended December 31, 2017, 2016 and 2015 was $14.7 million, $23.8 million and $35.9 million, respectively. The fair value of all vested and exercisable exit options at December 31, 2017 and 2016 was $27.6 million and $42.2 million, respectively. All compensation expense related to the exit options was recognized prior to 2015.

KAR Auction Services, Inc. Employee Stock Purchase Plan

A maximum of 1,000,000 shares of our common stock have been reserved for issuance under the KAR Auction Services, Inc. Employee Stock Purchase Plan ("ESPP"). At December 31, 2017, 465,020 shares remain available for purchase under the ESPP. The ESPP provides for one month offering periods with a 15% discount from the fair market value of a share on the date of purchase. In accordance with ASC 718, Compensation—Stock Compensation, the entire 15% purchase discount is recorded as compensation expense. A participant's combined payroll deductions and cash payments in the ESPP may not exceed $25,000 per year.

Share Repurchase Programs

In October 2016, the board of directors authorized a repurchase of up to $500 million of the Company’s outstanding common stock, par value $0.01 per share, through October 26, 2019. Repurchases may be made in the open market or through privately negotiated transactions, in accordance with applicable securities laws and regulations, including pursuant to repurchase plans designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The timing and amount of any repurchases is subject to market and other conditions. In 2017 and 2016 we repurchased and retired 3,279,089 and 1,931,200 shares of common stock, respectively, in the open market at a weighted average price of $45.74 and $41.61 per share, respectively, under the October 2016 authorization.

In October 2014, the board of directors authorized a repurchase of up to $300 million of the Company’s outstanding common stock, par value $0.01 per share, through October 28, 2016. Repurchases were made in the open market or through privately negotiated transactions, in accordance with applicable securities laws and regulations, including pursuant to repurchase plans designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The timing and amount of any repurchases was subject to market and other conditions. In 2015 we repurchased and retired a total of 744,900 shares of common stock in the open market at a weighted average price of $37.04 per share. In 2016, we made no repurchases of common stock in the open market under the October 2014 authorization.

In August 2015, as part of the authorized program to repurchase common stock noted above, the Company entered into an accelerated share repurchase agreement under which it paid $200 million for an initial delivery of approximately 4.6 million shares of its common stock. The initial delivery of shares represented 90% of the shares anticipated to be repurchased based on current market prices at that time. The initial delivery of shares also resulted in an immediate reduction in the number of shares used to calculate the weighted average common shares outstanding for basic and diluted net income per share. The Company settled the accelerated share repurchase agreement in January 2016 and received approximately 0.8 million additional shares of its common stock based on an adjusted volume weighted average price of its stock over the period. In total, 5,413,274 shares were repurchased under the accelerated share repurchase agreement at an average repurchase price of $36.95 per share.

Net Income Per Share

12 Months Ended

Dec. 31, 2017

Earnings Per Share, Basic and Diluted [Abstract]

Net Income Per Share

The following table sets forth the computation of net income per share (in millions except per share amounts):



	Year Ended December 31,
	2017		2016		2015
Net income	$	362.0	$	222.4	$	214.6
Weighted average common shares outstanding	136.3		137.6		140.1
Effect of dilutive stock options and restricted stock awards	1.7		1.5		2.2
Weighted average common shares outstanding and potential common shares	138.0		139.1		142.3
Net income per share
Basic	$	2.66	$	1.62	$	1.53
Diluted	$	2.62	$	1.60	$	1.51

Basic net income per share was calculated by dividing net income by the weighted average number of outstanding common shares for the period. Diluted net income per share was calculated consistent with basic net income per share including the effect of dilutive unissued common shares related to our stock-based employee compensation program. The effect of stock options and restricted stock on net income per share-diluted is determined through the application of the treasury stock method, whereby net proceeds received by the Company based on assumed exercises are hypothetically used to repurchase our common stock at the average market price during the period. Stock options that would have an anti-dilutive effect on net income per diluted share and PRSUs subject to performance conditions which have not yet been satisfied are excluded from the calculations. No options were excluded from the calculation of diluted net income per share for the years ended December 31, 2017, 2016 and 2015 respectively. In addition, approximately 0.5 million, 0.5 million and 0.3 million PRSUs were excluded from the calculation of diluted net income per share for the years ended December 31, 2017, 2016 and 2015, respectively. Total options outstanding at December 31, 2017, 2016 and 2015 were 1.9 million, 2.7 million and 4.0 million, respectively.

Allowance for Credit Losses and Doubtful Accounts

12 Months Ended

Dec. 31, 2017

Allowance for Credit Losses and Doubtful Accounts [Abstract]

Allowance for Credit Losses and Doubtful Accounts

The following is a summary of the changes in the allowance for credit losses related to finance receivables (in millions):



	Year Ended December 31,
	2017			2016			2015
Allowance for Credit Losses
Balance at beginning of period	$	12.0		$	9.0		$	8.0
Provision for credit losses	33.9			30.7			16.0
Recoveries	5.3			4.2			4.1
Less charge-offs	(38.2		)	(31.9		)	(19.1		)
Balance at end of period	$	13.0		$	12.0		$	9.0

AFC's allowance for credit losses includes estimated losses for finance receivables currently held on the balance sheet of AFC and its subsidiaries.

The following is a summary of changes in the allowance for doubtful accounts related to trade receivables (in millions):



	Year Ended December 31,
	2017			2016			2015
Allowance for Doubtful Accounts
Balance at beginning of period	$	13.0		$	6.6		$	6.3
Provision for credit losses	4.6			9.8			2.8
Less net charge-offs	(6.4		)	(3.4		)	(2.5		)
Balance at end of period	$	11.2		$	13.0		$	6.6

Recoveries of trade receivables were netted with charge-offs, as they were not material. Changes in the Canadian exchange rate did not have a material effect on the allowance for doubtful accounts.

Finance Receivables and Obligations Collateralized by Finance Receivables

12 Months Ended

Dec. 31, 2017

Notes, Loans and Financing Receivable, Net, Current [Abstract]

Finance Receivables and Obligations Collateralized by Finance Receivables

AFC sells the majority of its U.S. dollar denominated finance receivables on a revolving basis and without recourse to a wholly-owned, bankruptcy remote, consolidated, special purpose subsidiary ("AFC Funding Corporation"), established for the purpose of purchasing AFC's finance receivables. A securitization agreement allows for the revolving sale by AFC Funding Corporation to a group of bank purchasers of undivided interests in certain finance receivables subject to committed liquidity. AFC Funding Corporation had committed liquidity of $1.50 billion for U.S. finance receivables at December 31, 2017.

In December 2016, AFC and AFC Funding Corporation entered into the Seventh Amended and Restated Receivables Purchase Agreement (the "Receivables Purchase Agreement"). The Receivables Purchase Agreement increased AFC Funding's U.S. committed liquidity from $1.25 billion to $1.50 billion and extended the facility's maturity date from June 29, 2018 to January 31, 2020. In addition, the definition of eligible receivables was expanded and the tangible net worth requirement increased. We capitalized approximately $12.7 million of costs in connection with the Receivables Purchase Agreement. In addition, we recorded a $1.4 million pretax charge resulting from the write-off of a portion of the unamortized securitization issuance costs. In March 2016, we also capitalized approximately $0.8 million of costs in connection with an amendment to the agreement.

We also have an agreement for the securitization of AFCI's receivables. AFCI's committed facility is provided through a third party conduit (separate from the U.S. facility) and was C$125 million at December 31, 2017. In December 2016, AFCI entered into the Fourth Amended and Restated Receivables Purchase Agreement (the "Canadian Receivables Purchase Agreement"). The Canadian Receivables Purchase Agreement extended the facility's maturity date from June 29, 2018 to January 31, 2020. We capitalized approximately $0.7 million of costs in connection with the Canadian Receivables Purchase Agreement. The receivables sold pursuant to both the U.S. and Canadian securitization agreements are accounted for as secured borrowings.

The following tables present quantitative information about delinquencies, credit losses less recoveries ("net credit losses") and components of securitized financial assets and other related assets managed. For purposes of this illustration, delinquent receivables are defined as receivables 31 days or more past due.



	December 31, 2017				Net Credit Losses During 2017
	Total Amount of:
(in millions)	Receivables		Receivables Delinquent
Floorplan receivables	$	1,901.1	$	12.1	$	32.9
Other loans	11.5		—		—
Total receivables managed	$	1,912.6	$	12.1	$	32.9



	December 31, 2016				Net Credit Losses During 2016
	Total Amount of:
(in millions)	Receivables		Receivables Delinquent
Floorplan receivables	$	1,781.1	$	12.0	$	27.7
Other loans	11.1		—		—
Total receivables managed	$	1,792.2	$	12.0	$	27.7

AFC's allowance for losses was $13.0 million and $12.0 million at December 31, 2017 and 2016, respectively.

As of December 31, 2017 and 2016, $1,893.2 million and $1,774.8 million, respectively, of finance receivables and a cash reserve of 1 percent of the obligations collateralized by finance receivables served as security for the obligations collateralized by finance receivables. Obligations collateralized by finance receivables consisted of the following:



	December 31, 2017			December 31, 2016
Obligations collateralized by finance receivables, gross	$	1,371.4		$	1,300.0
Unamortized securitization issuance costs	(13.3		)	(19.7		)
Obligations collateralized by finance receivables	$	1,358.1		$	1,280.3

Proceeds from the revolving sale of receivables to the bank facilities are used to fund new loans to customers. AFC, AFC Funding Corporation and AFCI must maintain certain financial covenants including, among others, limits on the amount of debt AFC and AFCI can incur, minimum levels of tangible net worth, and other covenants tied to the performance of the finance receivables portfolio. The securitization agreements also incorporate the financial covenants of our Credit Facility. At December 31, 2017, we were in compliance with the covenants in the securitization agreements.

Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill consisted of the following (in millions):



	ADESA Auctions			IAA			AFC		Total
Balance at December 31, 2015	$	1,039.4		$	537.5		$	219.0	$	1,795.9
Increase for acquisition activity	224.1			0.8			44.7		269.6
Other	(6.6		)	(1.9		)	—		(8.5		)
Balance at December 31, 2016	$	1,256.9		$	536.4		$	263.7	$	2,057.0
Increase for acquisition activity	130.7			—			—		130.7
Other	2.8			1.2			—		4.0
Balance at December 31, 2017	$	1,390.4		$	537.6		$	263.7	$	2,191.7

Goodwill represents the excess cost over fair value of identifiable net assets of businesses acquired. Goodwill increased in 2017 and 2016 primarily as a result of acquisitions. A portion of the goodwill resulting from the businesses acquired in 2017 and 2016 is expected to be deductible for tax purposes. The "other" category includes the impact of fluctuations in exchange rates.

A summary of customer relationships is as follows (in millions):



		December 31, 2017							December 31, 2016
	Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Carrying Value		Gross Carrying Amount		Accumulated Amortization			Carrying Value
Customer relationships	5 - 19	$	1,180.6	$	(805.0	)	$	375.6	$	1,168.8	$	(707.8	)	$	461.0

The increase in customer relationships in 2017 was primarily related to customer relationships acquired, partially offset by the amortization of existing customer relationships, as well as changes in the Canadian exchange rate.

A summary of other intangibles is as follows (in millions):



		December 31, 2017							December 31, 2016
	Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Carrying Value		Gross Carrying Amount		Accumulated Amortization			Carrying Value
Tradenames	2 - Indefinite	$	203.4	$	(8.6	)	$	194.8	$	201.1	$	(6.9	)	$	194.2
Computer software & technology	3 - 13	470.9		(315.6		)	155.3		404.8		(279.7		)	125.1
Covenants not to compete	1 - 5	15.0		(14.5		)	0.5		15.8		(15.0		)	0.8
Total		$	689.3	$	(338.7	)	$	350.6	$	621.7	$	(301.6	)	$	320.1

Other intangibles increased in 2017 primarily as a result of computer software additions and acquisitions, partially offset by the amortization of existing intangibles. The carrying amount of tradenames with an indefinite life was approximately $187.5 million at December 31, 2017 and 2016.

Amortization expense for customer relationships and other intangibles was $162.6 million, $151.0 million and $138.0 million for the years ended December 31, 2017, 2016 and 2015, respectively. Estimated amortization expense on existing intangible assets for the next five years is $138.6 million for 2018, $110.5 million for 2019, $75.1 million for 2020, $44.9 million for 2021 and $36.7 million for 2022.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment consisted of the following (in millions):



	Useful Lives (in years)	December 31,
	Useful Lives (in years)	2017			2016
Land		$	270.9		$	266.4
Buildings	5 - 40	249.5			244.7
Land improvements	5 - 20	173.8			167.7
Building and leasehold improvements	3 - 33	436.8			384.5
Furniture, fixtures and equipment	1 - 10	456.4			388.6
Vehicles	3 - 10	22.3			19.1
Construction in progress		53.6			27.1
		1,663.3			1,498.1
Accumulated depreciation		(755.1		)	(655.6		)
Property and equipment, net		$	908.2		$	842.5

Depreciation expense for the years ended December 31, 2017, 2016 and 2015 was $102.0 million, $89.6 million and $74.8 million, respectively.

We have acquired furniture, fixtures and equipment by undertaking capital lease obligations. Assets held under the capital leases are depreciated in a manner consistent with our depreciation policy for owned assets. The assets included above that are held under capital leases are summarized below (in millions):



	December 31,
Classes of Property	2017			2016
Furniture, fixtures and equipment	$	180.0		$	149.2
Accumulated depreciation	(119.2		)	(94.2		)
Capital lease assets	$	60.8		$	55.0

Self Insurance and Retained Loss Reserves

12 Months Ended

Dec. 31, 2017

Self Insurance and Retained Loss Reserves [Abstract]

Self Insurance and Retained Loss Reserves

We self-insure our employee medical benefits, as well as a portion of our automobile, general liability and workers' compensation claims. We have insurance coverage that limits the exposure on individual claims. We also had insurance coverage that limited the total exposure to overall automobile, general liability and workers' compensation claims in 2016 and 2015. The cost of the insurance is expensed over the contract periods. Utilizing historical claims experience, we record an accrual for the claims based upon the expected amount of all such claims, which includes the cost of claims that have been incurred but not reported. Accrued medical benefits and workers' compensation expenses are included in "Accrued employee benefits and compensation expenses" while accrued automobile and general liability expenses are included in "Other accrued expenses."

The following is a summary of the changes in the reserves for self-insurance and the retained losses (in millions):



	Year Ended December 31,
	2017			2016			2015
Balance at beginning of period	$	43.1		$	36.1		$	33.3
Net payments	(85.2		)	(76.5		)	(66.3		)
Expense	87.4			83.5			69.1
Balance at end of period	$	45.3		$	43.1		$	36.1

Individual stop-loss coverage for medical benefits was $0.5 million in 2017 and 2016. There was no aggregate policy limit for medical benefits for the Company in either year. The retention for automobile and general liability claims was $1.0 million per occurrence and the retention for workers' compensation claims was $0.5 million per occurrence with a $1.0 million corridor deductible in the 2017 and 2016 policy years. Once the $1.0 million corridor deductible is met for workers' compensation claims, the deductible reverts back to $0.5 million per occurrence. There was no aggregate policy limit for the combined automobile, general liability and workers' compensation program for the 2017 policy year. The aggregate policy limits for the combined automobile, general liability and workers' compensation program was $30.4 million for the 2016 policy year.

Long-Term Debt

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Long-Term Debt

Long-term debt consisted of the following (in millions):



				December 31,
	Interest Rate*		Maturity	2017			2016
Term Loan B-2	Adjusted LIBOR	+ 3.1875%	March 11, 2021	$	—		$	1,082.7
Term Loan B-3	Adjusted LIBOR	+ 3.50%	March 9, 2023	—			1,339.9
Term Loan B-4	Adjusted LIBOR	+ 2.25%	March 11, 2021	711.3			—
Term Loan B-5	Adjusted LIBOR	+ 2.50%	March 9, 2023	1,041.6			—
Revolving credit facility	Adjusted LIBOR	+ 2.0%	March 9, 2021	—			80.5
Senior notes		5.125%	June 1, 2025	950.0			—
Canadian line of credit	CAD Prime	+ 0.50%	Repayable upon demand	—			—
Total debt				2,702.9			2,503.1
Unamortized debt issuance costs/discounts				(22.8		)	(32.8		)
Current portion of long-term debt				(12.4		)	(105.2		)
Long-term debt				$	2,667.7		$	2,365.1

*The interest rates presented in the table above represent the rates in place at December 31, 2017. The weighted average interest rate on our variable rate debt was 4.15% and 4.39% at December 31, 2017 and 2016, respectively.

On May 31, 2017, the Company used proceeds from the issuance of $950 million senior notes and proceeds from the issuance of $1,767 million in the aggregate of Term Loan B-4 and Term Loan B-5 to repay Term Loan B-2 and Term Loan B-3 in full and to repay the outstanding balance on the revolving credit facility.

Credit Facility

On May 31, 2017, we entered into an Incremental Commitment Agreement and Second Amendment (the "Second Amendment") to the Credit Agreement. The Second Amendment provided for, among other things, (i) the refinancing and repricing of the existing tranche B-2 term loans ("Term Loan B-2") remaining after the repayment with new tranche B-4 term loans in an aggregate principal amount of $717 million ("Term Loan B-4"), (ii) the refinancing and repricing of existing tranche B-3 term loans ("Term Loan B-3") remaining after the repayment with new tranche B-5 term loans in an aggregate principal amount of $1.05 billion ("Term Loan B-5") and (iii) a $350 million senior secured revolving credit facility (the "revolving credit facility"). A portion of the proceeds received from the issuance of the senior notes was used to repay a portion of Term Loan B-2 and Term Loan B-3, as well as the outstanding balance on the 2016 revolving credit facility. No early termination penalties were incurred by the Company; however, we incurred a non-cash loss on the extinguishment of debt of $27.5 million in the second quarter of 2017. The loss was a result of the write-off of unamortized debt issue costs and debt discounts associated with Term Loan B-2 and Term Loan B-3. We capitalized approximately $7.8 million of debt issuance costs in connection with the Second Amendment.

On March 9, 2016, we entered into an Incremental Commitment Agreement and First Amendment (the "First Amendment") to the Credit Agreement. The First Amendment provided for, among other things, (i) a new seven-year senior secured term loan facility ("Term Loan B-3") and (ii) a $300 million, five-year senior secured revolving credit facility (the "2016 revolving credit facility"), which replaced the previously existing revolving credit facility (the "2014/2015 revolving credit facility"). The proceeds received from Term Loan B-3 were used to repay in full Term Loan B-1 and the amount outstanding on the second revolving credit facility. No early termination penalties were incurred by the Company; however, we incurred a non-cash loss on the extinguishment of debt of $4.0 million in the first quarter of 2016. The loss was a result of the write-off of unamortized debt issuance costs associated with Term Loan B-1 and the 2014/2015 revolving credit facility. The First Amendment did not change the amount outstanding on Term Loan B-2, but did increase its interest rate margin. In addition, we capitalized approximately $18.0 million of debt issuance costs in connection with the First Amendment.

The Credit Facility is available for letters of credit, working capital, permitted acquisitions and general corporate purposes. The Credit Agreement provides that with respect to the revolving credit facility, up to $75 million is available for letters of credit and up to $90 million is available for swing line loans.

Both Term Loan B-4 and Term Loan B-5 are payable in quarterly installments equal to 0.25% of their respective original aggregate principal amounts. Such payments commenced on September 30, 2017, with the balances payable at each respective maturity date. The Credit Facility is subject to mandatory prepayments and reduction in an amount equal to the net proceeds of certain debt offerings, certain asset sales and certain insurance recovery events. In addition, in accordance with the terms of the Credit Agreement, 50% of the net cash proceeds from the sale-leaseback of certain technology and capital equipment were used to prepay $5.7 million and $8.4 million of Term Loan B-4 and Term Loan B-5, respectively, for the year ended December 31, 2017. Each such prepayment is credited to prepay, on a pro rata basis, in order of maturity the unpaid amounts due on the first eight scheduled quarterly installments of Term Loan B-4 and Term Loan B-5 and thereafter to the remaining scheduled quarterly installments of each term loan on a pro rata basis.

The obligations of the Company under the Credit Facility are guaranteed by certain of our domestic subsidiaries (the "Subsidiary Guarantors") and are secured by substantially all of the assets of the Company and the Subsidiary Guarantors, including but not limited to: (a) pledges of and first priority perfected security interests in 100% of the equity interests of certain of the Company's and the Subsidiary Guarantors' domestic subsidiaries and 65% of the equity interests of certain of the Company's and the Subsidiary Guarantors' first tier foreign subsidiaries and (b) perfected first priority security interests in substantially all other tangible and intangible assets of the Company and each Subsidiary Guarantor, subject to certain exceptions. The Credit Agreement contains affirmative and negative covenants that we believe are usual and customary for a senior secured credit agreement. The negative covenants include, among other things, limitations on asset sales, mergers and acquisitions, indebtedness, liens, dividends, investments and transactions with our affiliates. The Credit Agreement also requires us to maintain a maximum leverage ratio, provided there are revolving loans outstanding. We were in compliance with the covenants in the Credit Agreement at December 31, 2017.

As set forth in the Credit Agreement, Term Loan B-4 bears interest at Adjusted LIBOR (as defined in the Credit Agreement) plus 2.25%, Term Loan B-5 at Adjusted LIBOR plus 2.50% and revolving loan borrowings at Adjusted LIBOR plus 2.0%. However, for specified types of borrowings, the Company may elect to make Term Loan B-4 borrowings at a Base Rate (as defined in the Credit Agreement) plus 1.25%, Term Loan B-5 at a Base Rate plus 1.50% and revolving loan borrowings at a Base Rate plus 1.0%. The rates on Term Loan B-4 and Term Loan B-5 were 4.00% and 4.25% at December 31, 2017, respectively. In addition, if the Company's Consolidated Senior Secured Leverage Ratio (as defined in the Credit Agreement), which is based on a net debt calculation, increases to levels specified in the Credit Agreement, the applicable interest rate on the revolving credit facility will step up by 25 basis points. The Company also pays a commitment fee of 30 to 35 basis points, payable quarterly, on the average daily unused amount of the revolving credit facility based on the Company's Consolidated Senior Secured Leverage Ratio as described above.

On December 31, 2017, there were no borrowings on the revolving credit facility and $80.5 million was drawn on the 2016 revolving credit facility at December 31, 2016. In addition, we had related outstanding letters of credit in the aggregate amount of $42.8 million and $29.7 million at December 31, 2017 and 2016, respectively, which reduce the amount available for borrowings under the respective revolving credit facility.

Senior Notes

On May 31, 2017, we issued $950 million of 5.125% senior notes due June 1, 2025. The Company will pay interest on the senior notes semi-annually in arrears on June 1 and December 1 of each year, which commenced on December 1, 2017. We may redeem the senior notes, in whole or in part, at any time prior to June 1, 2020 at a redemption price equal to 100% of the principal amount plus a make-whole premium and thereafter at a premium that declines ratably to par in 2023. We capitalized approximately $14.7 million of debt issuance costs in connection with the senior notes. The senior notes are guaranteed by the Subsidiary Guarantors.

Canadian Line of Credit

ADESA Canada has a C$8 million line of credit. The line of credit bears interest at a rate equal to the Canadian prime rate plus 50 basis points. There were no borrowings under the Canadian line of credit at December 31, 2017 or 2016. There were related letters of credit outstanding totaling approximately C$1.0 million and C$0.9 million at December 31, 2017 and 2016, respectively, which reduce credit available under the Canadian line of credit, but do not affect amounts available for borrowings under our revolving credit facility. The line of credit is guaranteed by certain ADESA Canada companies.

Future Principal Payments

At December 31, 2017, aggregate future principal payments on long-term debt are as follows (in millions):



2018	$	12.4
2019	17.7
2020	17.7
2021	702.4
2022	10.5
Thereafter	1,942.2
	$	2,702.9

Financial Instruments

12 Months Ended

Dec. 31, 2017

Financial Instruments [Abstract]

Financial Instruments

Our derivative activities are initiated within the guidelines of documented corporate risk management policies. We do not enter into any derivative transactions for speculative or trading purposes.

Interest Rate Risk Management

We are exposed to interest rate risk on our variable rate borrowings. Accordingly, interest rate fluctuations affect the amount of interest expense we are obligated to pay. We use interest rate derivatives with the objective of managing exposure to interest rate movements, thereby reducing the effect of interest rate changes and the effect they could have on future cash flows. Currently, interest rate cap agreements are used to accomplish this objective.

•

In August 2017, we entered into two interest rate caps with an aggregate notional amount of $800 million to manage our exposure to interest rate movements on our variable rate Credit Facility when three-month LIBOR exceeds 2.0%. The interest rate cap agreements each had an effective date of September 30, 2017 and each mature on September 30, 2019. We paid an aggregate amount of approximately $1.0 million for the caps in August 2017.

•

In March 2017, we entered into two interest rate caps with an aggregate notional amount of $400 million to manage our exposure to interest rate movements on our variable rate Credit Facility when three-month LIBOR exceeds 2.0%. The interest rate cap agreements each had an effective date of March 31, 2017 and each mature on March 31, 2019. We paid an aggregate amount of approximately $0.7 million for the caps in April 2017.

•

In August 2015, we purchased three interest rate caps for an aggregate amount of approximately $1.5 million with an aggregate notional amount of $800 million to manage our exposure to interest rate movements on our variable rate Credit Facility when three-month LIBOR (i) exceeded 2.0% between August 19, 2015 (the effective date) and September 29, 2016 and (ii) exceeded 1.75% between September 30, 2016 and August 19, 2017 (the maturity date).


•	In April 2015, we purchased two interest rate caps for an aggregate amount of approximately $0.7 million with an aggregate notional amount of $400 million to manage our exposure to interest rate movements on our variable rate Credit Facility when three-month LIBOR exceeded 1.5%. The interest rate cap agreements each had an effective date of April 16, 2015 and each matured on March 31, 2017.

We are exposed to credit loss in the event of non-performance by the counterparties; however, non-performance is not anticipated. ASC 815, Derivatives and Hedging, requires companies to recognize all derivative instruments as either assets or liabilities at fair value in the balance sheet. The fair values of the interest rate derivatives are based on quoted market prices for similar instruments from commercial banks. The following table presents the fair value of our interest rate derivatives included in the consolidated balance sheets for the periods presented (in millions):

Asset Derivatives

December 31, 2017

December 31, 2016

Derivatives Not Designated as Hedging Instruments

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

2017 Interest rate caps

Other assets

$

2.6

Other assets

N/A

2015 Interest rate caps

Other assets

N/A

Other assets

$

—

We have not designated any of the interest rate caps as hedges for accounting purposes. Accordingly, changes in the fair value of the interest rate caps are recognized as "Interest expense" in the consolidated statement of income. The following table presents the effect of the interest rate derivatives on our consolidated statements of income for the periods presented (in millions):



	Location of Gain / (Loss) Recognized in Income on Derivatives	Amount of Gain / (Loss) Recognized in Income on Derivatives
		Year Ended December 31,
Derivatives Not Designated as Hedging Instruments		2017		2016			2015
2017 Interest rate caps	Interest expense	$	0.8	N/A			N/A
2015 Interest rate caps	Interest expense	—		$	(0.7	)	$	(1.5	)

Concentrations of Credit Risk

Financial instruments that potentially subject us to credit risk consist principally of interest-bearing investments, finance receivables, trade receivables and interest rate derivatives. We maintain cash and cash equivalents, short-term investments, and certain other financial instruments with various major financial institutions. We perform periodic evaluations of the relative credit standing of these financial institutions and companies and limit the amount of credit exposure with any one institution. Cash and cash equivalents include interest-bearing investments with maturities of three months or less. Due to the nature of our business, substantially all trade and finance receivables are due from vehicle dealers, salvage buyers, institutional sellers and insurance companies. We have possession of vehicles or vehicle titles collateralizing a significant portion of the trade and finance receivables. The risk associated with this concentration is limited due to the large number of accounts and their geographic dispersion. We monitor the creditworthiness of customers to which we grant credit terms in the normal course of business. In the event of nonperformance by counterparties to financial instruments we are exposed to credit-related losses, but management believes this credit risk is limited by periodically reviewing the creditworthiness of the counterparties to the transactions.

Financial Instruments

The carrying amounts of trade receivables, finance receivables, other current assets, accounts payable, accrued expenses and borrowings under our short-term revolving line of credit facilities approximate fair value because of the short-term nature of those instruments.

As of December 31, 2017 and 2016, the estimated fair value of our long-term debt amounted to $2,735.1 million and $2,528.0 million, respectively. The estimates of fair value were based on broker-dealer quotes for our debt as of December 31, 2017 and 2016. The estimates presented on long-term financial instruments are not necessarily indicative of the amounts that would be realized in a current market exchange.

Leasing Agreements

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Leasing Agreements

We lease property, computer equipment and software, automobiles, trucks and trailers, pursuant to operating lease agreements with terms expiring through 2036. Some of the leases contain renewal provisions upon the expiration of the initial lease term, as well as fair market value purchase provisions. In accordance with ASC 840, Leases, rental expense is being recognized ratably over the lease period, including those leases containing escalation clauses. The deferred portion of the rent, for the leases containing escalation clauses, is included in "Other liabilities" on the consolidated balance sheet.

We also lease furniture, fixtures and equipment under capital leases. The economic substance of the leases is that we are financing the purchase of furniture, fixtures and equipment through leases and, accordingly, they are recorded as assets and liabilities. The capital lease liabilities are included in "Other accrued expenses" and "Other liabilities" on the consolidated balance sheet. Depreciation expense includes the amortization of assets held under capital leases.

Total future minimum lease payments for non-cancelable operating and capital leases with terms in excess of one year (excluding renewal periods) as of December 31, 2017 are as follows (in millions):



	Operating Leases		Capital Leases
2018	$	133.3	$	27.8
2019	126.0		19.3
2020	114.1		10.0
2021	105.9		0.3
2022	96.9		—
Thereafter	674.9		—
	$	1,251.1	$	57.4
Less: interest portion of capital leases			2.6
Total			$	54.8

Total lease expense for the years ended December 31, 2017, 2016 and 2015 was $163.5 million, $134.8 million and $115.0 million, respectively.

Income Taxes

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

The components of our income before income taxes and the provision for income taxes are as follows (in millions):



	Year Ended December 31,
	2017			2016			2015
Income before income taxes:
Domestic	$	290.4		$	265.8		$	259.5
Foreign	107.6			89.5			81.0
Total	$	398.0		$	355.3		$	340.5
Income tax expense (benefit):
Current:
Federal	$	89.1		$	100.1		$	88.6
Foreign	30.3			22.9			22.6
State	10.1			14.1			9.7
Total current provision	129.5			137.1			120.9
Deferred:
Federal	(96.1		)	(1.6		)	6.5
Foreign	(3.6		)	(2.4		)	(1.8		)
State	6.2			(0.2		)	0.3
Total deferred provision	(93.5		)	(4.2		)	5.0
Income tax expense	$	36.0		$	132.9		$	125.9

The provision for income taxes was different from the U.S. federal statutory rate applied to income before taxes, and is reconciled as follows:



	Year Ended December 31,
	2017		2016		2015
Statutory rate	35.0	%	35.0	%	35.0	%
State and local income taxes, net	2.3	%	2.4	%	2.1	%
Reserves for tax exposures	(0.1	)%	(0.2	)%	0.3	%
Change in valuation allowance	(0.6	)%	0.6	%	0.3	%
International operations	(3.1	)%	(0.8	)%	(1.2	)%
Stock-based compensation	(1.6	)%	—	%	—	%
Impact of law and rate change	(23.2	)%	—	%	—	%
Other, net	0.3	%	0.4	%	0.5	%
Effective rate	9.0	%	37.4	%	37.0	%

On December 22, 2017, U.S. tax reform (Tax Cuts and Jobs Act of 2017) was enacted. The law includes significant changes to the U.S. corporate income tax system, including a Federal corporate income tax rate reduction from 35 percent to 21 percent effective for tax years beginning after December 31, 2017. As a result, the Company recorded a deferred income tax benefit of $102.7 million related to the remeasurement of its deferred tax assets and liabilities. In addition, the law imposes a one-time deemed repatriation transition tax on the accumulated unrepatriated and untaxed earnings of our foreign subsidiaries. This resulted in the Company recording a current tax expense of $11.1 million.

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We believe that it is more likely than not that the results of future operations will generate sufficient taxable income to realize the net deferred tax assets. The valuation allowance as of December 31, 2017 primarily relates to net operating losses, tax credits and capital loss carryforwards that are not more likely than not to be utilized prior to their expiration.

We offset all deferred tax assets and liabilities by jurisdiction, as well as any related valuation allowance, and present them as a single non-current deferred income tax liability. Deferred tax assets (liabilities) are comprised of the following at December 31 (in millions):



	2017			2016
Gross deferred tax assets:
Allowances for trade and finance receivables	$	5.8		$	9.1
Accruals and liabilities	50.5			62.6
Employee benefits and compensation	22.7			30.6
Net operating loss carryforwards	38.7			25.1
Investment basis difference	(2.1		)	4.1
Other	9.6			11.6
Total deferred tax assets	125.2			143.1
Deferred tax asset valuation allowance	(28.1		)	(26.4		)
Total	97.1			116.7
Gross deferred tax liabilities:
Property and equipment	(94.3		)	(120.0		)
Goodwill and intangible assets	(179.6		)	(274.6		)
Other	(15.9		)	(13.8		)
Total	(289.8		)	(408.4		)
Net deferred tax liabilities	$	(192.7	)	$	(291.7	)

The tax benefit from state and federal net operating loss carryforwards expires as follows (in millions):



2018	$	0.4
2019	0.3
2020	0.8
2021	0.8
2022	0.1
2023 to 2037	36.3
	$	38.7

Permanently reinvested undistributed earnings of our foreign subsidiaries were approximately $282.9 million at December 31, 2017. This balance was impacted in the fourth quarter by management's change in assertion surrounding permanent reinvestment of undistributed earnings of our foreign subsidiaries. Because these amounts have been or will be permanently reinvested in properties and working capital, we have not recorded the deferred taxes associated with these earnings. If the undistributed earnings of foreign subsidiaries were to be remitted, state and local income tax expense and withholding tax expense would need to be recognized, net of any applicable foreign tax credits. It is not practical for us to determine the additional tax that would be incurred upon remittance of these earnings.

We made federal income tax payments, net of federal income tax refunds, of $81.5 million, $79.2 million and $95.2 million in 2017, 2016 and 2015, respectively. State and foreign income taxes paid by us, net of refunds, totaled $44.5 million, $42.4 million and $34.7 million in 2017, 2016 and 2015, respectively.

We apply the provisions of ASC 740, Income Taxes. ASC 740 clarifies the accounting and reporting for uncertainty in income taxes recognized in an enterprise's financial statements. These provisions prescribe a comprehensive model for the financial statement recognition, measurement, presentation and disclosure of uncertain tax positions taken or expected to be taken on income tax returns.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):



	December 31,
	2017			2016
Balance at beginning of period	$	14.0		$	14.9
Increase in prior year tax positions	0.2			1.2
Decrease in prior year tax positions	—			—
Increase in current year tax positions	1.6			1.4
Settlements	—			—
Lapse in statute of limitations	(4.1		)	(3.5		)
Balance at end of period	$	11.7		$	14.0

The total amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate was $7.8 million at December 31, 2017 and 2016.

We record interest and penalties associated with the uncertain tax positions within our provision for income taxes on the income statement. We had reserves totaling $2.4 million and $3.2 million in 2017 and 2016, respectively, associated with interest and penalties, net of tax.

The provision for income taxes involves management judgment regarding interpretation of relevant facts and laws in the jurisdictions in which the Company operates. Future changes in applicable laws, projected levels of taxable income and tax planning could change the effective tax rate and tax balances recorded by us. In addition, U.S. and non-U.S. tax authorities periodically review income tax returns filed by us and can raise issues regarding our filing positions, timing and amount of income or deductions and the allocation of income among the jurisdictions in which we operate. A significant period of time may elapse between the filing of an income tax return and the ultimate resolution of an issue raised by a revenue authority with respect to that return. In the normal course of business we are subject to examination by taxing authorities in the U.S., Canada, United Kingdom and Mexico. In general, the examination of our material tax returns is completed for the years prior to 2012.

Based on the potential outcome of the Company's tax examinations and the expiration of the statute of limitations for specific jurisdictions, it is reasonably possible that the currently remaining unrecognized tax benefits will change within the next 12 months. The associated net tax impact on the reserve balance is estimated to be in the range of a $1.0 million to $2.5 million decrease.

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans 401(k) Plan We maintain a defined contribution 401(k) plan that covers substantially all U.S. employees. Participants are generally allowed to make non-forfeitable contributions up to the annual IRS limits. The Company matches 100 percent of the amounts contributed by each individual participant up to 4 percent of the participant's compensation. Participants are 100 percent vested in the Company's contributions. For the years ended December 31, 2017, 2016 and 2015 we contributed $15.5 million, $13.0 million and $10.8 million, respectively.

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are involved in litigation and disputes arising in the ordinary course of business, such as actions related to injuries; property damage; handling, storage or disposal of vehicles; environmental laws and regulations; and other litigation incidental to the business such as employment matters and dealer disputes. Management considers the likelihood of loss or the incurrence of a liability, as well as the ability to reasonably estimate the amount of loss, in determining loss contingencies. We accrue an estimated loss contingency when it is probable that a liability has been incurred and the amount of loss (or range of possible losses) can be reasonably estimated. Management regularly evaluates current information available to determine whether accrual amounts should be adjusted. Accruals for contingencies including litigation and environmental matters are included in "Other accrued expenses" at undiscounted amounts and exclude claims for recoveries from insurance or other third parties. These accruals are adjusted periodically as assessment and remediation efforts progress, or as additional technical or legal information becomes available. If the amount of an actual loss is greater than the amount accrued, this could have an adverse impact on our operating results in that period. Legal fees are expensed as incurred. We have accrued, as appropriate, for environmental remediation costs anticipated to be incurred at certain of our auction facilities. Liabilities for environmental matters included in "Other accrued expenses" were $0.1 million at December 31, 2017 and 2016. No amounts have been accrued as receivables for potential reimbursement or recoveries to offset this liability. We store a significant number of vehicles owned by various customers that are consigned to us to be auctioned. We are contingently liable for each consigned vehicle until the eventual sale or other disposition, subject to certain natural disaster exceptions. Individual stop loss and aggregate insurance coverage is maintained on the consigned vehicles. These consigned vehicles are not included in the consolidated balance sheets. In the normal course of business, we also enter into various other guarantees and indemnities in our relationships with suppliers, service providers, customers and others. These guarantees and indemnifications do not materially impact our financial condition or results of operations, but indemnifications associated with our actions generally have no dollar limitations and historically have been inconsequential. As noted above, we are involved in litigation and disputes arising in the ordinary course of business, such as actions related to injuries; property damage; handling, storage or disposal of vehicles; environmental laws and regulations; and other litigation incidental to the business such as employment matters and dealer disputes. Such litigation is generally not, in the opinion of management, likely to have a material adverse effect on our financial condition, results of operations or cash flows. Legal and regulatory proceedings which could be material are discussed below. IAA—Lower Duwamish Waterway Since June 2004, IAA has operated a branch on property it leases in Tukwila, Washington just south of Seattle. The property is located adjacent to a Superfund site known as the Lower Duwamish Waterway Superfund Site ("LDW Site"). The LDW Site had been designated a Superfund site in 2001, three years prior to IAA’s tenancy. On March 25, 2008, the United States Environmental Protection Agency, or the "EPA," issued IAA a General Notice of Potential Liability, or "General Notice," pursuant to Section 107(a), and a Request for Information pursuant to Section 104(e) of the Comprehensive Environmental Response, Compensation, and Liability Act, or "CERCLA," related to the LDW Site. On November 7, 2012, the EPA issued IAA a Second General Notice of Potential Liability, or "Second General Notice," for the LDW Site. The EPA's website indicates that the EPA has issued general notice letters to approximately 116 entities, and has issued Section 104(e) Requests to more than 300 entities related to the LDW Site. In the General Notice and Second General Notice, the EPA informed IAA that the EPA believes IAA may be a Potentially Responsible Party, or "PRP," but the EPA did not specify the factual basis for this assertion. At this time, the EPA still has not specified the factual basis for this assertion and has not demanded that IAA pay any funds or take any action apart from responding to the Section 104(e) Information Request. Four PRPs, The Boeing Company, the City of Seattle, the Port of Seattle and King County - the Lower Duwamish Waterway Group ("LDWG"), have funded a remedial investigation and feasibility study related to the cleanup of the LDW Site. In December 2014, the EPA issued a Record of Decision (ROD), detailing the final cleanup plan for the LDW Site. The ROD estimates the cost of cleanup to be $342 million, with the plan involving dredging of 105 acres, capping 24 acres, and enhanced natural recovery of 48 acres. The estimated length of the cleanup is 17 years, including 7 years of active remediation, and 10 years of monitored natural recovery. IAA is aware that certain authorities may bring natural resource damage claims against PRPs. On February 11, 2016, IAA received a Notice of Intent letter from the United States National Oceanic and Atmospheric Administration informing IAA that the Elliott Bay Trustee Council are beginning to conduct an injury assessment for natural resource damages in the LDW. The Notice of Intent indicates that the decision of the trustees to proceed with this natural resources injury assessment followed a pre-assessment screen performed by the trustees. More recently, in a letter dated August 16, 2016, EPA issued a status update to the PRPs at the LDW Site. The letter stated that EPA expects the bulk of the pre-remedial design work currently being performed by the LDWG to be completed by the beginning of 2018, with the Remedial Design/Remedial Action ("RD/RA") phase to follow. EPA expects to initiate RD/RA negotiations with all PRPs beginning in early 2018. At this time, however, the Company does not have adequate information to determine IAA's responsibility, if any, for contamination at this site, or to estimate IAA's loss as a result of this potential liability. In addition, the Washington State Department of Ecology ("Ecology") is working with the EPA in relation to the LDW Site, primarily to investigate and address sources of potential contamination contributing to the LDW Site. In 2007, IAA installed a stormwater capture and filtration system designed to treat sources of potential contamination before discharge to the LDW site. The immediate-past property owner, the former property owner and IAA have had discussions with Ecology concerning possible source control measures, including an investigation of the water and soils entering the stormwater system, an analysis of the source of contamination identified within the system, if any, and possible repairs and upgrades to the stormwater system if required. Additional source control measures, if any, are not expected to have a material adverse effect on future recurring operating costs.

Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2017

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss consisted of the following (in millions):



	December 31,
	2017			2016
Foreign currency translation loss	$	(25.3	)	$	(49.4	)
Unrealized gain on postretirement benefit obligation, net of tax	0.1			0.1
Accumulated other comprehensive loss	$	(25.2	)	$	(49.3	)

Segment Information

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Information

ASC 280, Segment Reporting, requires reporting of segment information that is consistent with the manner in which the chief operating decision maker operates and views the Company. Our operations are grouped into three operating segments: ADESA Auctions, IAA and AFC, which also serve as our reportable business segments. These reportable business segments offer different services and have fundamental differences in their operations.

ADESA Auctions encompasses all physical and online wholesale auctions throughout North America (U.S., Canada and Mexico). Beginning in October 2017, the ADESA Auctions segment includes TradeRev, an online automotive remarketing system where dealers can launch and participate in real-time vehicle auctions at any time. Beginning in June 2016, the ADESA Auctions segment also includes ADESA Remarketing Limited (formerly known as GRS), an online whole car vehicle remarketing business in the United Kingdom. ADESA Auctions relates to used vehicle remarketing, including auction services, remarketing, or make ready services and all are interrelated, synergistic elements along the auto remarketing chain.

IAA encompasses all salvage auctions throughout North America (U.S. and Canada). Beginning in June 2015, the IAA segment also includes HBC, which operates salvage vehicle auctions and related services in the United Kingdom. IAA provides insurance companies and other vehicle suppliers cost-effective salvage processing solutions, including selling total loss and recovered theft vehicles. As such, IAA relates to total loss vehicle remarketing, including auction services, remarketing, or make ready services. All are interrelated, synergistic elements along the total loss vehicle remarketing chain.

AFC is primarily engaged in the business of providing short-term, inventory-secured financing to independent, used vehicle dealers. AFC also includes other businesses and ventures that AFC may enter into, focusing on providing independent used vehicle dealer customers with other related services and products, including vehicle service contracts. AFC conducts business primarily at or near wholesale used vehicle auctions in the U.S. and Canada.

The holding company is maintained separately from the three reportable segments and includes expenses associated with the corporate offices, such as salaries, benefits and travel costs for the corporate management team, certain human resources, information technology and accounting costs, and certain insurance, treasury, legal and risk management costs. Holding company interest expense includes the interest expense incurred on capital leases and the corporate debt structure. Intercompany charges relate primarily to interest on intercompany debt or receivables and certain administrative costs allocated by the holding company.

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2017 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,937.5		$	1,219.2		$	301.3		$	—		$	3,458.0
Operating expenses
Cost of services (exclusive of depreciation and amortization)	1,123.9			778.1			85.2			—			1,987.2
Selling, general and administrative	360.0			107.1			30.9			142.2			640.2
Depreciation and amortization	113.1			93.1			31.3			27.1			264.6
Total operating expenses	1,597.0			978.3			147.4			169.3			2,892.0
Operating profit (loss)	340.5			240.9			153.9			(169.3		)	566.0
Interest expense	1.2			—			43.6			119.2			164.0
Other (income) expense, net	(0.3		)	(0.9		)	—			(0.7		)	(1.9		)
Loss on extinguishment of debt	—			—			—			27.5			27.5
Gain on previously held equity interest value	(21.6		)	—			—			—			(21.6		)
Intercompany expense (income)	47.4			37.8			(20.2		)	(65.0		)	—
Income (loss) before income taxes	313.8			204.0			130.5			(250.3		)	398.0
Income taxes	52.9			38.0			26.6			(81.5		)	36.0
Net income (loss)	$	260.9		$	166.0		$	103.9		$	(168.8	)	$	362.0
Total assets	$	3,132.3		$	1,438.4		$	2,315.6		$	98.0		$	6,984.3
Capital expenditures	$	66.9		$	51.6		$	6.1		$	27.6		$	152.2

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2016 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,765.3		$	1,098.0		$	286.8		$	—		$	3,150.1
Operating expenses
Cost of services (exclusive of depreciation and amortization)	1,036.5			708.0			82.9			—			1,827.4
Selling, general and administrative	327.0			104.2			28.7			123.2			583.1
Depreciation and amortization	100.0			87.9			31.1			21.6			240.6
Total operating expenses	1,463.5			900.1			142.7			144.8			2,651.1
Operating profit (loss)	301.8			197.9			144.1			(144.8		)	499.0
Interest expense	0.1			—			34.1			104.6			138.8
Other (income) expense, net	(0.5		)	(0.6		)	—			0.6			(0.5		)
Loss on extinguishment of debt	—			—			1.4			4.0			5.4
Intercompany expense (income)	52.6			38.1			(33.8		)	(56.9		)	—
Income (loss) before income taxes	249.6			160.4			142.4			(197.1		)	355.3
Income taxes	92.7			59.3			54.0			(73.1		)	132.9
Net income (loss)	$	156.9		$	101.1		$	88.4		$	(124.0	)	$	222.4
Total assets	$	2,898.0		$	1,358.9		$	2,213.8		$	86.9		$	6,557.6
Capital expenditures	$	74.8		$	41.1		$	7.3		$	31.9		$	155.1

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2015 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,427.8		$	994.4		$	268.4		$	—		$	2,690.6
Operating expenses
Cost of services (exclusive of depreciation and amortization)	836.9			633.6			78.0			—			1,548.5
Selling, general and administrative	276.6			98.1			27.8			99.5			502.0
Depreciation and amortization	86.2			80.8			30.8			15.0			212.8
Total operating expenses	1,199.7			812.5			136.6			114.5			2,263.3
Operating profit (loss)	228.1			181.9			131.8			(114.5		)	427.3
Interest expense	0.7			—			24.1			66.6			91.4
Other (income) expense, net	(1.7		)	(1.7		)	(1.5		)	0.3			(4.6		)
Intercompany expense (income)	57.6			38.4			(25.3		)	(70.7		)	—
Income (loss) before income taxes	171.5			145.2			134.5			(110.7		)	340.5
Income taxes	62.3			52.4			51.3			(40.1		)	125.9
Net income (loss)	$	109.2		$	92.8		$	83.2		$	(70.6	)	$	214.6
Total assets	$	2,390.9		$	1,292.1		$	2,025.0		$	63.5		$	5,771.5
Capital expenditures	$	70.0		$	40.4		$	7.0		$	17.3		$	134.7

Geographic Information

Our foreign operations include Canada, Mexico and the U.K. Most of our operations outside the U.S. are in Canada. Information regarding the geographic areas of our operations is set forth below (in millions):



	Year Ended December 31,
	2017		2016		2015
Operating revenues
U.S.	$	3,010.3	$	2,737.6	$	2,337.9
Foreign	447.7		412.5		352.7
	$	3,458.0	$	3,150.1	$	2,690.6



	December 31,
	2017		2016
Long-lived assets
U.S.	$	3,452.4	$	3,447.5
Foreign	394.5		268.9
	$	3,846.9	$	3,716.4

No single customer accounted for more than ten percent of our total revenues in any fiscal year presented.

Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Information for any one quarterly period is not necessarily indicative of the results that may be expected for the year.



2017 Quarter Ended	March 31			June 30			Sept. 30			Dec. 31
Operating revenues	$	866.6		$	858.0		$	843.0		$	890.4
Operating expenses
Cost of services (exclusive of depreciation and amortization)	501.2			481.7			479.2			525.1
Selling, general, and administrative	157.4			154.6			155.7			172.5
Depreciation and amortization	64.5			64.5			66.2			69.4
Total operating expenses	723.1			700.8			701.1			767.0
Operating profit	143.5			157.2			141.9			123.4
Interest expense	40.3			40.1			41.5			42.1
Other (income) expense, net	(0.1		)	(1.5		)	(0.1		)	(0.2		)
Loss on extinguishment of debt	—			27.5			—			—
Gain on previously held equity investment value	—			—			—			(21.6		)
Income before income taxes	103.3			91.1			100.5			103.1
Income taxes	34.1			33.9			37.7			(69.7		)
Net income	$	69.2		$	57.2		$	62.8		$	172.8
Basic net income per share of common stock	$	0.51		$	0.42		$	0.46		$	1.28
Diluted net income per share of common stock	$	0.50		$	0.41		$	0.46		$	1.27



2016 Quarter Ended	March 31			June 30			Sept. 30		Dec. 31
Operating revenues	$	758.3		$	788.5		$	789.6	$	813.7
Operating expenses
Cost of services (exclusive of depreciation and amortization)	432.0			447.6			459.5		488.3
Selling, general, and administrative	141.1			146.9			146.3		148.8
Depreciation and amortization	56.4			59.0			60.5		64.7
Total operating expenses	629.5			653.5			666.3		701.8
Operating profit	128.8			135.0			123.3		111.9
Interest expense	28.7			35.8			36.3		38.0
Other (income) expense, net	(1.3		)	(0.3		)	0.8		0.3
Loss on extinguishment of debt	4.0			—			—		1.4
Income before income taxes	97.4			99.5			86.2		72.2
Income taxes	36.7			37.7			31.8		26.7
Net income	$	60.7		$	61.8		$	54.4	$	45.5
Basic net income per share of common stock	$	0.44		$	0.45		$	0.39	$	0.33
Diluted net income per share of common stock	$	0.44		$	0.44		$	0.39	$	0.33

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2018, the Company acquired STRATIM Systems Inc. ("STRATIM"). STRATIM is a mobility and fleet management software company based in San Francisco, California that uses data analytics to help fleet owners manage, maintain and service their fleets. The addition of STRATIM supplements KAR’s broad portfolio of wholesale used vehicle physical, online and digital auction marketplaces and ancillary service providers. The purchase accounting related to this acquisition is incomplete. Financial results for STRATIM will be included in our consolidated financial statements beginning in the first quarter of 2018.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Principles of Consolidation

The consolidated financial statements include the accounts of KAR Auction Services and all of its majority owned subsidiaries. Significant intercompany transactions and balances have been eliminated.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates based in part on assumptions about current, and for some estimates, future economic and market conditions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the period. Although the current estimates contemplate current conditions and expected future changes, as appropriate, it is reasonably possible that future conditions could differ from these estimates, which could materially affect our results of operations and financial position. Among other effects, such changes could result in future impairments of goodwill, intangible assets and long-lived assets, incremental losses on finance receivables, additional allowances on accounts receivable and deferred tax assets, changes in litigation and other loss contingencies and changes in self insurance reserves.

Business Segments

Our operations are grouped into three operating segments: ADESA Auctions, IAA and AFC. The three operating segments also serve as our reportable business segments. Operations are measured through detailed budgeting and monitoring of contributions to consolidated income by each business segment.

Derivative Instruments and Hedging Activity

We recognize all derivative financial instruments in the consolidated financial statements at fair value in accordance with Accounting Standards Codification ("ASC") 815, Derivatives and Hedging. We currently use four interest rate caps to manage the variability of cash flows to be paid due to interest rate movements on our variable rate debt. The fair values of the interest rate derivatives are based on quoted market prices for similar instruments from commercial banks. The fair value of the derivatives is recorded in "Other assets" on the consolidated balance sheet. We have not designated any of the current interest rate caps as hedges for accounting purposes. Accordingly, changes in the fair value of the interest rate derivatives are recognized as "Interest expense" in the consolidated statement of income.

Foreign Currency Translation

The local currency is the functional currency for each of our foreign entities. Revenues and expenses denominated in foreign currencies are translated into U.S. dollars at average exchange rates in effect during the year. Assets and liabilities of foreign operations are translated using the exchange rates in effect at year end. Foreign currency transaction gains and losses are included in the consolidated statements of income within "Other income, net" and resulted in a gain of $0.8 million for the year ended December 31, 2017, a loss of $0.7 million for the year ended December 31, 2016 and a loss of $1.0 million for the year ended December 31, 2015. Adjustments arising from the translation of net assets located outside the U.S. (gains and losses) are shown as a component of "Accumulated other comprehensive income."

Cash Equivalents

All highly liquid investments with an original maturity of three months or less are considered to be cash equivalents. These investments are valued at cost, which approximates fair value.

Restricted Cash

AFC Funding Corporation, a wholly-owned, bankruptcy remote, consolidated, special purpose subsidiary of AFC, is required to maintain a minimum cash reserve of 1 percent of total receivables sold to the group of bank purchasers as security for the receivables sold. Automotive Finance Canada Inc. ("AFCI") is also required to maintain a minimum cash reserve of 1 percent of total receivables sold to its securitization facility. The amount of the cash reserve depends on circumstances which are set forth in the securitization agreements. AFC also maintains other cash reserves from time to time associated with its banking and vehicle service contract program insurance relationships.

Receivables

Trade receivables include the unremitted purchase price of vehicles purchased by third parties at the auctions, fees to be collected from those buyers and amounts due for services provided by us related to certain consigned vehicles in our possession. The amounts due with respect to the consigned vehicles are generally deducted from the sales proceeds upon the eventual auction or other disposition of the related vehicles.

Finance receivables include floorplan receivables created by financing dealer purchases of vehicles in exchange for a security interest in those vehicles and special purpose loans. Floorplan receivables become due at the earlier of the dealer subsequently selling the vehicle or a predetermined time period (generally 30 to 90 days). Special purpose loans relate to loans that are either line of credit loans or working capital loans that can be either secured or unsecured based on the facts and circumstances of the specific loans.

Due to the nature of our business, substantially all trade and finance receivables are due from vehicle dealers, salvage buyers, institutional sellers and insurance companies. We have possession of vehicles or vehicle titles collateralizing a significant portion of the trade and finance receivables.

Trade receivables and finance receivables are reported net of an allowance for doubtful accounts and credit losses. The allowances for doubtful accounts and credit losses are based on management's evaluation of the receivables portfolio under current conditions, the volume of the portfolio, overall portfolio credit quality, review of specific collection issues and such other factors which in management's judgment deserve recognition in estimating losses.

Other Current Assets

Other current assets consist of inventories, prepaid expenses, taxes receivable and other miscellaneous assets. The inventories, which consist of vehicles, supplies and parts, are accounted for on the specific identification method and are stated at the lower of cost or net realizable value.

Goodwill

Goodwill represents the excess of cost over fair value of identifiable net assets of businesses acquired. Goodwill is tested for impairment annually in the second quarter, or more frequently as impairment indicators arise. ASC 350, Intangibles—Goodwill and Other, permits an entity to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount before applying the two-step goodwill impairment model. If it is determined through the qualitative assessment that a reporting unit's fair value is more likely than not greater than its carrying value, the remaining impairment steps would be unnecessary. The qualitative assessment is optional, allowing companies to go directly to the quantitative assessment. The quantitative assessment for goodwill impairment is a two-step test. Under the first step, the fair value of each reporting unit is compared with its carrying value (including goodwill). If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and we must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit's goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation, in accordance with ASC 805, Business Combinations. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. Fair value of the reporting unit is determined using a discounted cash flow analysis. If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed.

Customer Relationships and Other Intangible Assets

Customer relationships are amortized on a straight-line basis over the life determined in the valuation of the particular acquisition. Other intangible assets generally consist of tradenames, computer software and non-compete agreements, which if amortized, are amortized using the straight-line method. Tradenames with indefinite lives are not amortized and tradenames that have been assigned a useful life are amortized over their estimated useful lives. Costs incurred related to software developed or obtained for internal use are capitalized during the application development stage of software development and amortized over their estimated useful lives. The non-compete agreements are amortized over the life of the agreements. The lives of other intangible assets are re-evaluated periodically when facts and circumstances indicate that revised estimates of useful lives may be warranted. Indefinite-lived tradenames are assessed for impairment, in accordance with ASC 350, annually in the second quarter or more frequently as impairment indicators arise. At the end of each assessment, we make a determination as to whether the tradenames still have an indefinite life.

Property and Equipment

Property and equipment are stated at historical cost less accumulated depreciation. Depreciation is computed using the straight-line method at rates intended to depreciate the costs of assets over their estimated useful lives. Upon retirement or sale of property and equipment, the cost of the disposed assets and related accumulated depreciation is removed from the accounts and any resulting gain or loss is credited or charged to selling, general and administrative expenses. Expenditures for normal repairs and maintenance are charged to expense as incurred. Additions and expenditures for improving or rebuilding existing assets that extend the useful life are capitalized. Leasehold improvements made either at the inception of the lease or during the lease term are amortized over the shorter of their economic lives or the lease term including any renewals that are reasonably assured.

Unamortized Debt Issuance Costs

Debt issuance costs reflect the expenditures incurred in conjunction with term loan debt, the revolving credit facility, the senior notes and the U.S. and Canadian receivables purchase agreements. The debt issuance costs are being amortized to interest expense using the effective interest method or the straight-line method, as applicable, over the lives of the related debt issues. Debt issuance costs are presented as a direct reduction from the carrying amount of the related debt liability.

Other Assets

Other assets consist of equity and cost method investments, below market leases, deposits, notes receivable and other long-term assets.

Long-Lived Assets

Management reviews our property and equipment, customer relationships and other intangible assets for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. The determination includes evaluation of factors such as current market value, future asset utilization, business climate, and future cash flows expected to result from the use of the related assets. If the carrying amount of a long-lived asset exceeds the total amount of the estimated undiscounted future cash flows from that asset, a loss is recognized in the period to the extent that the carrying amount exceeds the fair value of the asset. The impairment analysis is based on our current business strategy, expected growth rates and estimated future economic and regulatory conditions.

Accounts Payable

Accounts payable include amounts due sellers from the proceeds of the sale of their consigned vehicles less any fees, as well as outstanding checks to sellers and vendors. Book overdrafts, representing outstanding checks in excess of funds on deposit, are recorded in "Accounts payable" and amounted to $162.7 million and $154.4 million at December 31, 2017 and 2016, respectively.

Self Insurance Reserves

We self-insure our employee medical benefits, as well as a portion of our automobile, general liability and workers' compensation claims. We have insurance coverage that limits the exposure on individual claims. The cost of the insurance is expensed over the contract periods. We record an accrual for the claims expense related to our employee medical benefits, automobile, general liability and workers' compensation claims based upon the expected amount of all such claims. Accrued medical benefits and workers' compensation expenses are included in "Accrued employee benefits and compensation expenses" while accrued automobile and general liability expenses are included in "Other accrued expenses."

Environmental Liabilities

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated, based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress, or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in "Other accrued expenses" at undiscounted amounts and exclude claims for recoveries from insurance or other third parties.

Revenue Recognition

ADESA Auction Services

Revenues and the related costs are recognized when the services are performed. Auction fees from sellers and buyers are recognized upon the sale of the vehicle through the auction process. Most of the vehicles that are sold through auctions are consigned to ADESA by the seller and held at ADESA's facilities or third party locations. ADESA does not take title to these consigned vehicles and recognizes revenue when a service is performed as requested by the owner of the vehicle. ADESA does not record the gross selling price of the consigned vehicles sold at auction as revenue. Instead, ADESA records only its auction fees as revenue because it does not take title to the consigned vehicles and has no influence on the vehicle auction selling price agreed to by the seller and buyer at the auction. Our buyer fees and dealer seller fees are typically based on a tiered structure with fees increasing with the sale price of the vehicle, while institutional seller fees are typically fixed. Revenues from reconditioning, logistics, vehicle inspection and certification, titling, evaluation and salvage recovery services are generally recognized when the services are performed.

IAA Salvage Services

Revenues (including vehicle sales and fee income) are generally recognized at the date the vehicles are sold at auction. Most of the vehicles that are sold through auctions are consigned to IAA by the seller and held at IAA's facilities. IAA does not take title to these consigned vehicles and recognizes revenue when a service is performed as requested by the owner of the vehicle. IAA does not record the gross selling price of the consigned vehicles sold at auction as revenue. IAA seller revenues represent the combination of the inbound tow, processing, storage, titling, enhancing and auctioning of the vehicle and are recognized at the date the vehicles are sold at auction. Revenue not recognized at the date the vehicles are sold at auction includes annual buyer registration fees, which are recognized on a straight-line basis, and certain buyer-related fees, which are recognized when payment is received.

AFC

AFC's revenue is comprised of interest and fee income, provision for credit losses and other revenues associated with our finance receivables, as well as other service revenue. The following table summarizes the primary components of AFC's revenue:



	Year Ended December 31,
AFC Revenue (in millions)	2017			2016			2015
Interest and fee income	$	290.3		$	275.1		$	246.8
Other revenue	11.8			10.3			9.7
Provision for credit losses	(33.9		)	(30.7		)	(16.0		)
Other service revenue	33.1			32.1			27.9
	$	301.3		$	286.8		$	268.4

Interest and fee income

Interest on finance receivables is recognized based on the number of days the vehicle remains financed. AFC ceases recognition of interest on finance receivables when the loans become delinquent, which is generally 31 days past due. Dealers are also charged a fee to floorplan a vehicle ("floorplan fee"), to extend the terms of the receivable ("curtailment fee") and a document processing fee. AFC fee income including floorplan and curtailment fees is recognized over the life of the finance receivable.

Other revenue

Other revenue includes lot check fees, filing fees, lien holder payoff services and other related program fees, each of which are charged to and collected from AFC's customers.

Other service revenue

Other service revenue represents the revenue generated by Preferred Warranties, Inc. ("PWI"). PWI receives advance payments for vehicle service contracts and unearned revenue is deferred and recognized over the terms of the contracts utilizing a historical earnings curve. The average term of the contracts originated in 2017 was approximately 1.7 years and PWI had unearned revenue of $32.8 million at December 31, 2017.

Income Taxes

We file federal, state and foreign income tax returns in accordance with the applicable rules of each jurisdiction. We account for income taxes under the asset and liability method in accordance with ASC 740, Income Taxes. The provision for income taxes includes federal, foreign, state and local income taxes payable, as well as deferred taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable amounts in years in which those temporary differences are expected to be recovered or settled. If it is more likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized.

In accordance with ASC 740, we recognize the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

Net Income per Share

Basic net income per share is computed by dividing net income by the weighted average common shares outstanding during the year. Diluted net income per share represents net income divided by the sum of the weighted average common shares outstanding plus potential dilutive instruments related to our stock-based employee compensation program. The effect of stock options and restricted stock on net income per share-diluted is determined through the application of the treasury stock method, whereby net proceeds received by the Company based on assumed exercises are hypothetically used to repurchase our common stock at the average market price during the period. Stock options that would have an anti-dilutive effect on net income per diluted share and performance-based restricted stock units ("PRSUs") subject to performance conditions which have not yet been satisfied are excluded from the calculations.

Accounting for Stock-Based Compensation

The Company accounts for stock-based compensation under ASC 718, Compensation—Stock Compensation. We recognize all stock-based compensation as expense in the financial statements and that cost is measured as the fair value of the award at the grant date for equity-classified awards.

We adopted Accounting Standards Update ("ASU") 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, in the first quarter of 2017. As a result of the adoption, the Company elected to recognize the impact of forfeitures as they occur. In addition, the Company now recognizes excess tax benefits and tax deficiencies related to employee stock-based compensation within income tax expense. As a result, on a prospective basis, we recognized $6.4 million of excess tax benefits from stock-based compensation as a discrete item in our income tax expense for the year ended December 31, 2017. Historically, these amounts were recorded as additional paid-in capital. We have also retrospectively applied ASU 2016-09 to our consolidated statements of cash flows for the years ended December 31, 2016 and December 31, 2015, which resulted in a reclassification of excess tax benefits from stock-based compensation of $17.2 million and $7.1 million, respectively, from cash flows provided by financing activities to cash flows provided by operating activities.

New Accounting Standards

In May 2017, the Financial Accounting Standards Board ("FASB") issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The new guidance is expected to reduce diversity in practice and result in fewer changes to the terms of an award being accounted for as modifications. Changes that do not impact the fair value, vesting conditions or classification of an award will not require modification accounting. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2017-09 will have a material impact on the consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, which simplifies the test for goodwill impairment by eliminating Step 2 (implied fair value measurement). Instead goodwill impairment would be measured as the amount by which a reporting unit's carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill. The new guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2017-04 will have a material impact on the consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, which addresses diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. We do not expect the adoption of ASU 2016-18 will have a material impact on the consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. The new guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact the adoption of ASU 2016-15 will have on the consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The update changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. The new guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted beginning in annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We do not expect the adoption of ASU 2016-13 will have a material impact on the consolidated financial statements based on the short-term nature of AFC's loans.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which replaces existing lease guidance. The ASU is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use assets and corresponding lease liabilities on the balance sheet, with an exception for leases that meet the definition of a short-term lease. The new guidance will continue to classify leases as either finance or operating, with classification affecting the pattern of expense recognition in the statement of income. The new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted and the ASU is required to be applied with a modified retrospective approach to each prior reporting period presented with various optional practical expedients. The Company is currently evaluating the impact the adoption of ASU 2016-02 will have on the consolidated financial statements and anticipates that the new guidance will significantly impact its consolidated financial statements, as the Company has a significant number of leases. Our current minimum commitments under non-cancelable operating leases are disclosed in the "Contractual Obligations" section of "Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II, Item 7 and in Note 13. In addition, the recognition of these leases on our consolidated balance sheet would increase our net debt calculation which is included in the determination of our Consolidated Senior Secured Leverage Ratio. In this event, our Credit Agreement specifies that the covenant shall continue to be calculated as if the accounting standard had not occurred and that we could enter into negotiations to amend such provisions in the Credit Agreement so as to equitably reflect such changes with the desired result that the criteria for evaluating our financial condition would be the same after the change as if such change had not been made.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which superseded the revenue recognition requirements in ASC 605, Revenue Recognition. The new guidance provides clarification on the recognition of revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 also requires additional disclosures to help financial statement users better understand the nature, amount, timing and uncertainty of revenue that is recognized. In August 2015, the FASB issued ASU 2015-14 Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which defers the effective date of ASU 2014-09 by one year. In accordance with the agreed upon delay, the new guidance is effective for the first annual reporting period and interim periods beginning after December 15, 2017, and will require either retrospective application to each prior reporting period presented or retrospective application with the cumulative effect of initially applying the standard recognized at the date of adoption. The Company will use retrospective application with the cumulative effect as its transition method. The Company has evaluated the impact the adoption of ASU 2014-09 will have on the consolidated financial statements and has assessed its contracts with customers. The adoption of ASU 2014-09 will not result in any material adjustments and it will not have a material impact on the consolidated financial statements.

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of the primary components of AFC's revenue

AFC's revenue is comprised of interest and fee income, provision for credit losses and other revenues associated with our finance receivables, as well as other service revenue. The following table summarizes the primary components of AFC's revenue:



	Year Ended December 31,
AFC Revenue (in millions)	2017			2016			2015
Interest and fee income	$	290.3		$	275.1		$	246.8
Other revenue	11.8			10.3			9.7
Provision for credit losses	(33.9		)	(30.7		)	(16.0		)
Other service revenue	33.1			32.1			27.9
	$	301.3		$	286.8		$	268.4

Stock and Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of stock-based compensation expense by type of award

The following table summarizes our stock-based compensation expense by type of award (in millions):



	Year Ended December 31,
	2017		2016		2015
PRSUs	$	13.2	$	10.3	$	6.1
RSUs	9.5		5.9		2.5
Service options	1.5		1.9		3.1
Total stock-based compensation expense	$	24.2	$	18.1	$	11.7

RSUs

Stock and Stock-Based Compensation Plans

Summary of RSU activity

The following table summarizes RSU activity, excluding dividend equivalents, under the Omnibus Plan for the year ended December 31, 2017:



Restricted Stock Units	Number		Weighted Average Grant Date Fair Value
RSUs at January 1, 2017	417,712		$	35.67
Granted	299,955		44.03
Vested	(163,221	)	35.92
Forfeited	(23,228	)	38.99
RSUs at December 31, 2017	531,218		$	40.18

Service options

Stock and Stock-Based Compensation Plans

Summary of option activity

The following table summarizes service option activity under the Omnibus Plan and the Plan for the year ended December 31, 2017:



Service Options	Number		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	1,687,925		$	22.59
Granted	—		N/A
Exercised	(303,062	)	18.31
Forfeited	(5,000	)	25.80
Canceled	(274	)	10.00
Outstanding at December 31, 2017	1,379,589		$	23.54	5.1 years	$	37.2
Exercisable at December 31, 2017	1,095,427		$	21.87	4.8 years	$	31.4

Exit options

Stock and Stock-Based Compensation Plans

Summary of option activity

The following table summarizes exit option activity under the Omnibus Plan and the Plan for the year ended December 31, 2017:



Exit Options	Number		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	991,276		$	11.90
Granted	—		N/A
Exercised	(444,877	)	11.23
Forfeited	—		N/A
Canceled	(823	)	10.00
Outstanding at December 31, 2017	545,576		$	12.46	1.8 years	$	20.8
Exercisable at December 31, 2017	545,576		$	12.46	1.8 years	$	20.8

Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share, Basic and Diluted [Abstract]

Schedule of computation of net income per share

The following table sets forth the computation of net income per share (in millions except per share amounts):



	Year Ended December 31,
	2017		2016		2015
Net income	$	362.0	$	222.4	$	214.6
Weighted average common shares outstanding	136.3		137.6		140.1
Effect of dilutive stock options and restricted stock awards	1.7		1.5		2.2
Weighted average common shares outstanding and potential common shares	138.0		139.1		142.3
Net income per share
Basic	$	2.66	$	1.62	$	1.53
Diluted	$	2.62	$	1.60	$	1.51

Allowance for Credit Losses and Doubtful Accounts (Tables)

12 Months Ended

Dec. 31, 2017

Finance receivables

Allowance for Credit Losses and Doubtful Accounts

Summary of the changes in the allowance for credit losses and doubtful accounts

The following is a summary of the changes in the allowance for credit losses related to finance receivables (in millions):



	Year Ended December 31,
	2017			2016			2015
Allowance for Credit Losses
Balance at beginning of period	$	12.0		$	9.0		$	8.0
Provision for credit losses	33.9			30.7			16.0
Recoveries	5.3			4.2			4.1
Less charge-offs	(38.2		)	(31.9		)	(19.1		)
Balance at end of period	$	13.0		$	12.0		$	9.0

Trade receivables

Allowance for Credit Losses and Doubtful Accounts

Summary of the changes in the allowance for credit losses and doubtful accounts

The following is a summary of changes in the allowance for doubtful accounts related to trade receivables (in millions):



	Year Ended December 31,
	2017			2016			2015
Allowance for Doubtful Accounts
Balance at beginning of period	$	13.0		$	6.6		$	6.3
Provision for credit losses	4.6			9.8			2.8
Less net charge-offs	(6.4		)	(3.4		)	(2.5		)
Balance at end of period	$	11.2		$	13.0		$	6.6

Finance Receivables and Obligations Collateralized by Finance Receivables (Tables)

12 Months Ended

Dec. 31, 2017

Notes, Loans and Financing Receivable, Net, Current [Abstract]

Schedule of quantitative information about delinquencies, credit losses less recoveries ("net credit losses") and components of securitized financial assets and other related assets managed

The following tables present quantitative information about delinquencies, credit losses less recoveries ("net credit losses") and components of securitized financial assets and other related assets managed. For purposes of this illustration, delinquent receivables are defined as receivables 31 days or more past due.



	December 31, 2017				Net Credit Losses During 2017
	Total Amount of:
(in millions)	Receivables		Receivables Delinquent
Floorplan receivables	$	1,901.1	$	12.1	$	32.9
Other loans	11.5		—		—
Total receivables managed	$	1,912.6	$	12.1	$	32.9



	December 31, 2016				Net Credit Losses During 2016
	Total Amount of:
(in millions)	Receivables		Receivables Delinquent
Floorplan receivables	$	1,781.1	$	12.0	$	27.7
Other loans	11.1		—		—
Total receivables managed	$	1,792.2	$	12.0	$	27.7

Schedule of obligations collateralized by finance receivables

Obligations collateralized by finance receivables consisted of the following:



	December 31, 2017			December 31, 2016
Obligations collateralized by finance receivables, gross	$	1,371.4		$	1,300.0
Unamortized securitization issuance costs	(13.3		)	(19.7		)
Obligations collateralized by finance receivables	$	1,358.1		$	1,280.3

Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

Goodwill consisted of the following (in millions):



	ADESA Auctions			IAA			AFC		Total
Balance at December 31, 2015	$	1,039.4		$	537.5		$	219.0	$	1,795.9
Increase for acquisition activity	224.1			0.8			44.7		269.6
Other	(6.6		)	(1.9		)	—		(8.5		)
Balance at December 31, 2016	$	1,256.9		$	536.4		$	263.7	$	2,057.0
Increase for acquisition activity	130.7			—			—		130.7
Other	2.8			1.2			—		4.0
Balance at December 31, 2017	$	1,390.4		$	537.6		$	263.7	$	2,191.7

Summary of customer relationships

A summary of customer relationships is as follows (in millions):



		December 31, 2017							December 31, 2016
	Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Carrying Value		Gross Carrying Amount		Accumulated Amortization			Carrying Value
Customer relationships	5 - 19	$	1,180.6	$	(805.0	)	$	375.6	$	1,168.8	$	(707.8	)	$	461.0

Summary of other intangibles

A summary of other intangibles is as follows (in millions):



		December 31, 2017							December 31, 2016
	Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Carrying Value		Gross Carrying Amount		Accumulated Amortization			Carrying Value
Tradenames	2 - Indefinite	$	203.4	$	(8.6	)	$	194.8	$	201.1	$	(6.9	)	$	194.2
Computer software & technology	3 - 13	470.9		(315.6		)	155.3		404.8		(279.7		)	125.1
Covenants not to compete	1 - 5	15.0		(14.5		)	0.5		15.8		(15.0		)	0.8
Total		$	689.3	$	(338.7	)	$	350.6	$	621.7	$	(301.6	)	$	320.1

Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

Property and equipment consisted of the following (in millions):



	Useful Lives (in years)	December 31,
	Useful Lives (in years)	2017			2016
Land		$	270.9		$	266.4
Buildings	5 - 40	249.5			244.7
Land improvements	5 - 20	173.8			167.7
Building and leasehold improvements	3 - 33	436.8			384.5
Furniture, fixtures and equipment	1 - 10	456.4			388.6
Vehicles	3 - 10	22.3			19.1
Construction in progress		53.6			27.1
		1,663.3			1,498.1
Accumulated depreciation		(755.1		)	(655.6		)
Property and equipment, net		$	908.2		$	842.5

Furniture, fixtures and equipment

Assets held under capital leases

Summary of assets included under capital leases

The assets included above that are held under capital leases are summarized below (in millions):



	December 31,
Classes of Property	2017			2016
Furniture, fixtures and equipment	$	180.0		$	149.2
Accumulated depreciation	(119.2		)	(94.2		)
Capital lease assets	$	60.8		$	55.0

Self Insurance and Retained Loss Reserves (Tables)

12 Months Ended

Dec. 31, 2017

Self Insurance and Retained Loss Reserves [Abstract]

Summary of the changes in the reserves for self-insurance and the retained losses

The following is a summary of the changes in the reserves for self-insurance and the retained losses (in millions):



	Year Ended December 31,
	2017			2016			2015
Balance at beginning of period	$	43.1		$	36.1		$	33.3
Net payments	(85.2		)	(76.5		)	(66.3		)
Expense	87.4			83.5			69.1
Balance at end of period	$	45.3		$	43.1		$	36.1

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Schedule of long-term debt

Long-term debt consisted of the following (in millions):



				December 31,
	Interest Rate*		Maturity	2017			2016
Term Loan B-2	Adjusted LIBOR	+ 3.1875%	March 11, 2021	$	—		$	1,082.7
Term Loan B-3	Adjusted LIBOR	+ 3.50%	March 9, 2023	—			1,339.9
Term Loan B-4	Adjusted LIBOR	+ 2.25%	March 11, 2021	711.3			—
Term Loan B-5	Adjusted LIBOR	+ 2.50%	March 9, 2023	1,041.6			—
Revolving credit facility	Adjusted LIBOR	+ 2.0%	March 9, 2021	—			80.5
Senior notes		5.125%	June 1, 2025	950.0			—
Canadian line of credit	CAD Prime	+ 0.50%	Repayable upon demand	—			—
Total debt				2,702.9			2,503.1
Unamortized debt issuance costs/discounts				(22.8		)	(32.8		)
Current portion of long-term debt				(12.4		)	(105.2		)
Long-term debt				$	2,667.7		$	2,365.1

Schedule of aggregate future principal payments on long-term debt

At December 31, 2017, aggregate future principal payments on long-term debt are as follows (in millions):



2018	$	12.4
2019	17.7
2020	17.7
2021	702.4
2022	10.5
Thereafter	1,942.2
	$	2,702.9

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Financial Instruments [Abstract]

Schedule of the fair value of the entity's interest rate derivatives included in the consolidated balance sheet

The following table presents the fair value of our interest rate derivatives included in the consolidated balance sheets for the periods presented (in millions):

Asset Derivatives

December 31, 2017

December 31, 2016

Derivatives Not Designated as Hedging Instruments

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

2017 Interest rate caps

Other assets

$

2.6

Other assets

N/A

2015 Interest rate caps

Other assets

N/A

Other assets

$

—

Schedule of other derivatives not designated as hedging instruments, statements of financial performance

The following table presents the effect of the interest rate derivatives on our consolidated statements of income for the periods presented (in millions):



	Location of Gain / (Loss) Recognized in Income on Derivatives	Amount of Gain / (Loss) Recognized in Income on Derivatives
		Year Ended December 31,
Derivatives Not Designated as Hedging Instruments		2017		2016			2015
2017 Interest rate caps	Interest expense	$	0.8	N/A			N/A
2015 Interest rate caps	Interest expense	—		$	(0.7	)	$	(1.5	)

Leasing Agreements (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of future minimum lease payments for non-cancellable operating and capital leases with terms in excess of one year (excluding renewal periods)

Total future minimum lease payments for non-cancelable operating and capital leases with terms in excess of one year (excluding renewal periods) as of December 31, 2017 are as follows (in millions):



	Operating Leases		Capital Leases
2018	$	133.3	$	27.8
2019	126.0		19.3
2020	114.1		10.0
2021	105.9		0.3
2022	96.9		—
Thereafter	674.9		—
	$	1,251.1	$	57.4
Less: interest portion of capital leases			2.6
Total			$	54.8

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of components of income before income taxes

The components of our income before income taxes and the provision for income taxes are as follows (in millions):



	Year Ended December 31,
	2017			2016			2015
Income before income taxes:
Domestic	$	290.4		$	265.8		$	259.5
Foreign	107.6			89.5			81.0
Total	$	398.0		$	355.3		$	340.5
Income tax expense (benefit):
Current:
Federal	$	89.1		$	100.1		$	88.6
Foreign	30.3			22.9			22.6
State	10.1			14.1			9.7
Total current provision	129.5			137.1			120.9
Deferred:
Federal	(96.1		)	(1.6		)	6.5
Foreign	(3.6		)	(2.4		)	(1.8		)
State	6.2			(0.2		)	0.3
Total deferred provision	(93.5		)	(4.2		)	5.0
Income tax expense	$	36.0		$	132.9		$	125.9

Schedule of components of the provision for income taxes

The provision for income taxes was different from the U.S. federal statutory rate applied to income before taxes, and is reconciled as follows:



	Year Ended December 31,
	2017		2016		2015
Statutory rate	35.0	%	35.0	%	35.0	%
State and local income taxes, net	2.3	%	2.4	%	2.1	%
Reserves for tax exposures	(0.1	)%	(0.2	)%	0.3	%
Change in valuation allowance	(0.6	)%	0.6	%	0.3	%
International operations	(3.1	)%	(0.8	)%	(1.2	)%
Stock-based compensation	(1.6	)%	—	%	—	%
Impact of law and rate change	(23.2	)%	—	%	—	%
Other, net	0.3	%	0.4	%	0.5	%
Effective rate	9.0	%	37.4	%	37.0	%

Schedule of deferred tax assets (liabilities)

Deferred tax assets (liabilities) are comprised of the following at December 31 (in millions):



	2017			2016
Gross deferred tax assets:
Allowances for trade and finance receivables	$	5.8		$	9.1
Accruals and liabilities	50.5			62.6
Employee benefits and compensation	22.7			30.6
Net operating loss carryforwards	38.7			25.1
Investment basis difference	(2.1		)	4.1
Other	9.6			11.6
Total deferred tax assets	125.2			143.1
Deferred tax asset valuation allowance	(28.1		)	(26.4		)
Total	97.1			116.7
Gross deferred tax liabilities:
Property and equipment	(94.3		)	(120.0		)
Goodwill and intangible assets	(179.6		)	(274.6		)
Other	(15.9		)	(13.8		)
Total	(289.8		)	(408.4		)
Net deferred tax liabilities	$	(192.7	)	$	(291.7	)

Schedule of expirations of gross tax benefit from state and federal net operating loss carryforwards

The tax benefit from state and federal net operating loss carryforwards expires as follows (in millions):



2018	$	0.4
2019	0.3
2020	0.8
2021	0.8
2022	0.1
2023 to 2037	36.3
	$	38.7

Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):



	December 31,
	2017			2016
Balance at beginning of period	$	14.0		$	14.9
Increase in prior year tax positions	0.2			1.2
Decrease in prior year tax positions	—			—
Increase in current year tax positions	1.6			1.4
Settlements	—			—
Lapse in statute of limitations	(4.1		)	(3.5		)
Balance at end of period	$	11.7		$	14.0

Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2017

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of accumulated other comprehensive income (loss)

Accumulated other comprehensive loss consisted of the following (in millions):



	December 31,
	2017			2016
Foreign currency translation loss	$	(25.3	)	$	(49.4	)
Unrealized gain on postretirement benefit obligation, net of tax	0.1			0.1
Accumulated other comprehensive loss	$	(25.2	)	$	(49.3	)

Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of financial information regarding the entity's reportable segments

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2017 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,937.5		$	1,219.2		$	301.3		$	—		$	3,458.0
Operating expenses
Cost of services (exclusive of depreciation and amortization)	1,123.9			778.1			85.2			—			1,987.2
Selling, general and administrative	360.0			107.1			30.9			142.2			640.2
Depreciation and amortization	113.1			93.1			31.3			27.1			264.6
Total operating expenses	1,597.0			978.3			147.4			169.3			2,892.0
Operating profit (loss)	340.5			240.9			153.9			(169.3		)	566.0
Interest expense	1.2			—			43.6			119.2			164.0
Other (income) expense, net	(0.3		)	(0.9		)	—			(0.7		)	(1.9		)
Loss on extinguishment of debt	—			—			—			27.5			27.5
Gain on previously held equity interest value	(21.6		)	—			—			—			(21.6		)
Intercompany expense (income)	47.4			37.8			(20.2		)	(65.0		)	—
Income (loss) before income taxes	313.8			204.0			130.5			(250.3		)	398.0
Income taxes	52.9			38.0			26.6			(81.5		)	36.0
Net income (loss)	$	260.9		$	166.0		$	103.9		$	(168.8	)	$	362.0
Total assets	$	3,132.3		$	1,438.4		$	2,315.6		$	98.0		$	6,984.3
Capital expenditures	$	66.9		$	51.6		$	6.1		$	27.6		$	152.2

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2016 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,765.3		$	1,098.0		$	286.8		$	—		$	3,150.1
Operating expenses
Cost of services (exclusive of depreciation and amortization)	1,036.5			708.0			82.9			—			1,827.4
Selling, general and administrative	327.0			104.2			28.7			123.2			583.1
Depreciation and amortization	100.0			87.9			31.1			21.6			240.6
Total operating expenses	1,463.5			900.1			142.7			144.8			2,651.1
Operating profit (loss)	301.8			197.9			144.1			(144.8		)	499.0
Interest expense	0.1			—			34.1			104.6			138.8
Other (income) expense, net	(0.5		)	(0.6		)	—			0.6			(0.5		)
Loss on extinguishment of debt	—			—			1.4			4.0			5.4
Intercompany expense (income)	52.6			38.1			(33.8		)	(56.9		)	—
Income (loss) before income taxes	249.6			160.4			142.4			(197.1		)	355.3
Income taxes	92.7			59.3			54.0			(73.1		)	132.9
Net income (loss)	$	156.9		$	101.1		$	88.4		$	(124.0	)	$	222.4
Total assets	$	2,898.0		$	1,358.9		$	2,213.8		$	86.9		$	6,557.6
Capital expenditures	$	74.8		$	41.1		$	7.3		$	31.9		$	155.1

Financial information regarding our reportable segments is set forth below for the year ended December 31, 2015 (in millions):



	ADESA Auctions			IAA			AFC			Holding Company			Consolidated
Operating revenues	$	1,427.8		$	994.4		$	268.4		$	—		$	2,690.6
Operating expenses
Cost of services (exclusive of depreciation and amortization)	836.9			633.6			78.0			—			1,548.5
Selling, general and administrative	276.6			98.1			27.8			99.5			502.0
Depreciation and amortization	86.2			80.8			30.8			15.0			212.8
Total operating expenses	1,199.7			812.5			136.6			114.5			2,263.3
Operating profit (loss)	228.1			181.9			131.8			(114.5		)	427.3
Interest expense	0.7			—			24.1			66.6			91.4
Other (income) expense, net	(1.7		)	(1.7		)	(1.5		)	0.3			(4.6		)
Intercompany expense (income)	57.6			38.4			(25.3		)	(70.7		)	—
Income (loss) before income taxes	171.5			145.2			134.5			(110.7		)	340.5
Income taxes	62.3			52.4			51.3			(40.1		)	125.9
Net income (loss)	$	109.2		$	92.8		$	83.2		$	(70.6	)	$	214.6
Total assets	$	2,390.9		$	1,292.1		$	2,025.0		$	63.5		$	5,771.5
Capital expenditures	$	70.0		$	40.4		$	7.0		$	17.3		$	134.7

Schedule of information regarding the geographic areas of entity's operations

Most of our operations outside the U.S. are in Canada. Information regarding the geographic areas of our operations is set forth below (in millions):



	Year Ended December 31,
	2017		2016		2015
Operating revenues
U.S.	$	3,010.3	$	2,737.6	$	2,337.9
Foreign	447.7		412.5		352.7
	$	3,458.0	$	3,150.1	$	2,690.6



	December 31,
	2017		2016
Long-lived assets
U.S.	$	3,452.4	$	3,447.5
Foreign	394.5		268.9
	$	3,846.9	$	3,716.4

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial data

Information for any one quarterly period is not necessarily indicative of the results that may be expected for the year.



2017 Quarter Ended	March 31			June 30			Sept. 30			Dec. 31
Operating revenues	$	866.6		$	858.0		$	843.0		$	890.4
Operating expenses
Cost of services (exclusive of depreciation and amortization)	501.2			481.7			479.2			525.1
Selling, general, and administrative	157.4			154.6			155.7			172.5
Depreciation and amortization	64.5			64.5			66.2			69.4
Total operating expenses	723.1			700.8			701.1			767.0
Operating profit	143.5			157.2			141.9			123.4
Interest expense	40.3			40.1			41.5			42.1
Other (income) expense, net	(0.1		)	(1.5		)	(0.1		)	(0.2		)
Loss on extinguishment of debt	—			27.5			—			—
Gain on previously held equity investment value	—			—			—			(21.6		)
Income before income taxes	103.3			91.1			100.5			103.1
Income taxes	34.1			33.9			37.7			(69.7		)
Net income	$	69.2		$	57.2		$	62.8		$	172.8
Basic net income per share of common stock	$	0.51		$	0.42		$	0.46		$	1.28
Diluted net income per share of common stock	$	0.50		$	0.41		$	0.46		$	1.27



2016 Quarter Ended	March 31			June 30			Sept. 30		Dec. 31
Operating revenues	$	758.3		$	788.5		$	789.6	$	813.7
Operating expenses
Cost of services (exclusive of depreciation and amortization)	432.0			447.6			459.5		488.3
Selling, general, and administrative	141.1			146.9			146.3		148.8
Depreciation and amortization	56.4			59.0			60.5		64.7
Total operating expenses	629.5			653.5			666.3		701.8
Operating profit	128.8			135.0			123.3		111.9
Interest expense	28.7			35.8			36.3		38.0
Other (income) expense, net	(1.3		)	(0.3		)	0.8		0.3
Loss on extinguishment of debt	4.0			—			—		1.4
Income before income taxes	97.4			99.5			86.2		72.2
Income taxes	36.7			37.7			31.8		26.7
Net income	$	60.7		$	61.8		$	54.4	$	45.5
Basic net income per share of common stock	$	0.44		$	0.45		$	0.39	$	0.33
Diluted net income per share of common stock	$	0.44		$	0.44		$	0.39	$	0.33

Organization and Other Matters (Details) $ in Millions	Mar. 09, 2016 USD ($)	Mar. 11, 2014 USD ($)	Dec. 31, 2017 USD ($) location network provider	May 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Organization and Other Matters
Long-term debt			$ 2,702.9		$ 2,503.1
ADESA Auctions
Organization and Other Matters
Number of sites for whole car auctions \| network			75
Ranking of largest providers of used vehicle auctions and related services \| provider			2
IAA
Organization and Other Matters
Number of sites for salvage vehicle auctions \| network			175
HBC
Organization and Other Matters
Number of sites for salvage vehicle auctions \| network			11
AFC
Organization and Other Matters
Number of floorplan financing locations \| location			128
Term Loan B-2
Organization and Other Matters
Long-term debt			$ 0.0		1,082.7
Term Loan B-3
Organization and Other Matters
Long-term debt			$ 0.0		1,339.9
Senior Notes
Organization and Other Matters
Senior notes stated interest rate			5.125%	5.125%
Long-term debt			$ 950.0	$ 950.0	0.0
Credit Agreement \| Term Loan B-1
Organization and Other Matters
Term of debt instrument		3 years
Credit Agreement \| Term Loan B-2
Organization and Other Matters
Term of debt instrument		7 years
Credit Agreement \| Term Loan B-3
Organization and Other Matters
Term of debt instrument	7 years
Credit Agreement \| Senior secured revolving credit facility
Organization and Other Matters
Maximum borrowing capacity			350.0	$ 350.0
Long-term debt			$ 0.0
Credit Agreement \| 2016 Revolving credit facility
Organization and Other Matters
Maximum borrowing capacity	$ 300.0
Term of debt instrument	5 years
Long-term debt					$ 80.5
Credit Agreement \| 2014/2015 Revolving credit facility
Organization and Other Matters
Maximum borrowing capacity		$ 250.0
Term of debt instrument		5 years

Summary of Significant Accounting Policies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) item segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Summary of Significant Accounting Policies
Reclassification to cash flows provided by operating activities	$ 588.8	$ 378.0	$ 482.1
Reclassification from cash flows (used by) provided by financing activities	$ (107.6)	436.0	87.4
Business Segments
Number of operating segments \| segment	3
Derivative Instruments and Hedging Activity
Number of interest rate caps \| item	4
Foreign Currency Translation
Foreign currency transaction gain (loss)	$ 0.8	(0.7)	(1.0)
Accounts Payable
Book overdrafts	$ 162.7	154.4
Income Taxes
Recognized income tax positions measured at largest amount greater than specified percentage being realized	50.00%
Revenue Recognition
Provision for credit losses	$ (33.9)	(30.7)	(16.0)
AFC Revenue	$ 301.3	286.8	268.4
PWI average term of contracts originated	1 year 8 months
PWI unearned revenue	$ 32.8
AFC
Revenue Recognition
Interest and fee income	290.3	275.1	246.8
Other revenue	11.8	10.3	9.7
Provision for credit losses	(33.9)	(30.7)	(16.0)
Other service revenue	33.1	32.1	27.9
AFC Revenue	$ 301.3	286.8	268.4
Period to define financing receivables as past due (in days)	31 days
Minimum
Revenue Recognition
Period to define financing receivables as past due (in days)	31 days
Floorplan receivables \| Minimum
Receivables
Predetermined time period for financing receivables to become due	30 days
Floorplan receivables \| Maximum
Receivables
Predetermined time period for financing receivables to become due	90 days
AFC Funding Corporation
Restricted Cash
Cash reserve as security for the receivables sold (as a percent)	1.00%
AFC Funding Corporation \| Minimum
Restricted Cash
Cash reserve as security for the receivables sold (as a percent)	1.00%
AFCI
Restricted Cash
Cash reserve as security for the receivables sold (as a percent)	1.00%
AFCI \| Minimum
Restricted Cash
Cash reserve as security for the receivables sold (as a percent)	1.00%
Adjustments from adoption of ASU 2016-09
Summary of Significant Accounting Policies
Reclassification to cash flows provided by operating activities		17.2	7.1
Reclassification from cash flows (used by) provided by financing activities		$ 17.2	$ 7.1
Recognition of excess tax benefits from stock-based compensation in income tax expense	$ 6.4

Acquisitions (Details) $ in Millions	3 Months Ended								12 Months Ended
Acquisitions (Details) $ in Millions	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 03, 2017 USD ($)	Apr. 01, 2016 USD ($) network
Acquisitions
Equity method investment, ownership percentage												50.00%
Operating revenues	$ 890.4	$ 843.0	$ 858.0	$ 866.6	$ 813.7	$ 789.6	$ 788.5	$ 758.3	$ 3,458.0	$ 3,150.1	$ 2,690.6
Purchase price for the acquired business allocated to intangible assets	689.3				621.7				689.3	621.7
Goodwill	2,191.7				2,057.0				2,191.7	2,057.0	1,795.9
TradeRev
Acquisitions
Initial annual lease payments for facilities												$ 1.8
Brasher's
Acquisitions
Number of sites for whole car auctions \| network													8
Operating revenues											$ 140.0
Initial annual lease payments for facilities													$ 5.0
Series of individually immaterial business acquisitions
Acquisitions
Purchase price for business acquired	103.9				433.4				103.9	433.4
Fair value of deferred payments	6.6								6.6
Fair value of estimated contingent payments	24.0				1.3				24.0	1.3
Maximum amount of undiscounted contingent payments related to acquisitions	60.0				1.5				60.0	1.5
Purchase price for the acquired business allocated to intangible assets	29.4				136.8				29.4	136.8
Goodwill	130.7				269.6				130.7	269.6
Customer relationships \| Series of individually immaterial business acquisitions
Acquisitions
Purchase price for the acquired business allocated to intangible assets	3.1				129.8				3.1	129.8
Computer software & technology
Acquisitions
Purchase price for the acquired business allocated to intangible assets	470.9				404.8				470.9	404.8
Computer software & technology \| Series of individually immaterial business acquisitions
Acquisitions
Purchase price for the acquired business allocated to intangible assets	24.0				4.9				24.0	4.9
Tradenames \| Series of individually immaterial business acquisitions
Acquisitions
Purchase price for the acquired business allocated to intangible assets	2.3				1.8				2.3	1.8
Covenants not to compete
Acquisitions
Purchase price for the acquired business allocated to intangible assets	$ 15.0				15.8				$ 15.0	15.8
Covenants not to compete \| Series of individually immaterial business acquisitions
Acquisitions
Purchase price for the acquired business allocated to intangible assets					$ 0.3					$ 0.3

Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 03, 2017	Aug. 05, 2014
Equity Method Investments
Equity method investment, ownership percentage														50.00%
Other (income) expense, net	$ (0.2)	$ (0.1)	$ (1.5)	$ (0.1)	$ 0.3	$ 0.8	$ (0.3)	$ (1.3)		$ (1.9)	$ (0.5)	$ (4.6)
Equity method investment, carrying value														$ 18.4
Gain on previously held equity interest value	$ 21.6	0.0	$ 0.0	$ 0.0						$ 21.6	0.0	0.0
TradeRev
Equity Method Investments
Equity method investment, difference between carrying amount and underlying equity															$ 21.8
Other (income) expense, net									$ 4.4		$ 3.8	$ 0.8
Borrowing increment for equity investee promissory note		5.0							5.0
Principal outstanding on equity investee promissory note									5.0
TradeRev \| Minimum
Equity Method Investments
Useful lives													6 years
TradeRev \| Maximum
Equity Method Investments
Useful lives													14 years
Borrowing capacity for equity investee promissory note		$ 15.0							$ 15.0
Amortizable intangible assets \| TradeRev
Equity Method Investments
Equity method investment, difference between carrying amount and underlying equity															$ 4.8

Stock and Stock-Based Compensation Plan Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock and Stock-Based Compensation Plans
Stock-based compensation expense (in dollars)	$ 24.2	$ 18.1	$ 11.7
Total income tax benefit recognized (in dollars)	6.1	6.9	4.4
PRSUs
Stock and Stock-Based Compensation Plans
Stock-based compensation expense (in dollars)	13.2	10.3	6.1
RSUs
Stock and Stock-Based Compensation Plans
Stock-based compensation expense (in dollars)	9.5	5.9	2.5
Service options
Stock and Stock-Based Compensation Plans
Stock-based compensation expense (in dollars)	$ 1.5	$ 1.9	$ 3.1

KAR Auction Services, Inc. Stock-Based Compensation Plans (Details) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2014 $ / shares shares	Dec. 31, 2017 USD ($) installment $ / shares shares	Dec. 31, 2016 installment $ / shares shares	Dec. 31, 2015 installment $ / shares shares	Dec. 31, 2014 installment $ / shares shares	Dec. 31, 2010	Dec. 31, 2009
KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Maximum number of shares to be issued pursuant to awards		12,500,000
KAR Auction Services Inc Stock Incentive Plan
Stock and Stock-Based Compensation Plans
Maximum number of shares to be issued pursuant to awards		7,900,000
Number of types of stock options							2
PRSUs \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Unrecognized compensation expense related to nonvested PRSUs and/or RSUs (in dollars) \| $		$ 9.6
Weighted average term for recognizing unrecognized compensation expense		1 year 8 months
PRSUs and/or RSUs grants	100,000
PRSUs - total shareholder return \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Percent of PRSUs that vest	50.00%
PRSUs vesting period	3 years
PRSUs and/or RSUs grant date fair value \| $ / shares	$ 36.54
PRSUs - adjusted EPS \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Percent of PRSUs that vest	50.00%
PRSUs vesting period	3 years			3 years
PRSUs and/or RSUs grants				200,000
PRSUs and/or RSUs grant date fair value \| $ / shares	$ 30.89			$ 37.03
PRSUs - Operating Adjusted EPS \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
PRSUs vesting period		3 years	3 years
PRSUs and/or RSUs grants		200,000	300,000
PRSUs and/or RSUs grant date fair value \| $ / shares		$ 44.64	$ 34.94
RSUs
Stock and Stock-Based Compensation Plans
RSUs outstanding weighted average grant date fair value \| $ / shares		$ 40.18	$ 35.67
RSUs outstanding at the beginning of period (in shares)		417,712
PRSUs and/or RSUs grants		299,955
Vested (in shares)		(163,221)
Vested (in dollars per share) \| $ / shares		$ 35.92
Forfeited (in shares)		(23,228)
RSUs outstanding at the end of period (in shares)		531,218	417,712
PRSUs and/or RSUs grant date fair value \| $ / shares		$ 44.03
Forfeited (in dollars per share) \| $ / shares		$ 38.99
RSUs \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Unrecognized compensation expense related to nonvested PRSUs and/or RSUs (in dollars) \| $		$ 12.3
Weighted average term for recognizing unrecognized compensation expense		1 year 11 months
Number of equal annual installments \| installment		3	3	3
PRSUs and/or RSUs grants		300,000	300,000	300,000
PRSUs and/or RSUs grant date fair value \| $ / shares		$ 44.03	$ 34.91	$ 37.04
Service options
Stock and Stock-Based Compensation Plans
Options granted (in shares)		0
Service options \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Weighted average term for recognizing unrecognized compensation expense		2 months
Number of equal annual installments \| installment					4
Options granted (in shares)					900,000
Weighted average exercise price of options granted (in dollars per share) \| $ / shares					$ 30.06
Term of award					10 years
Period of commencement of vesting of awards / anniversary					1
Service options \| KAR Auction Services Inc Stock Incentive Plan
Stock and Stock-Based Compensation Plans
Term of award							10 years
Exit options
Stock and Stock-Based Compensation Plans
Options granted (in shares)		0
Exit options \| KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan
Stock and Stock-Based Compensation Plans
Term of award						10 years
Exit options \| KAR Auction Services Inc Stock Incentive Plan
Stock and Stock-Based Compensation Plans
Term of award							10 years

Service and Exit Options (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2010	Dec. 31, 2009
Number of Options
Outstanding at the beginning of the period (in shares)	2,700,000	4,000,000
Outstanding at the end of the period (in shares)	1,900,000	2,700,000	4,000,000
Service options
Stock and Stock-Based Compensation Plans
Fair value of vested and exercisable options (in dollars) \| $	$ 55.3	$ 49.0
Number of Options
Outstanding at the beginning of the period (in shares)	1,687,925
Granted (in shares)	0
Exercised (in shares)	(303,062)
Forfeited (in shares)	(5,000)
Outstanding at the end of the period (in shares)	1,379,589	1,687,925
Exercisable at the end of the period (in shares)	1,095,427
Canceled (in shares)	274
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) \| $ / shares	$ 22.59
Exercised (in dollars per share) \| $ / shares	18.31
Forfeited (in dollars per share) \| $ / shares	25.80
Canceled (in dollars per share) \| $ / shares	10.00
Outstanding at the end of the period (in dollars per share) \| $ / shares	23.54	$ 22.59
Exercisable at the end of the period (in dollars per share) \| $ / shares	$ 21.87
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	5 years 1 month
Exercisable at the end of the period	4 years 9 months
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) \| $	$ 37.2
Exercisable at the end of the period (in dollars) \| $	$ 31.4
Closing stock price (in dollars per share) \| $ / shares	$ 50.51
Total intrinsic value of options exercised (in dollars) \| $	$ 8.1	$ 9.6	$ 11.0
Exit options
Stock and Stock-Based Compensation Plans
Fair value of vested and exercisable options (in dollars) \| $	$ 27.6	$ 42.2
Number of Options
Outstanding at the beginning of the period (in shares)	991,276
Granted (in shares)	0
Exercised (in shares)	(444,877)
Forfeited (in shares)	0
Outstanding at the end of the period (in shares)	545,576	991,276
Exercisable at the end of the period (in shares)	545,576
Canceled (in shares)	823
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) \| $ / shares	$ 11.90
Exercised (in dollars per share) \| $ / shares	11.23
Canceled (in dollars per share) \| $ / shares	10.00
Outstanding at the end of the period (in dollars per share) \| $ / shares	12.46	$ 11.90
Exercisable at the end of the period (in dollars per share) \| $ / shares	$ 12.46
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	1 year 9 months
Exercisable at the end of the period	1 year 9 months
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) \| $	$ 20.8
Exercisable at the end of the period (in dollars) \| $	$ 20.8
Closing stock price (in dollars per share) \| $ / shares	$ 50.51
Total intrinsic value of options exercised (in dollars) \| $	$ 14.7	$ 23.8	$ 35.9
KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan \| Service options
Stock and Stock-Based Compensation Plans
Unrecognized compensation expense related to nonvested options (in dollars) \| $	$ 0.3
Weighted average term for recognizing unrecognized compensation expense	2 months
Number of Options
Granted (in shares)				900,000
Weighted Average Exercise Price
Granted (in dollars per share) \| $ / shares				$ 30.06
Aggregate Intrinsic Value
Term of award				10 years
KAR Auction Services, Inc. 2009 Omnibus Stock and Incentive Plan \| Exit options
Aggregate Intrinsic Value
Term of award					10 years
KAR Auction Services Inc Stock Incentive Plan
Stock and Stock-Based Compensation Plans
Number of types of stock options						2
KAR Auction Services Inc Stock Incentive Plan \| Service options
Aggregate Intrinsic Value
Term of award						10 years
KAR Auction Services Inc Stock Incentive Plan \| Exit options
Aggregate Intrinsic Value
Term of award						10 years

Employee Stock Purchase Plan (Details) - KAR Auction Services, Inc. Employee Stock Purchase Plan	12 Months Ended
	Dec. 31, 2017 USD ($) shares
Stock and Stock-Based Compensation Plans
Maximum number of shares to be issued pursuant to awards	1,000,000
Remaining shares available for purchase	465,020
Discount from fair market value of share (as a percent)	15.00%
Maximum
Stock and Stock-Based Compensation Plans
Participant's combined payroll deductions and cash payments (in dollars) \| $	$ 25,000

Share Repurchase Plan (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended	6 Months Ended	12 Months Ended
	Oct. 26, 2016	Jan. 11, 2016	Oct. 29, 2014	Sep. 30, 2015	Jan. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Additional disclosures
Common stock, par value (in dollars per share)						$ 0.01	$ 0.01
October 2014 Share Repurchase Program
Additional disclosures
Stock repurchase program, authorized amount			$ 300
Stock repurchase program expiration date			Oct. 28, 2016
Stock repurchased and retired during period (in shares)							0	744,900
Stock repurchased and retired weighted average price per share								$ 37.04
Accelerated share repurchase agreement repurchases
Additional disclosures
Stock repurchased and retired during period (in shares)		800,000		4,600,000	5,413,274
Stock repurchased and retired weighted average price per share					$ 36.95
Stock repurcahsed and retired during period under accelerated share repurchase agreement				$ 200
Percent of stock repurchased under accelerated share repurchase agreement				90.00%
October 2016 Share Repurchase Authorization
Additional disclosures
Stock repurchase program, authorized amount	$ 500
Stock repurchase program expiration date	Oct. 26, 2019
Stock repurchased and retired during period (in shares)						3,279,089	1,931,200
Stock repurchased and retired weighted average price per share						$ 45.74	$ 41.61

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share, Basic and Diluted [Abstract]
Net Income	$ 172.8	$ 62.8	$ 57.2	$ 69.2	$ 45.5	$ 54.4	$ 61.8	$ 60.7	$ 362.0	$ 222.4	$ 214.6
Shares outstanding
Weighted average common shares outstanding									136.3	137.6	140.1
Effect of dilutive stock options and restricted stock awards (in shares)									1.7	1.5	2.2
Weighted average common shares outstanding and potential common shares									138.0	139.1	142.3
Net income per share
Basic (in dollars per share)	$ 1.28	$ 0.46	$ 0.42	$ 0.51	$ 0.33	$ 0.39	$ 0.45	$ 0.44	$ 2.66	$ 1.62	$ 1.53
Diluted (in dollars per share)	$ 1.27	$ 0.46	$ 0.41	$ 0.50	$ 0.33	$ 0.39	$ 0.44	$ 0.44	$ 2.62	$ 1.60	$ 1.51
Shares attributable to stock options excluded from the calculation of diluted net income per share									0.0	0.0	0.0
Securities excluded from calculation of earnings per share amount due to performance conditions not yet satisfied									0.5	0.5	0.3
Stock options outstanding (in shares)	1.9				2.7				1.9	2.7	4.0

Allowance for Credit Losses and Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes in the allowance for credit losses
Balance at beginning of period	$ 12.0	$ 9.0	$ 8.0
Provision for credit losses	33.9	30.7	16.0
Recoveries	5.3	4.2	4.1
Less charge-offs	(38.2)	(31.9)	(19.1)
Balance at end of period	$ 13.0	$ 12.0	$ 9.0

Allowance for Credit Losses and Doubtful Accounts (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes in the allowance for doubtful accounts
Balance at beginning of period	$ 13.0	$ 6.6	$ 6.3
Provision for credit losses	4.6	9.8	2.8
Less net charge-offs	(6.4)	(3.4)	(2.5)
Balance at end of period	$ 11.2	$ 13.0	$ 6.6

Finance Receivables and Obligations Collateralized by Finance Receivables (Details) CAD in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 CAD	Dec. 20, 2016 USD ($)	Dec. 31, 2014 USD ($)
Finance Receivables and Obligations Collateralized by Finance Receivables
Obligations collateralized by finance receivables, gross	$ 1,371.4				$ 1,300.0				$ 1,371.4	$ 1,300.0
Cost capitalized in connection with US/Canada RPA									22.6	32.8	$ 10.9
Loss on extinguishment of debt	0.0	$ 0.0	$ 27.5	$ 0.0	1.4	$ 0.0	$ 0.0	$ 4.0	27.5	5.4	0.0
Principal Amount of Receivables	1,912.6				1,792.2				1,912.6	1,792.2
Principal Amount of Receivables Delinquent	12.1				12.0				12.1	12.0
Net Credit Losses									32.9	27.7
Allowance for losses	13.0				12.0				13.0	12.0	$ 9.0			$ 8.0
Finance receivables pledged as security	1,893.2				1,774.8				1,893.2	1,774.8
Obligations collateralized by finance receivables	1,358.1				1,280.3				$ 1,358.1	1,280.3
Minimum
Finance Receivables and Obligations Collateralized by Finance Receivables
Period to define financing receivables as past due (in days)									31 days
Floorplan receivables
Finance Receivables and Obligations Collateralized by Finance Receivables
Principal Amount of Receivables	1,901.1				1,781.1				$ 1,901.1	1,781.1
Principal Amount of Receivables Delinquent	12.1				12.0				12.1	12.0
Net Credit Losses									32.9	27.7
Other Loans
Finance Receivables and Obligations Collateralized by Finance Receivables
Principal Amount of Receivables	11.5				11.1				11.5	11.1
Principal Amount of Receivables Delinquent	0.0				0.0				0.0	0.0
Net Credit Losses									0.0	0.0
AFC
Finance Receivables and Obligations Collateralized by Finance Receivables
Allowance for losses	13.0				12.0				13.0	12.0
Unamortized debt issuance costs	(13.3)				$ (19.7)				$ (13.3)	(19.7)
AFC \| Minimum
Finance Receivables and Obligations Collateralized by Finance Receivables
Period to define financing receivables as past due (in days)									31 days
AFC Funding Corporation
Finance Receivables and Obligations Collateralized by Finance Receivables
Committed liquidity	$ 1,500.0								$ 1,500.0				$ 1,250.0
Loss on extinguishment of debt										1.4
Cash reserve as security for obligations of collateralized financing receivables (as a percent)									1.00%
AFC Funding Corporation \| Minimum
Finance Receivables and Obligations Collateralized by Finance Receivables
Cash reserve as security for obligations of collateralized financing receivables (as a percent)									1.00%
AFCI
Finance Receivables and Obligations Collateralized by Finance Receivables
Committed liquidity \| CAD												CAD 125
Cost capitalized in connection with US/Canada RPA										0.7
Cash reserve as security for obligations of collateralized financing receivables (as a percent)									1.00%
AFCI \| Minimum
Finance Receivables and Obligations Collateralized by Finance Receivables
Cash reserve as security for obligations of collateralized financing receivables (as a percent)									1.00%
December 2016 AFC RPA \| AFC
Finance Receivables and Obligations Collateralized by Finance Receivables
Cost capitalized in connection with US/Canada RPA										12.7
March 2016 AFC RPA Amendment \| AFC
Finance Receivables and Obligations Collateralized by Finance Receivables
Cost capitalized in connection with US/Canada RPA										$ 0.8

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Changes in goodwill
Balance at the beginning of the year	$ 2,057.0	$ 1,795.9
Increase for acquisition activity	130.7	269.6
Other	4.0	(8.5)
Balance at the end of the year	2,191.7	2,057.0
ADESA Auctions
Changes in goodwill
Balance at the beginning of the year	1,256.9	1,039.4
Increase for acquisition activity	130.7	224.1
Other	2.8	(6.6)
Balance at the end of the year	1,390.4	1,256.9
IAA
Changes in goodwill
Balance at the beginning of the year	536.4	537.5
Increase for acquisition activity	0.0	0.8
Other	1.2	(1.9)
Balance at the end of the year	537.6	536.4
AFC
Changes in goodwill
Balance at the beginning of the year	263.7	219.0
Increase for acquisition activity	0.0	44.7
Other	0.0	0.0
Balance at the end of the year	$ 263.7	$ 263.7

Goodwill and Other Intangible Assets (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Summary of customer relationships
Accumulated amortization	$ (805.0)	$ (707.8)
Carrying value	375.6	461.0
Customer relationships
Summary of customer relationships
Gross carrying amount	1,180.6	1,168.8
Accumulated amortization	(805.0)	(707.8)
Carrying value	$ 375.6	$ 461.0
Customer relationships \| Minimum
Summary of customer relationships
Useful lives	5 years
Customer relationships \| Maximum
Summary of customer relationships
Useful lives	19 years

Goodwill and Other Intangible Assets (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Summary of other intangible assets
Indefinite-lived tradenames	$ 187.5	$ 187.5
Gross carrying amount	689.3	621.7
Accumulated amortization	(338.7)	(301.6)
Carrying value	350.6	320.1
Computer software & technology
Summary of other intangible assets
Gross carrying amount	470.9	404.8
Accumulated amortization	(315.6)	(279.7)
Carrying value	$ 155.3	125.1
Computer software & technology \| Minimum
Summary of other intangible assets
Useful lives	3 years
Computer software & technology \| Maximum
Summary of other intangible assets
Useful lives	13 years
Covenants not to compete
Summary of other intangible assets
Gross carrying amount	$ 15.0	15.8
Accumulated amortization	(14.5)	(15.0)
Carrying value	$ 0.5	0.8
Covenants not to compete \| Minimum
Summary of other intangible assets
Useful lives	1 year
Covenants not to compete \| Maximum
Summary of other intangible assets
Useful lives	5 years
Tradenames
Summary of other intangible assets
Gross carrying amount	$ 203.4	201.1
Accumulated amortization	(8.6)	(6.9)
Carrying value	$ 194.8	$ 194.2
Tradenames \| Minimum
Summary of other intangible assets
Useful lives	2 years

Goodwill and Other Intangible Assets (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets held under capital leases
Amortization expense for customer relationships and other intangibles	$ 162.6	$ 151.0	$ 138.0
Estimated amortization expense
2018	138.6
2019	110.5
2020	75.1
2021	44.9
2022	$ 36.7

Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property and equipment
Property and equipment, gross	$ 1,663.3	$ 1,498.1
Accumulated depreciation	(755.1)	(655.6)
Property and equipment, net	908.2	842.5
Depreciation expense	102.0	89.6	$ 74.8
Land
Property and equipment
Property and equipment, gross	270.9	266.4
Buildings
Property and equipment
Property and equipment, gross	$ 249.5	244.7
Buildings \| Minimum
Property and equipment
Useful lives	5 years
Buildings \| Maximum
Property and equipment
Useful lives	40 years
Land improvements
Property and equipment
Property and equipment, gross	$ 173.8	167.7
Land improvements \| Minimum
Property and equipment
Useful lives	5 years
Land improvements \| Maximum
Property and equipment
Useful lives	20 years
Building and leasehold improvements
Property and equipment
Property and equipment, gross	$ 436.8	384.5
Building and leasehold improvements \| Minimum
Property and equipment
Useful lives	3 years
Building and leasehold improvements \| Maximum
Property and equipment
Useful lives	33 years
Furniture, fixtures and equipment
Property and equipment
Property and equipment, gross	$ 456.4	388.6
Furniture, fixtures and equipment \| Minimum
Property and equipment
Useful lives	1 year
Furniture, fixtures and equipment \| Maximum
Property and equipment
Useful lives	10 years
Vehicles
Property and equipment
Property and equipment, gross	$ 22.3	19.1
Vehicles \| Minimum
Property and equipment
Useful lives	3 years
Vehicles \| Maximum
Property and equipment
Useful lives	10 years
Construction in progress
Property and equipment
Property and equipment, gross	$ 53.6	$ 27.1

Property and Equipment (Details 2) - Furniture, fixtures and equipment - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets held under capital leases
Capital lease assets, gross	$ 180.0	$ 149.2
Accumulated depreciation	(119.2)	(94.2)
Capital lease assets	$ 60.8	$ 55.0

Self Insurance and Retained Loss Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes in the reserves for self-insurance and the retained losses
Balance at beginning of period	$ 43.1	$ 36.1	$ 33.3
Net payments	(85.2)	(76.5)	(66.3)
Expense	87.4	83.5	69.1
Balance at end of period	45.3	43.1	$ 36.1
Individual stop-loss coverage for medical benefits	0.5	0.5
Retention for automobile and general liability claims	1.0	1.0
Retention for workers compensation claims	0.5	0.5
Corridor deductible for workers compensation claims	1.0	1.0
Deductible amount per occurrence after corridor deductible is met	$ 0.5	0.5
Aggregate policy limits for the combined automobile, general liability and workers' compensation program		$ 30.4

Long-Term Debt Summary and Future Principle Payments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	May 31, 2017	Dec. 31, 2016
Long-Term Debt
Total debt	$ 2,702.9		$ 2,503.1
Unamortized debt issuance costs and unamortized debt discounts	(22.8)		(32.8)
Current portion of long-term debt	(12.4)		(105.2)
Long-term debt	$ 2,667.7		$ 2,365.1
Weighted average interest rate on debt (as a percent)	4.15%		4.39%
Future Principal Payments
2018	$ 12.4
2019	17.7
2020	17.7
2021	702.4
2022	10.5
Thereafter	1,942.2
Total	2,702.9
Term Loan B-2
Long-Term Debt
Total debt	$ 0.0		$ 1,082.7
Term Loan B-2 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	3.1875%
Term Loan B-3
Long-Term Debt
Total debt	$ 0.0		1,339.9
Term Loan B-3 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	3.50%
Term Loan B-4
Long-Term Debt
Total debt	$ 711.3		0.0
Term Loan B-4 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	2.25%
Term Loan B-5
Long-Term Debt
Total debt	$ 1,041.6		0.0
Term Loan B-5 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	2.50%
Senior Notes
Long-Term Debt
Total debt	$ 950.0	$ 950.0	0.0
Senior notes stated interest rate	5.125%	5.125%
Term Loan B-4 and Term Loan B-5 aggregate principal
Long-Term Debt
Total debt		$ 1,767.0
Revolving credit facility \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	2.00%
Canadian line of credit
Long-Term Debt
Total debt	$ 0.0		0.0
Canadian line of credit \| CAD Prime
Long-Term Debt
Variable rate basis	CAD Prime
Interest rate basis (as a percent)	0.50%
Credit Agreement \| Term Loan B-4
Long-Term Debt
Total debt		717.0
Credit Agreement \| Term Loan B-5
Long-Term Debt
Total debt		$ 1,050.0
Credit Agreement \| Revolving credit facility
Long-Term Debt
Total debt	$ 0.0
Credit Agreement \| Revolving credit facility \| Adjusted LIBOR
Long-Term Debt
Variable rate basis	Adjusted LIBOR
Interest rate basis (as a percent)	2.00%
Credit Agreement \| 2016 Revolving credit facility
Long-Term Debt
Total debt			$ 80.5

Credit Facilities (Details) $ in Millions		3 Months Ended								12 Months Ended
Credit Facilities (Details) $ in Millions	Mar. 09, 2016 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	May 31, 2017 USD ($)
Long-Term Debt
Long-term debt		$ 2,702.9				$ 2,503.1				$ 2,702.9	$ 2,503.1
Payments on long-term debt										$ (2,436.7)	(662.6)	$ (21.5)
Percentage of equity interests of certain of the company's and the Subsidiary Guarantors' domestic subsidiaries pledged under the Credit Facility										100.00%
Percentage of equity interests of certain of the company's and the Subsidiary Guarantors' first-tier foreign subsidiaries pledged under the Credit Facility										65.00%
Loss on extinguishment of debt		0.0	$ 0.0	$ 27.5	$ 0.0	1.4	$ 0.0	$ 0.0	$ 4.0	$ 27.5	5.4	0.0
Payments for debt issuance costs/amendments										(22.6)	(32.8)	$ (10.9)
Term Loan B-3
Long-Term Debt
Long-term debt		0.0				1,339.9				$ 0.0	1,339.9
Term Loan B-3 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis										Adjusted LIBOR
Interest rate basis (as a percent)										3.50%
Term Loan B-4
Long-Term Debt
Long-term debt		$ 711.3				0.0				$ 711.3	0.0
Quarterly installment payment as a percentage of original aggregate principal amount										0.25%
Net cash proceeds from sale lease-back, percentage										50.00%
Payments on long-term debt										$ (5.7)
Number of scheduled quarterly installments prepaid on Term Loans \| item										8
Interest rate of loan (as a percent)		4.00%								4.00%
Term Loan B-4 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis										Adjusted LIBOR
Interest rate basis (as a percent)										2.25%
Term Loan B-4 \| Base rate
Long-Term Debt
Variable rate basis										Base Rate
Interest rate basis (as a percent)										1.25%
Term Loan B-5
Long-Term Debt
Long-term debt		$ 1,041.6				0.0				$ 1,041.6	0.0
Quarterly installment payment as a percentage of original aggregate principal amount										0.25%
Net cash proceeds from sale lease-back, percentage										50.00%
Payments on long-term debt										$ (8.4)
Number of scheduled quarterly installments prepaid on Term Loans \| item										8
Interest rate of loan (as a percent)		4.25%								4.25%
Term Loan B-5 \| Adjusted LIBOR
Long-Term Debt
Variable rate basis										Adjusted LIBOR
Interest rate basis (as a percent)										2.50%
Term Loan B-5 \| Base rate
Long-Term Debt
Variable rate basis										Base Rate
Interest rate basis (as a percent)										1.50%
Revolving credit facility \| Adjusted LIBOR
Long-Term Debt
Variable rate basis										Adjusted LIBOR
Interest rate basis (as a percent)										2.00%
Letters of credit
Long-Term Debt
Maximum borrowing capacity		$ 75.0								$ 75.0
Outstanding letters of credit		42.8				29.7				42.8	29.7
Swing line loans
Long-Term Debt
Maximum borrowing capacity		90.0								90.0
Credit Agreement
Long-Term Debt
Early termination penalties										0.0	0.0
Loss on extinguishment of debt									$ 4.0	27.5
Payments for debt issuance costs/amendments										(7.8)	(18.0)
Credit Agreement \| Term Loan B-3
Long-Term Debt
Term of debt instrument	7 years
Credit Agreement \| Term Loan B-4
Long-Term Debt
Long-term debt													$ 717.0
Credit Agreement \| Term Loan B-5
Long-Term Debt
Long-term debt													1,050.0
Credit Agreement \| Revolving credit facility
Long-Term Debt
Long-term debt		0.0								$ 0.0
Step up in interest rate (as a percent)										0.25%
Maximum borrowing capacity		350.0								$ 350.0			$ 350.0
Commitment fee on the unused amount of the Credit Facility (as a percent)										0.30%
The commitment fee may step up to this percent										0.35%
Amount borrowed		$ 0.0								$ 0.0
Credit Agreement \| Revolving credit facility \| Adjusted LIBOR
Long-Term Debt
Variable rate basis										Adjusted LIBOR
Interest rate basis (as a percent)										2.00%
Credit Agreement \| Revolving credit facility \| Base rate
Long-Term Debt
Variable rate basis										Base Rate
Interest rate basis (as a percent)										1.00%
Credit Agreement \| 2016 Revolving credit facility
Long-Term Debt
Long-term debt						80.5					80.5
Term of debt instrument	5 years
Maximum borrowing capacity	$ 300.0
Amount borrowed						$ 80.5					$ 80.5

Senior Notes (Details) - USD ($) $ in Millions	12 Months Ended
Senior Notes (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	May 31, 2017
Long-Term Debt
Payments for debt issuance costs/amendments	$ (22.6)	$ (32.8)	$ (10.9)
Senior Notes
Long-Term Debt
Senior notes face amount				$ 950.0
Senior notes stated interest rate	5.125%			5.125%
Senior notes redemption price (as a percent)	100.00%
Payments for debt issuance costs/amendments	$ (14.7)

Other Debt (Details) CAD in Millions, $ in Millions	3 Months Ended								12 Months Ended
Other Debt (Details) CAD in Millions, $ in Millions	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 CAD	Dec. 31, 2016 CAD
Long-Term Debt
Loss on extinguishment of debt \| $	$ 0.0	$ 0.0	$ 27.5	$ 0.0	$ 1.4	$ 0.0	$ 0.0	$ 4.0	$ 27.5	$ 5.4	$ 0.0
Canadian line of credit
Long-Term Debt
Maximum borrowing capacity \| CAD												CAD 8.0
Amount borrowed \| $	$ 0.0				$ 0.0				$ 0.0	$ 0.0
Outstanding letters of credit \| CAD												CAD 1.0	CAD 0.9

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Financial Instruments (Details) $ in Millions						12 Months Ended
Financial Instruments (Details) $ in Millions	Aug. 16, 2017 USD ($) agreement	Apr. 06, 2017 USD ($)	Mar. 31, 2017 USD ($) agreement	Aug. 19, 2015 USD ($) agreement	Apr. 16, 2015 USD ($) agreement	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Aggregate amount paid for interest rate caps						$ 1.7	$ 0.0	$ 2.2
August 2017 interest rate cap
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Number of derivative agreements purchased \| agreement	2
Aggregate amount paid for interest rate caps	$ 1.0
Aggregate notional amount	$ 800.0
Variable rate basis						three-month LIBOR
August 2017 interest rate cap \| Minimum
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Floor rate (as a percent)						2.00%
March 2017 interest rate cap
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Number of derivative agreements purchased \| agreement			2
Aggregate amount paid for interest rate caps		$ 0.7
Aggregate notional amount			$ 400.0
Variable rate basis						three-month LIBOR
March 2017 interest rate cap \| Minimum
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Floor rate (as a percent)						2.00%
Aug 2015 interest rate cap
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Number of derivative agreements purchased \| agreement				3
Aggregate amount paid for interest rate caps				$ 1.5
Aggregate notional amount				$ 800.0
Variable rate basis						three-month LIBOR
Aug 2015 interest rate cap \| Minimum
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Floor rate (as a percent)						2.00%
Change in derivative cap interest rate						1.75%
April 2015 interest rate cap
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Number of derivative agreements purchased \| agreement					2
Aggregate amount paid for interest rate caps					$ 0.7
Aggregate notional amount					$ 400.0
Variable rate basis						three-month LIBOR
April 2015 interest rate cap \| Minimum
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Floor rate (as a percent)						1.50%
Not designated as hedging instrument \| March and August 2017 interest rate caps
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Asset derivatives, fair value						$ 2.6
Not designated as hedging instrument \| April and August 2015 interest rate caps
Fair value of the entity's interest rate derivatives included in the consolidated balance sheet
Asset derivatives, fair value							$ 0.0

Financial Instruments (Details 2) - USD ($) $ in Millions	12 Months Ended
Financial Instruments (Details 2) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Long-term Debt, Unclassified [Abstract]
Estimated fair value of long-term debt	$ 2,735.1	$ 2,528.0
March and August 2017 interest rate caps \| Not designated as hedging instrument
Effect of the interest rate derivatives on the entity's statement of equity and consolidated statement of income
Amount of gain/(loss) recognized in income on derivative	0.8
April and August 2015 interest rate caps \| Not designated as hedging instrument
Effect of the interest rate derivatives on the entity's statement of equity and consolidated statement of income
Amount of gain/(loss) recognized in income on derivative	$ 0.0	$ (0.7)	$ (1.5)

Leasing Agreements (Details) - USD ($) $ in Millions	12 Months Ended
Leasing Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Leases
2018	$ 133.3
2019	126.0
2020	114.1
2021	105.9
2022	96.9
Thereafter	674.9
Total	1,251.1
Capital Leases
2018	27.8
2019	19.3
2020	10.0
2021	0.3
2022	0.0
Thereafter	0.0
Total minimum lease payments, including interest portion of capital leases	57.4
Less: interest portion of capital leases	2.6
Total	54.8
Total lease expense	$ 163.5	$ 134.8	$ 115.0

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal corporate income tax rate (as a percent)									35.00%
Remeasurement of deferred income tax benefit									$ 102.7
Deemed repatriation tax expense									$ 11.1
Subsequent period Federal corporate income tax rate	21.00%								21.00%
Income before income taxes:
Domestic									$ 290.4	$ 265.8	$ 259.5
Foreign									107.6	89.5	81.0
Income before income taxes	$ 103.1	$ 100.5	$ 91.1	$ 103.3	$ 72.2	$ 86.2	$ 99.5	$ 97.4	398.0	355.3	340.5
Current:
Federal									89.1	100.1	88.6
Foreign									30.3	22.9	22.6
State									10.1	14.1	9.7
Total current provision									129.5	137.1	120.9
Deferred:
Federal									(96.1)	(1.6)	6.5
Foreign									(3.6)	(2.4)	(1.8)
State									6.2	(0.2)	0.3
Total deferred provision									(93.5)	(4.2)	5.0
Income tax expense	(69.7)	$ 37.7	$ 33.9	$ 34.1	26.7	$ 31.8	$ 37.7	$ 36.7	$ 36.0	$ 132.9	$ 125.9
Reconciliation between provision for income taxes and U.S. federal statutory rate applied to income before taxes
Statutory rate (as a percent)									35.00%	35.00%	35.00%
State and local income taxes, net (as a percent)									2.30%	2.40%	2.10%
Reserves for tax exposures (as a percent)									(0.10%)	(0.20%)	0.30%
Change in valuation allowance (as a percent)									(0.60%)	0.60%	0.30%
International operations (as a percent)									(3.10%)	(0.80%)	(1.20%)
Stock-based compensation (as a percent)									(1.60%)	0.00%	0.00%
Impact of law and rate change (as a percent)									(23.20%)	0.00%	0.00%
Other, net (as a percent)									0.30%	0.40%	0.50%
Effective rate (as a percent)									9.00%	37.40%	37.00%
Reversal of tax reserves amount for uncertain tax positions due to statute of limitations expiration									$ 4.1	$ 3.5
Gross deferred tax assets:
Allowances for trade and finance receivables	5.8				9.1				5.8	9.1
Accruals and liabilities	50.5				62.6				50.5	62.6
Employee benefits and compensation	22.7				30.6				22.7	30.6
Net operating loss carryforwards	38.7				25.1				38.7	25.1
Investment basis difference					4.1					4.1
Investment basis difference liability	(2.1)								(2.1)
Other	9.6				11.6				9.6	11.6
Total deferred tax assets	125.2				143.1				125.2	143.1
Deferred tax asset valuation allowance	(28.1)				(26.4)				(28.1)	(26.4)
Total	97.1				116.7				97.1	116.7
Gross deferred tax liabilities:
Property and equipment	(94.3)				(120.0)				(94.3)	(120.0)
Goodwill and intangible assets	(179.6)				(274.6)				(179.6)	(274.6)
Other	(15.9)				(13.8)				(15.9)	(13.8)
Total	(289.8)				(408.4)				(289.8)	(408.4)
Net deferred tax liabilities	(192.7)				(291.7)				(192.7)	(291.7)
Gross tax benefit from state and federal net operating loss carryforwards expire
2018	0.4								0.4
2019	0.3								0.3
2020	0.8								0.8
2021	0.8								0.8
2022	0.1								0.1
2023 to 2037	36.3								36.3
Total	38.7				$ 25.1				38.7	$ 25.1
Undistributed earnings of foreign subsidiaries	$ 282.9								$ 282.9

Income Taxes (Details 2) - USD ($) $ in Millions	12 Months Ended
Income Taxes (Details 2) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax payments
Income tax payments, net of income tax refunds	$ 126.0	$ 121.6	$ 129.9
Federal
Income tax payments
Income tax payments, net of income tax refunds	81.5	79.2	95.2
State and foreign
Income tax payments
Income tax payments, net of income tax refunds	$ 44.5	$ 42.4	$ 34.7

Income Taxes (Details 3) - USD ($) $ in Millions	12 Months Ended
Income Taxes (Details 3) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at beginning of period	$ 14.0	$ 14.9
Increase in prior year tax positions	0.2	1.2
Decrease in prior year tax positions	0.0	0.0
Increase in current year tax positions	1.6	1.4
Settlements	0.0	0.0
Lapse in statute of limitations	(4.1)	(3.5)
Balance at end of period	11.7	14.0
Unrecognized tax benefits that, if recognized, would affect our effective tax rate	7.8	7.8
Reserves, associated with interest and penalties, net of tax	2.4	$ 3.2
Minimum
Significant change in unrecognized tax benefits is reasonably possible
Net decrease in tax impact on the reserve balance	1.0
Maximum
Significant change in unrecognized tax benefits is reasonably possible
Net decrease in tax impact on the reserve balance	$ 2.5

Employee Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
401(k) Plan
Employer matching contribution (as a percent)	100.00%
Maximum percentage of participant's compensation for employer contribution match	4.00%
Participant's vesting percentage in employer contribution	100.00%
Employer's contribution	$ 15.5	$ 13.0	$ 10.8

Commitments and Contingencies (Details) $ in Millions	12 Months Ended
Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2017 USD ($) a item	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Liabilities for environmental matters \| $	$ 0.1	$ 0.1
Regulatory action related to Lower Duwamish Waterway \| IAA
Commitments and Contingencies
Number of years LDW was identified as Superfund site before IAA began leasing Tukwila branch	3 years
Number of entities to whom notice letters have been issued by EPA \| item	116
Minimum number of entities to whom Section 104(e) Requests were sent by EPA \| item	300
Number of PRPs who funded a remedial investigation and feasibility study \| item	4
Cost of environmental cleanup \| $	$ 342.0
Number of acres to be dredged in environmental cleanup \| a	105
Number of acres to be capped in environmental cleanup \| a	24
Number of acres for enhanced natural recovery in environmental cleanup \| a	48
Estimated length of environmental cleanup	17 years
Estimated length of environmental active remediation	7 years
Estimated length of environmental monitored natural recovery	10 years

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation loss	$ (25.3)	$ (49.4)
Unrealized gain on postretirement benefit obligation, net of tax	0.1	0.1
Accumulated other comprehensive loss	$ (25.2)	$ (49.3)

Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
Segment Information (Details) $ in Millions	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment									3
Number of reportable segments \| segment									3
Segment Information
ADESA Auction Services									$ 1,937.5	$ 1,765.3	$ 1,427.8
IAA Salvage Services									1,219.2	1,098.0	994.4
AFC									301.3	286.8	268.4
Operating revenues	$ 890.4	$ 843.0	$ 858.0	$ 866.6	$ 813.7	$ 789.6	$ 788.5	$ 758.3	3,458.0	3,150.1	2,690.6
Operating expenses
Cost of services (exclusive of depreciation and amortization)	525.1	479.2	481.7	501.2	488.3	459.5	447.6	432.0	1,987.2	1,827.4	1,548.5
Selling, general and administrative	172.5	155.7	154.6	157.4	148.8	146.3	146.9	141.1	640.2	583.1	502.0
Depreciation and amortization	69.4	66.2	64.5	64.5	64.7	60.5	59.0	56.4	264.6	240.6	212.8
Total operating expenses	767.0	701.1	700.8	723.1	701.8	666.3	653.5	629.5	2,892.0	2,651.1	2,263.3
Operating profit	123.4	141.9	157.2	143.5	111.9	123.3	135.0	128.8	566.0	499.0	427.3
Interest expense	42.1	41.5	40.1	40.3	38.0	36.3	35.8	28.7	164.0	138.8	91.4
Other (income) expense, net	(0.2)	(0.1)	(1.5)	(0.1)	0.3	0.8	(0.3)	(1.3)	(1.9)	(0.5)	(4.6)
Loss on extinguishment of debt	0.0	0.0	27.5	0.0	1.4	0.0	0.0	4.0	27.5	5.4	0.0
Gain on previously held equity interest value	(21.6)	0.0	0.0	0.0					(21.6)	0.0	0.0
Intercompany expense (income)									0.0	0.0	0.0
Income before income taxes	103.1	100.5	91.1	103.3	72.2	86.2	99.5	97.4	398.0	355.3	340.5
Income taxes	(69.7)	37.7	33.9	34.1	26.7	31.8	37.7	36.7	36.0	132.9	125.9
Net Income	172.8	$ 62.8	$ 57.2	$ 69.2	45.5	$ 54.4	$ 61.8	$ 60.7	362.0	222.4	214.6
Total assets	6,984.3				6,557.6				6,984.3	6,557.6	5,771.5
Capital expenditures									152.2	155.1	134.7
AFC
Segment Information
AFC									301.3	286.8	268.4
Operating Segments \| ADESA Auctions
Segment Information
ADESA Auction Services									1,937.5	1,765.3	1,427.8
Operating expenses
Cost of services (exclusive of depreciation and amortization)									1,123.9	1,036.5	836.9
Selling, general and administrative									360.0	327.0	276.6
Depreciation and amortization									113.1	100.0	86.2
Total operating expenses									1,597.0	1,463.5	1,199.7
Operating profit									340.5	301.8	228.1
Interest expense									1.2	0.1	0.7
Other (income) expense, net									(0.3)	(0.5)	(1.7)
Loss on extinguishment of debt									0.0	0.0
Gain on previously held equity interest value									(21.6)
Intercompany expense (income)									47.4	52.6	57.6
Income before income taxes									313.8	249.6	171.5
Income taxes									52.9	92.7	62.3
Net Income									260.9	156.9	109.2
Total assets	3,132.3				2,898.0				3,132.3	2,898.0	2,390.9
Capital expenditures									66.9	74.8	70.0
Operating Segments \| IAA
Segment Information
IAA Salvage Services									1,219.2	1,098.0	994.4
Operating expenses
Cost of services (exclusive of depreciation and amortization)									778.1	708.0	633.6
Selling, general and administrative									107.1	104.2	98.1
Depreciation and amortization									93.1	87.9	80.8
Total operating expenses									978.3	900.1	812.5
Operating profit									240.9	197.9	181.9
Interest expense									0.0	0.0	0.0
Other (income) expense, net									(0.9)	(0.6)	(1.7)
Loss on extinguishment of debt									0.0	0.0
Gain on previously held equity interest value									0.0
Intercompany expense (income)									37.8	38.1	38.4
Income before income taxes									204.0	160.4	145.2
Income taxes									38.0	59.3	52.4
Net Income									166.0	101.1	92.8
Total assets	1,438.4				1,358.9				1,438.4	1,358.9	1,292.1
Capital expenditures									51.6	41.1	40.4
Operating Segments \| AFC
Segment Information
AFC									301.3	286.8	268.4
Operating expenses
Cost of services (exclusive of depreciation and amortization)									85.2	82.9	78.0
Selling, general and administrative									30.9	28.7	27.8
Depreciation and amortization									31.3	31.1	30.8
Total operating expenses									147.4	142.7	136.6
Operating profit									153.9	144.1	131.8
Interest expense									43.6	34.1	24.1
Other (income) expense, net									0.0	0.0	(1.5)
Loss on extinguishment of debt									0.0	1.4
Gain on previously held equity interest value									0.0
Intercompany expense (income)									(20.2)	(33.8)	(25.3)
Income before income taxes									130.5	142.4	134.5
Income taxes									26.6	54.0	51.3
Net Income									103.9	88.4	83.2
Total assets	2,315.6				2,213.8				2,315.6	2,213.8	2,025.0
Capital expenditures									6.1	7.3	7.0
Holding Company
Segment Information
Operating revenues									0.0	0.0	0.0
Operating expenses
Cost of services (exclusive of depreciation and amortization)									0.0	0.0	0.0
Selling, general and administrative									142.2	123.2	99.5
Depreciation and amortization									27.1	21.6	15.0
Total operating expenses									169.3	144.8	114.5
Operating profit									(169.3)	(144.8)	(114.5)
Interest expense									119.2	104.6	66.6
Other (income) expense, net									(0.7)	0.6	0.3
Loss on extinguishment of debt									27.5	4.0
Gain on previously held equity interest value									0.0
Intercompany expense (income)									(65.0)	(56.9)	(70.7)
Income before income taxes									(250.3)	(197.1)	(110.7)
Income taxes									(81.5)	(73.1)	(40.1)
Net Income									(168.8)	(124.0)	(70.6)
Total assets	$ 98.0				$ 86.9				98.0	86.9	63.5
Capital expenditures									$ 27.6	$ 31.9	$ 17.3

Segment Information (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
Segment Information (Details 2) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Geographic Information
Disclosure of major customers									No single customer accounted for more than ten percent of our total revenues in any fiscal year presented.
Operating revenues	$ 890.4	$ 843.0	$ 858.0	$ 866.6	$ 813.7	$ 789.6	$ 788.5	$ 758.3	$ 3,458.0	$ 3,150.1	$ 2,690.6
Long-lived assets	3,846.9				3,716.4				3,846.9	3,716.4
U.S.
Geographic Information
Operating revenues									3,010.3	2,737.6	2,337.9
Long-lived assets	3,452.4				3,447.5				3,452.4	3,447.5
Foreign
Geographic Information
Operating revenues									447.7	412.5	$ 352.7
Long-lived assets	$ 394.5				$ 268.9				$ 394.5	$ 268.9

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
ADESA Auction Services									$ 1,937.5	$ 1,765.3	$ 1,427.8
Operating revenues	$ 890.4	$ 843.0	$ 858.0	$ 866.6	$ 813.7	$ 789.6	$ 788.5	$ 758.3	3,458.0	3,150.1	2,690.6
Operating expenses
Cost of services (exclusive of depreciation and amortization)	525.1	479.2	481.7	501.2	488.3	459.5	447.6	432.0	1,987.2	1,827.4	1,548.5
Selling, general, and administrative expenses	172.5	155.7	154.6	157.4	148.8	146.3	146.9	141.1	640.2	583.1	502.0
Depreciation and amortization	69.4	66.2	64.5	64.5	64.7	60.5	59.0	56.4	264.6	240.6	212.8
Total operating expenses	767.0	701.1	700.8	723.1	701.8	666.3	653.5	629.5	2,892.0	2,651.1	2,263.3
Operating profit	123.4	141.9	157.2	143.5	111.9	123.3	135.0	128.8	566.0	499.0	427.3
Interest expense	42.1	41.5	40.1	40.3	38.0	36.3	35.8	28.7	164.0	138.8	91.4
Other (income) expense, net	(0.2)	(0.1)	(1.5)	(0.1)	0.3	0.8	(0.3)	(1.3)	(1.9)	(0.5)	(4.6)
Loss on extinguishment of debt	0.0	0.0	27.5	0.0	1.4	0.0	0.0	4.0	27.5	5.4	0.0
Gain on previously held equity interest value	(21.6)	0.0	0.0	0.0					(21.6)	0.0	0.0
Income before income taxes	103.1	100.5	91.1	103.3	72.2	86.2	99.5	97.4	398.0	355.3	340.5
Income taxes	(69.7)	37.7	33.9	34.1	26.7	31.8	37.7	36.7	36.0	132.9	125.9
Net Income	$ 172.8	$ 62.8	$ 57.2	$ 69.2	$ 45.5	$ 54.4	$ 61.8	$ 60.7	$ 362.0	$ 222.4	$ 214.6
Basic net income (loss) per share of common stock (in dollars per share)	$ 1.28	$ 0.46	$ 0.42	$ 0.51	$ 0.33	$ 0.39	$ 0.45	$ 0.44	$ 2.66	$ 1.62	$ 1.53
Diluted net income (loss) per share of common stock (in dollars per share)	$ 1.27	$ 0.46	$ 0.41	$ 0.50	$ 0.33	$ 0.39	$ 0.44	$ 0.44	$ 2.62	$ 1.60	$ 1.51