Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 20, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Entity Registrant Name	Advanced Disposal Services, Inc.
Entity Central Index Key	0001585790
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		88,587,220

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 6.9	$ 6.8
Accounts receivable, net of allowance for doubtful accounts of $4.6 and $5.4, respectively	208.5	199.9
Prepaid expenses and other current assets	40.0	37.9
Total current assets	255.4	244.6
Other assets	30.9	23.0
Property and equipment, net of accumulated depreciation of $1,460.0 and $1,355.5, respectively	1,730.8	1,728.8
Goodwill	1,210.3	1,208.2
Other intangible assets, net of accumulated amortization of $268.3 and $247.6, respectively	271.2	288.7
Total assets	3,498.6	3,493.3
Current liabilities
Accounts payable	125.1	92.3
Accrued expenses	106.5	113.0
Deferred revenue	70.3	69.1
Current maturities of landfill retirement obligations	20.2	20.2
Current maturities of long-term debt	49.2	74.1
Total current liabilities	371.3	368.7
Other long-term liabilities	58.7	61.5
Long-term debt, less current maturities	1,855.6	1,884.2
Accrued landfill retirement obligations, less current maturities	210.8	205.7
Deferred income taxes	93.9	88.6
Total liabilities	2,590.3	2,608.7
Commitments and contingencies
Equity
Common stock: $.01 par value, 1,000,000,000 shares authorized, 88,575,377 and 88,491,194 shares outstanding, respectively	0.9	0.9
Treasury stock at cost, 2,274 and 2,274 shares, respectively	0.0	0.0
Additional paid-in capital	1,493.3	1,487.4
Accumulated deficit	(588.7)	(603.3)
Accumulated other comprehensive income (loss)	2.8	(0.4)
Total stockholders' equity	908.3	884.6
Total liabilities and stockholders’ equity	$ 3,498.6	$ 3,493.3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 4.6	$ 5.4
Accumulated depreciation property and equipment	1,460.0	1,355.5
Accumulated amortization other intangible assets	$ 268.3	$ 247.6
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares outstanding (in shares)	88,575,377	88,491,194
Treasury stock at cost (in shares)	2,274	2,274

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Service revenues	$ 398.1	$ 383.1	$ 762.8	$ 730.5
Operating costs and expenses
Operating	250.7	240.2	486.8	469.1
Selling, general and administrative	44.5	40.6	90.0	85.7
Depreciation and amortization	69.2	67.5	133.9	128.9
Acquisition and development costs	0.1	0.4	0.3	0.8
(Gain) loss on disposal of assets and asset impairments	(1.4)	10.3	(3.3)	10.6
Restructuring charges	0.0	0.0	0.1	0.0
Total operating costs and expenses	363.1	359.0	707.8	695.1
Operating income	35.0	24.1	55.0	35.4
Other (expense) income
Interest expense	(23.6)	(23.1)	(46.6)	(45.6)
Other income (expense), net	2.0	(1.3)	7.9	(1.8)
Total other expense	(21.6)	(24.4)	(38.7)	(47.4)
Income (loss) before income taxes	13.4	(0.3)	16.3	(12.0)
Income tax expense (benefit)	3.7	(0.1)	4.5	(4.8)
Net income (loss)	$ 9.7	$ (0.2)	$ 11.8	$ (7.2)
Net income (loss) attributable to common stockholders per share
Basic income (loss) per share (in dollars per share)	$ 0.11	$ 0.00	$ 0.13	$ (0.08)
Diluted income (loss) per share (in dollars per share)	$ 0.11	$ 0.00	$ 0.13	$ (0.08)
Basic average shares outstanding (in shares)	88,555,647	88,275,698	88,535,860	88,206,590
Diluted average shares outstanding (in shares)	89,272,966	88,275,698	89,147,337	88,206,590

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 9.7	$ (0.2)	$ 11.8	$ (7.2)
Change in fair value of interest rate caps, net of tax of $0.4 and $1.1 for the three and six months ended June 30, 2018, respectively	1.0	0.0	3.2	0.0
Comprehensive income (loss)	$ 10.7	$ (0.2)	$ 15.0	$ (7.2)

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Change in fair value of interest rate caps, tax	$ 0.4	$ 0.0	$ 1.1	$ 0.0

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of implementing new revenue recognition standard, net of tax of $1.1	$ 2.8				$ 2.8
Balance (in shares) at Dec. 31, 2017		88,493,468	2,274
Balance at Dec. 31, 2017	884.6	$ 0.9	$ 0.0	$ 1,487.4	(603.3)	$ (0.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11.8				11.8
Stock-based compensation (in shares)		22,565
Stock-based compensation	4.9			4.9
Stock option exercises (in shares)		61,618
Stock option exercises	1.0			1.0
Unrealized gain resulting from change in fair value of derivative instruments, net of tax of $1.1	3.2					3.2
Balance (in shares) at Jun. 30, 2018		88,577,651	2,274
Balance at Jun. 30, 2018	$ 908.3	$ 0.9	$ 0.0	$ 1,493.3	$ (588.7)	$ 2.8

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (Parenthetical) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Statement of Stockholders' Equity [Abstract]
Unrealized gain resulted from change in fair value of derivative instruments, tax	$ 1.1
Impact of implementing new revenue recognition standard, tax	$ 1.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income (loss)	$ 11.8	$ (7.2)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization	133.9	128.9
Change in fair value of derivative instruments	(5.6)	2.4
Amortization of debt issuance costs and original issue discount	3.3	3.2
Accretion on landfill retirement obligations	7.6	7.4
Other accretion and amortization	2.3	1.9
Provision for doubtful accounts	1.8	2.2
(Gain) loss on disposition of property and equipment	(3.4)	0.9
Impairment of assets	0.0	13.0
Gain on disposition of businesses and assets	0.0	(2.8)
Stock based compensation	4.9	4.7
Deferred tax expense (benefit)	4.8	(6.4)
Earnings in equity investee	(0.9)	(0.6)
Changes in operating assets and liabilities, net of businesses acquired
Increase in accounts receivable	(10.5)	(7.8)
Decrease in prepaid expenses and other current assets	5.5	1.5
Decrease in other assets	0.5	0.1
Increase in accounts payable	26.9	18.3
Decrease in accrued expenses	(6.1)	(9.8)
Increase in deferred revenue	0.5	0.8
(Decrease) increase in other long-term liabilities	(5.8)	0.2
Capping, closure and post-closure obligations	(8.3)	(4.1)
Assumption of long term care and closure reserve	0.0	24.0
Net cash provided by operating activities	163.2	170.8
Cash flows from investing activities
Purchases of property and equipment and landfill construction and development	(86.5)	(79.9)
Proceeds from sale of property and equipment and insurance recoveries	4.2	3.0
Acquisition of businesses, net of cash acquired	(5.9)	(84.3)
Proceeds from sale of businesses	0.0	8.7
Net cash used in investing activities	(88.2)	(152.5)
Cash flows from financing activities
Proceeds from borrowings on debt instruments	53.0	120.0
Repayment on debt instruments, including capital leases	(128.9)	(141.3)
Proceeds from issuance of common stock	1.0	4.7
Net cash used in financing activities	(74.9)	(16.6)
Net increase in cash and cash equivalents	0.1	1.7
Cash and cash equivalents, beginning of period	6.8	1.2
Cash and cash equivalents, end of period	$ 6.9	$ 2.9

Business Operations	6 Months Ended
Business Operations	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Operations	Business Operations Advanced Disposal Services, Inc. together with its consolidated subsidiaries (the "Company"), as a consolidated entity, is a non-hazardous solid waste services company providing collection, transfer, recycling and disposal services to customers in the South, Eastern and Midwest regions of the United States. The Company manages and evaluates its principal operations through three reportable operating segments on a regional basis. Those operating segments are the South, East and Midwest regions which provide collection, transfer, recycling and disposal services. Additional information related to segments can be found in Note 10. Six acquisitions were completed during the six months ended June 30, 2018 for aggregate consideration consisting of a cash purchase price of $5.9 and notes payable of $0.7 subject to net working capital adjustments and other commitments, which are expected to be completed within approximately one year. Eight acquisitions were completed during the six months ended June 30, 2017 for a cash purchase price, net of cash acquired, of $84.3 and notes payable of $1.6. The results of operations of each acquisition are included in the Company's unaudited condensed consolidated statements of operations subsequent to the closing date of each acquisition. Our acquisition accounting and valuation processes with respect to property and equipment, intangible assets, current liabilities and long-term liabilities related to acquisitions completed subsequent to January 1, 2018 are preliminary and subject to adjustments. During the three and six months ended June 30, 2018, the Company recorded a charge in operating expenses of $5.4 related to engineered enhancement of leachate and gas infrastructure and reconstruction of specific storm and surface water control systems at one of its landfills. As a result, the location redirected waste to 3rd party sites to allow for construction activities in a limited delineated area of the site. This charge was recorded based on costs incurred to redirect waste for an interim period to complete construction activities and allow for the Company to be considered for an expansion permit. The Company has incurred expenditures of $3.4 as of June 30, 2018 related to this matter. During the six months ended June 30, 2017, the Company entered into an Asset Transfer and Liability Assumption Agreement with BFI Waste Systems of North America, LLC. The Company received a cash payment of $24.0 which was recorded as an operating cash flow. In exchange for this payment, the Company assumed certain post-closure liabilities of a closed portion of a landfill and became responsible for expenditures related to a gas infrastructure system. The present value of the assumed post-closure liabilities and expenditures related to the gas infrastructure system over the life of the landfill approximate the amount of the cash received. During the three and six months ended June 30, 2017, the Company divested of its collection operation in Charlotte, North Carolina for consideration received of $8.7. A $1.4 gain on the sale of that business is included in the Company's unaudited condensed consolidated statements of operations for the three and six months ended June 30, 2017.

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Company’s condensed consolidated financial statements include its wholly-owned subsidiaries and their respective subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements as of June 30, 2018 and for the three and six months ended June 30, 2018 and 2017 are unaudited. In the opinion of management, these condensed consolidated financial statements include all adjustments, which, unless otherwise disclosed, are of a normal recurring nature, necessary for a fair statement of the balance sheet, results of operations, comprehensive income (loss), cash flows, and changes in equity for the periods presented. The results for interim periods are not necessarily indicative of results for the entire year. The financial statements presented herein should be read in conjunction with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. In conformity with accounting principles generally accepted in the United States of America, the Company uses estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. The Company must make these estimates and assumptions because certain information that it uses is dependent on future events, cannot be calculated with a high degree of precision from data available or simply cannot be readily calculated based on generally accepted methodologies. In preparing the Company's financial statements, the more subjective areas that deal with the greatest amount of uncertainty relate to: accounting for long-lived assets, including recoverability; landfill development costs, final capping, closure and post-closure costs; valuation allowances for accounts receivable and deferred tax assets; liabilities for potential litigation, claims and assessments; liabilities for environmental remediation; stock compensation; accounting for goodwill and intangible asset impairments; deferred taxes; uncertain tax positions; self-insurance reserves; and estimates of the fair value of assets acquired and liabilities assumed in any acquisition. Actual results could differ materially from the estimates and assumptions that the Company uses in preparation of its financial statements. Intangible Asset Impairment The Company has collection operations in South Carolina which operate in a competitor-owned disposal market that does not align with the Company's long-term market strategy of vertically integrated operations with Company-owned disposal sites or marketplace neutral disposal sites. During April of 2017, changes in facts and circumstances led the Company to evaluate the long-term market for South Carolina collection operations and re-evaluate the expected cash flows provided by this market. The Company determined it appropriate to impair certain intangible assets that were recorded as part of the purchase accounting when these entities were acquired. Based on the Company's evaluation, the Company recorded an intangible asset impairment of $13.0 during the second quarter of 2017. Recently Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09 (Topic 606) "Revenue from Contracts with Customers." Topic 606 supersedes the revenue recognition requirements in Topic 605 "Revenue Recognition" (Topic 605), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 and applicable technical updates as of January 1, 2018 using the modified retrospective transition method. See Note 3 for further details. In August 2016, the FASB issued ASU 2016‑15 associated with the classification of certain cash receipts and cash payments in the statement of cash flows. In November 2016, the FASB issued ASU 2016‑18 associated with the presentation of restricted cash and cash equivalents in the statement of cash flows. The objective of both amendments was to reduce existing diversity in practice. The Company's adoption of these ASUs in fiscal 2018 did not have a material impact on the Company's Statement of Cash Flows. Recently Issued Accounting Standards In February 2016, the FASB issued ASU 2016-02, Leases, and in July 2018 the FASB issued ASU 2018-11, Leases: Targeted Improvements. Lessees will be required to recognize most leases on their balance sheets as a right-of-use asset with a corresponding lease liability, and lessors will be required to recognize a net lease investment. Additional qualitative and quantitative disclosures will also be required to increase transparency and comparability among organizations. This standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption of the standard is permitted; however, the Company does not expect to early adopt the standard. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented or as of the adoption date with a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to adopt the standard by recognizing and measuring leases as of the adoption date with a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The Company is assessing the provisions of this amended guidance and has (i) formed an implementation team (ii) acquired a software solution to manage and account for leases under the new standard (iii) solicited feedback on the population of leases from business unit personnel and (iv) analyzed payment activity and general ledger accounts to further identify leases under the new standard. The Company is currently evaluating the impact of this amended guidance on its consolidated financial statements but does not anticipate any material changes to operating results or liquidity.

Revenue Recognition

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Adoption of ASC Topic 606, "Revenue from Contracts with Customers"

On January 1, 2018, the Company adopted Topic 606 using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company's historic accounting under Topic 605.

The Company recorded a net reduction to opening accumulated deficit of $2.8 as of January 1, 2018 due to the cumulative impact of adopting Topic 606, with the impact primarily related to capitalization of sales commissions. The impact to service revenues for the three and six months ended June 30, 2018 was a decrease of $8.8 and $16.8, respectively, as a result of applying Topic 606 and an associated policy election to treat applicable state landfill tax payments as a reduction of revenue (historically recorded as an operating expense). Recycling rebates paid to customers, franchise fees paid to customers and state landfill tax payments are now recognized as a reduction of revenue.

Revenue Recognition

Revenues are recognized when control of the promised goods or services is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Further discussion of revenue for each major lines of business is provided below.

Residential Collection Revenue

The Company's residential collection operations consist of curbside collection of residential refuse from small carts or containers into collection vehicles for transport to a disposal/recycling site. These services are typically performed either under long-term contracts with local government entities or on a subscription basis, whereby individual households contract directly with the Company for collection services. The Company's residential collection service fees are typically quoted in its contracts on a weekly or monthly basis and revenue is recognized as the services are provided each month. The Company's residential contracts generally allow for annual rate increases and the number of households serviced under the Company's municipal contracts change throughout the contract period. For these reasons, revenue associated with the Company's residential collection service contracts is accounted for as variable consideration and the amounts recorded represent the value of the performance obligations completed.

Commercial Collection Revenue

The Company's commercial collection operations consist of collection of commercial refuse from Company supplied waste containers for transport to a disposal/recycling site. Standard service agreements with commercial customers are typically three to five years in length with pricing based on estimated disposal weight and time required to service the account. The Company's commercial collection service fees are typically quoted in its service agreements on a weekly or monthly basis and revenue is recognized as the services are provided each month. The Company's commercial service agreements generally allow for rate increases and it is not uncommon for the collection needs of the customer to change throughout the contract period. For these reasons, revenue associated with the Company's commercial collection service agreements is accounted for as variable consideration and the amounts recorded represent the value of the performance obligations completed.

Rolloff Collection Revenue

The Company's rolloff collection operations consist of providing construction and demolition sites with rolloff containers and collecting, transporting and disposing of the customers' waste at a disposal site. Rolloff services are typically provided pursuant to arrangements in which the customer provides 24-hour advance notice of its disposal needs and is billed on a "per pull" plus disposal basis. The Company typically has written service agreements with permanent rolloff customers but does not enter into written service agreements with customers that utilize temporary rolloff containers due to the relatively short-term nature of their needs. The Company's permanent rolloff service agreements generally allow for rate increases and number of pulls plus disposal weight vary throughout the contract period. For these reasons, revenue associated with the Company's rolloff collection service agreements is accounted for as variable consideration and the amounts recorded represent the value of the performance obligations completed.

Disposal Revenue

Transfer stations provide collection operations with a cost-effective means to consolidate waste and reduce transportation costs while providing the Company's landfill sites with an additional “gate” to extend the geographic reach of its landfills. Disposal revenue at transfer stations is primarily generated by charging tipping or disposal fees to third party customers.

Landfill disposal services represent the final stage in the Company's vertically integrated waste collection and disposal services solution. The Company generates disposal revenue at its landfills by charging tipping or disposal fees to third party customers.

The Company's landfill and transfer station tipping fees are quoted to customers on a per ton basis and disposal weight varies each time the customer disposes of waste at a Company facility. For these reasons, revenue associated with the Company's disposal services is accounted for as variable consideration and the amounts recorded represent the value of the performance obligations completed.

Sale of Recyclables

The Company has a network of 22 recycling facilities that it manages or operates. These facilities generate revenue through the collection, processing and sale of old corrugated cardboard, old newspaper, mixed paper, aluminum, glass and other materials. These recyclable materials are internally collected by the Company's residential, commercial and industrial collection operations as well as third-party haulers. The Company's sale of recyclables are quoted to customers on a per ton basis and recyclable weight varies each time the Company sells recyclables to its customers. For these reasons, revenue associated with the Company's sale of recyclables is accounted for as variable consideration and the amounts recorded represent the value of the performance obligations completed.

Fuel and Environmental Charges

The amounts charged for collection, disposal and recycling services may include fuel and environmental charges. These charges are not designed to be specific to the direct costs to service an individual customer’s account, but rather are designed to help recover changes in the Company's overall cost structure and to achieve an acceptable operating margin. Fuel and environmental charges vary each month in relation to the variable consideration of collection, disposal and recycling services. For this reason, fuel and environmental charges are accounted for as variable consideration.

Other Revenue

Other revenue is comprised of the following:


•	Trucking revenue;


•	Landfill management fee revenue;


•	Sale of landfill gas revenue;


•	Brokerage revenue; and


•	Service charges, administrative charges and other charges.

Other revenue typically varies based on volume of the related service therefore the Company accounts for this revenue as variable consideration.

Revenue by Segment

See Note 10 for additional information related to revenue by reportable segment and major line of business.

Variable Consideration

As described above, the Company accounts for revenue for each line of business as variable consideration. The Company believes that there will not be significant changes to its estimates of variable consideration as revenue recognized is recorded in accordance with the terms of the related contracts or verbal agreements.

Capitalized Sales Commissions

Under Topic 606, the Company capitalizes sales commissions as contract assets related to commercial and permanent rolloff collection customers and amortizes those sales commissions over the estimated customer life. The balance of capitalized sales commissions as of June 30, 2018 and January 1, 2018 were $4.0 and $3.8, respectively. The Company recorded amortization expense of $0.4 and $0.7 related to capitalized sales commissions for the three and six months ended June 30, 2018, respectively.

Deferred Revenues

The Company records deferred revenue when cash payments are received in advance of the Company's performance. The increase in the deferred revenue balance from December 31, 2017 to June 30, 2018 is primarily driven by cash payments received in advance of the Company satisfying its performance obligations, offset by $67.9 of revenues recognized that were included in the deferred revenue balance at December 31, 2017.

Topic 606 Practical Expedients

As allowed by Topic 606, the Company does not disclose the value of unsatisfied performance obligations related to its contracts and service agreements as the Company accounts for its revenue as variable consideration and has the right to invoice for services performed each period.

Landfill Liabilities

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Landfill Liabilities

Liabilities for final closure and post-closure costs for the year ended December 31, 2017 and for the six months ended June 30, 2018 are shown in the table below:



Balance at December 31, 2016	$	191.1
Increase in retirement obligation	9.7
Accretion of closure and post-closure costs	15.4
Acquisition	28.3
Change in estimate	2.1
Costs incurred	(20.7		)
Balance at December 31, 2017	225.9
Increase in retirement obligation	4.7
Accretion of closure and post-closure costs	7.6
Costs incurred	(7.2		)
Balance at June 30, 2018	231.0
Less: Current portion	(20.2		)
	$	210.8

Earnings (Loss) Per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

The following table sets forth the computation of basic earnings (loss) per share and earnings (loss) per share, assuming dilution:



		Three Months Ended June 30,					Six Months Ended June 30,
		2018		2017			2018		2017
Numerator:
	Net income (loss)	$	9.7	$	(0.2	)	$	11.8	$	(7.2	)
Denominator:
	Average common shares outstanding	88,555,647		88,275,698			88,535,860		88,206,590
	Other potentially dilutive common shares	717,319		—			611,477		—
	Average common shares outstanding, assuming dilution	89,272,966		88,275,698			89,147,337		88,206,590

	Basic net income (loss) per share	$	0.11	$	—		$	0.13	$	(0.08	)
	Diluted net income (loss) per share	$	0.11	$	—		$	0.13	$	(0.08	)

Basic net income (loss) per share is based on the weighted-average number of shares of common stock outstanding for each of the periods presented. Diluted net income (loss) per share is based on the weighted-average number of shares of common stock equivalents outstanding adjusted for the effects of common stock that may be issued as a result of potentially dilutive instruments. The Company's potentially dilutive instruments are made up of equity awards, which include stock options, restricted stock units and performance stock units.

Pursuant to the FASB’s Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share, the Company includes additional shares in the computation of diluted net income per share. The additional shares included in diluted net income per share represent the number of shares that would be issued if all of the above potentially dilutive instruments were converted into common stock. When calculating diluted net income per share, the ASC requires the Company to include the potential shares that would be outstanding if dilutive outstanding stock options were exercised. This number is different from outstanding stock options because it is offset by shares the Company could repurchase using the proceeds from these hypothetical exercises to obtain the common stock equivalent.

Approximately 2.3 million and 4.6 million of outstanding stock awards were excluded from the diluted net income (loss) per share calculation for the three months ended June 30, 2018 and June 30, 2017, respectively, because their effect was antidilutive. Approximately 2.3 million and 4.2 million of outstanding stock awards were excluded from the diluted income (loss) per share calculation for the six months ended June 30, 2018 and June 30, 2017, respectively, because their effect was antidilutive.

Debt

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Debt

The following table summarizes the major components of debt at each balance sheet date and provides the maturities and interest rate ranges of each major category of debt:



	June 30, 2018			December 31, 2017
Revolving line of credit with lenders (Revolver), interest at applicable rate plus margin, as defined (6.75% and 6.25% at June 30, 2018 and December 31, 2017, respectively) due quarterly; balance due at maturity in November 2021	$	3.0		$	29.0
Term loans (Term Loan B); quarterly payments of $3.75 commencing March 31, 2017 through September 30, 2023 with final payment due November 10, 2023; interest at an alternate base rate or adjusted LIBOR rate with a 0.75% floor plus an applicable margin	1,430.0			1,460.0
Senior notes (Senior Notes) payable; interest at 5.625% payable in arrears semi-annually commencing May 15, 2017; maturing on November 15, 2024	425.0			425.0
Capital lease obligations, maturing through 2024	65.5			63.9
Other debt	9.6			11.8
	1,933.1			1,989.7
Less: Original issue discount and debt issuance costs classified as a reduction to long-term debt	(28.3		)	(31.4		)
Less: Current portion	(49.2		)	(74.1		)
	$	1,855.6		$	1,884.2

All borrowings under the Term Loan B, Revolver and Senior Notes are guaranteed by each of the Company's current and future domestic subsidiaries, subject to certain agreed-upon exemptions. All guarantors are jointly and severally and fully and unconditionally liable. There are no significant restrictions on the Company or any guarantor to obtain funds from its subsidiaries by dividend or loan.

Revolver and Letter of Credit Facilities

As of June 30, 2018, the Company had an aggregate committed capacity of $300.0, of which $100.0 was available for letters of credit under its credit facilities. The Company’s Revolver is its primary source of letter of credit capacity and expires in 2021. As of June 30, 2018 and December 31, 2017, the Company had $3.0 and $29.0 of borrowings outstanding on the Revolver, respectively. As of June 30, 2018 and December 31, 2017, the Company had an aggregate of $32.3 and $39.3, respectively, of letters of credit outstanding under its credit facilities.

Derivative Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

The following table summarizes the fair values of derivative instruments recorded in the Company’s condensed consolidated balance sheets:



	Balance Sheet Location	June 30, 2018		December 31, 2017
Derivatives Designated as Hedging Instruments
2017 Interest rate caps	Other assets	$	4.5	$	—
2017 Interest rate caps	Other long-term liabilities	—		(0.4		)
Derivatives Not Designated as Hedging Instruments
2016 Interest rate caps	Prepaid expenses and other current assets	6.5		0.9
2016 Interest rate caps	Other assets	2.2		2.8
Total derivatives		$	13.2	$	3.3

The Company has not offset fair value of assets and liabilities recognized for its derivative instruments.

Interest Rate Caps

In November 2017, the Company entered into two interest rate cap agreements as cash flow hedges (the "2017 interest rate caps") to hedge the risk of a rise in interest rates and associated cash flows on its variable rate debt. The Company has applied hedge accounting to the 2017 interest rate caps; therefore, changes in the fair value of the 2017 interest rate caps, to the extent they are effective, are recorded in other comprehensive income, net of tax in the condensed consolidated statements of comprehensive income (loss). The 2017 interest rate caps commence in 2019 and expire in 2021. The Company will pay the $4.9 premium on the 2017 interest rate caps in monthly installments beginning in October 2019. The Company recorded a gain related to the 2017 interest rate caps of $1.0 for the three months ended June 30, 2018 which was recorded in other comprehensive income in the condensed consolidated statements of comprehensive income (loss). The Company recorded a gain related to the 2017 interest rate caps of $3.8 for the six months ended June 30, 2018 of which the effective portion of $3.2 was recorded in other comprehensive income in the condensed consolidated statements of comprehensive income (loss) and the ineffective portion of $0.6 was recorded in other income (expense), net in the condensed consolidated statement of operations. The notional value of the 2017 interest rate cap contracts aggregated were $600.0 as of June 30, 2018 and will remain constant through maturity in 2021.

In May 2016, the Company entered into three interest rate cap agreements (the "2016 interest rate caps") as economic hedges against the risk of a rise in interest rates and the associated cash flows on its variable rate debt. The Company is paying the $5.5 premium of the 2016 interest rate caps equally over eleven quarters beginning on March 31, 2017. The Company elected not to apply hedge accounting to the 2016 interest rate caps, therefore, changes in the fair value of the 2016 interest rate caps are recorded in other income (expense), net in the condensed consolidated statements of operations. The Company recorded a gain related to the 2016 interest rate caps of $1.4 and a loss of $2.0 for the three months ended June 30, 2018 and 2017, respectively. The Company recorded a gain related to the 2016 interest rate caps of $6.0 and a loss of $3.3 for the six months ended June 30, 2018 and 2017, respectively. The notional value of the 2016 interest rate cap contracts aggregated were $800.0 as of June 30, 2018 and will remain constant through maturity in September 2019.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective income tax rate for the three months ended June 30, 2018 and 2017 was 27.6% and 33.3%, respectively. The Company evaluates its effective income tax rate at each interim period and adjusts it accordingly as facts and circumstances warrant. The difference between income taxes computed at the federal statutory rate of 21% and reported income taxes for the three months ended June 30, 2018 was primarily due to the unfavorable impact of state and local taxes and the unfavorable change in recorded valuation allowance. The effective tax rate for the three months ended June 30, 2017 is materially consistent with the federal statutory rate of 35%. The Company’s effective income tax rate for the six months ended June 30, 2018 and 2017 was 27.6% and 40.0%, respectively. The difference between income taxes computed at the federal statutory rate of 21% and reported income tax expense for the six months ended June 30, 2018 was primarily due to the unfavorable impact of state and local taxes and the unfavorable change in recorded valuation allowance. The difference between income taxes computed at the federal statutory rate of 35% and reported income taxes for the six months ended June 30, 2017 was primarily due to the favorable impact of recorded valuation allowance and the favorable impact of state and local taxes. As of June 30, 2018, the Company had $31.0 of liabilities associated with unrecognized tax benefits and related interest. These liabilities are included as components of other liabilities and deferred income taxes in the Company’s consolidated balance sheet. The Company does not anticipate that settlement of the liabilities will require payment of cash within the next twelve months. The Company is not able to reasonably estimate when it would make any cash payments required to settle these liabilities, but does not believe that the ultimate settlement of its obligations will materially affect its liquidity. On December 22, 2017, the Tax Cut and Jobs Act (the “Act”) was signed into law. In accordance with Staff Accounting Bulletin (“SAB”) 118, the Company recognized the estimated impact of this legislation as a component of the benefit for income taxes in its audited financial statements for the year ended December 31, 2017. SAB 118 allows for a measurement period, not to extend beyond one year from the enactment date, for companies to complete their accounting for the provisions of the Act under ASC 740. As of June 30, 2018, no subsequent adjustments have been made to the provisional amounts recorded with the financial statements for the year ended December 31, 2017. The Company is still analyzing certain aspects of the Act and is refining its calculations, which could potentially affect the provisional measurement of these balances. The Company's estimate of the impacts of the Act may change due to future guidance issued by the U.S. Treasury Department, Internal Revenue Services, Financial Standards Accounting Board and other standard setting bodies. The Company continues to analyze its estimate of a $0.1 tax related to the Act’s taxation of deemed repatriation on foreign earnings related to the Company’s Bahamas operations. The completion of the Company's 2017 income tax returns by the fourth quarter 2018 may also impact the provisional amounts that have been recorded.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Financial Instruments The Company has obtained letters of credit, performance bonds and insurance policies for the performance of the following: landfill final capping, closure and post-closure requirements; certain collection, landfill and transfer station contracts; environmental remediation; and other obligations. Letters of credit are supported by the Company’s Revolver (Note 6). The Company does not expect that any claims against or draws on these instruments would have a material adverse effect on the Company’s condensed consolidated financial statements. The Company has not experienced any unmanageable difficulty in obtaining the required financial assurance instruments for its current operations. In an ongoing effort to mitigate risks of future cost increases and reductions in available capacity, the Company continues to evaluate various options to access cost-effective sources of financial assurance. Insurance The Company carries insurance coverage for protection of its assets and operations from certain risks including automobile liability, general liability, real and personal property, workers' compensation, directors' and officers' liability, pollution, legal liability and other coverages the Company believes are customary to the industry. The Company's exposure to loss for insurance claims is generally limited to the per incident deductible, or self-insured retention, under the related insurance policy. Its exposure, however, could increase if its insurers are unable to meet their commitments on a timely basis. The Company has retained a significant portion of the risks related to its automobile, general liability, workers' compensation and health claims programs. For its self-insured retentions, the exposure for unpaid claims and associated expenses, including incurred but not reported losses, is based on an actuarial valuation and internal estimates. The accruals for these liabilities could be revised if future occurrences or loss development significantly differ from the Company's assumptions used. The Company does not expect the impact of any known casualty, property, environmental or other contingency to have a material impact on its financial condition, results of operations or cash flows. Litigation and Other Matters In February 2009, the Company and certain of its subsidiaries were named as defendants in a purported class action suit in the Circuit Court of Macon County, Alabama. Similar class action complaints were brought against the Company and certain of its subsidiaries in 2011 in Duval County, Florida and in 2013 in Quitman County, Georgia and Barbour County, Alabama, and in 2014 in Chester County, Pennsylvania. The 2013 Georgia complaint was dismissed in March 2014. In late 2015 in Gwinnett County, Georgia, another purported class action suit was filed. The plaintiffs in those cases primarily allege that the defendants charged improper charges (fuel, administrative and environmental charges) that were in breach of the plaintiffs' service agreements with the Company and seek damages in an unspecified amount. The Company believes that it has meritorious defenses against these purported class actions, which it will vigorously pursue. Given the inherent uncertainties of litigation, including the early stage of these cases, the unknown size of any potential class, and legal and factual issues in dispute, the outcome of these cases cannot be predicted and a range of loss, if any, cannot currently be estimated. In February 2017, a waste slide occurred in one cell at the Company’s Greentree Landfill in Kersey, Pennsylvania. During the three months ended June 30, 2018, the Company recorded a benefit in operating expenses of $3.7 as a result of higher insurance recoveries than previously estimated. No benefit or charge was recorded in operating expenses during three months ended June 30, 2017 related to this matter. During the six months ended June 30, 2018 and 2017, the Company recorded a charge in operating expenses of $0.1 and $5.4, respectively. These charges were recorded to adjust the reserve related to this matter to the remaining probable costs to relocate displaced material and restore infrastructure, net of insurance recoveries; this amount could increase or decrease as a result of actual costs incurred to completion. The Company has incurred expenditures of $6.4, net of insurance recoveries, as of June 30, 2018 related to this matter. The Company is subject to various other proceedings, lawsuits, disputes and claims and regulatory investigations arising in the ordinary course of its business. Many of these actions raise complex factual and legal issues and are subject to uncertainties. Actions filed against the Company include commercial, customer, and employment-related claims. The plaintiffs in some actions seek unspecified damages or injunctive relief, or both. These actions are in various procedural stages, and some are covered in part by insurance. Although the Company cannot predict the ultimate outcome and the range of loss cannot be currently estimated, the Company does not believe that the eventual outcome of any such action could have a material adverse effect on its business, financial condition, results of operations, or cash flows. Multiemployer Defined Benefit Pension Plans Approximately 14.3% of the Company’s workforce is covered by collective bargaining agreements with various local unions across its operating regions. As a result of some of these agreements, certain of the Company’s subsidiaries are participating employers in a number of trustee-managed multiemployer, defined benefit pension plans for the affected employees. In connection with its ongoing renegotiation of various collective bargaining agreements, the Company may discuss and negotiate for the complete or partial withdrawal from one or more of these pension plans. A complete or partial withdrawal from a multiemployer pension plan may also occur if employees covered by a collective bargaining agreement vote to decertify a union from continuing to represent them. The Company is not aware of any such actions in connection with continuing operations. As a result of certain discontinued operations, the Company is potentially exposed to certain withdrawal liabilities. The Company does not believe that any future withdrawals, individually or in the aggregate, from the multiemployer plans to which it contributes could have a material adverse effect on the Company's business, financial condition or liquidity. However, such withdrawals could have a material adverse effect on the Company's results of operations for a particular reporting period, depending on the number of employees withdrawn in any future period and the financial condition of the multiemployer plan(s) at the time of such withdrawal(s). Tax Matters The Company has open tax years dating back to 2003. Prior to the acquisition in fiscal 2012, Veolia ES Solid Waste division was part of a consolidated group and is still subject to IRS and state examinations dating back to 2004. Pursuant to the terms of the acquisition of Veolia ES Solid Waste, Inc., the Company is entitled to certain indemnifications for Veolia ES Solid Waste Division's pre-acquisition tax liabilities. The Company maintains a liability for uncertain tax positions, the balance of which management believes is adequate. Results of audit assessments by taxing authorities are not currently expected to have a material adverse impact on the Company's results of operations or cash flows.

Segment and Related Information

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment and Related Information

The Company manages and evaluates its operations primarily through its South, East and Midwest regional segments. These three groups are presented below as the Company’s reportable segments. The Company’s three geographic operating segments provide collection, transfer, disposal and recycling services. The Company serves residential, commercial and industrial, and municipal customers throughout its operating segments.

Service revenues, operating income/(loss) and depreciation and amortization for the Company's reportable segments for the periods indicated are shown in the following tables:



	Service Revenues		Operating Income (Loss)			Depreciation and Amortization

Three Months Ended June 30, 2018
South	$	152.7	$	21.3		$	21.5
East	104.3		12.7			20.5
Midwest	141.1		18.6			26.1
Corporate	—		(17.6		)	1.1
	$	398.1	$	35.0		$	69.2

Three Months Ended June 30, 2017
South	$	139.6	$	24.0		$	19.7
East	100.2		(5.3		)	20.1
Midwest	143.3		20.6			25.2
Corporate	—		(15.2		)	2.5
	$	383.1	$	24.1		$	67.5


Six Months Ended June 30, 2018
South	301.6		47.3			43.2
East	193.6		10.9			38.4
Midwest	267.6		32.5			50.0
Corporate	—		(35.7		)	2.3
	$	762.8	$	55.0		$	133.9

Six Months Ended June 30, 2017
South	$	275.1	$	46.2		$	38.8
East	186.2		(7.9		)	37.7
Midwest	269.2		31.9			47.8
Corporate	—		(34.8		)	4.6
	$	730.5	$	35.4		$	128.9

The following table presents the Company's revenues disaggregated by major line of business. Recycling rebates paid to customers, franchise fees paid to customers and state landfill taxes are excluded from revenues.



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017 (1)		2018		2017 (1)
Residential Collection Revenue	$	101.7	$	97.5	$	201.1	$	191.0
Commercial Collection Revenue	93.9		92.0		186.0		182.6
Rolloff Collection Revenue	65.4		63.2		126.0		120.2
Disposal Revenue	73.4		73.5		130.5		128.8
Fuel and Environmental Charges	29.2		23.9		56.0		46.9
Sale of Recyclables	4.1		8.7		9.4		16.4
Other Revenue	30.4		24.3		53.8		44.6
	$	398.1	$	383.1	$	762.8	$	730.5

(1) Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company's historic accounting under Topic 605.

Fluctuations in the Company's operating results may be caused by many factors, including period-to-period changes in the relative contribution of revenue by each line of business and operating segment and by general economic conditions. In addition, its revenues and income from operations typically reflect seasonal patterns. The Company expects its operating results to vary seasonally, with revenues typically lowest in the first quarter, higher in the second and third quarters and lower in the fourth quarter than in the second and third quarters. This seasonality reflects the lower volume of solid waste generated during the late fall, winter and early spring in the East and Midwest segments because of decreased construction and demolition activities during winter months in these regions of the United States. In addition, some of the Company's operating costs may be higher in the winter months. Adverse winter weather conditions slow waste collection activities, resulting in higher labor and operational costs. Greater precipitation in the winter increases the weight of collected municipal solid waste, resulting in higher disposal costs, which are calculated on a per ton basis.

Additionally, certain destructive weather conditions that tend to occur during the second half of the year, such as hurricanes that most often impact the South region, can increase the Company’s revenues in the areas affected. While weather-related and other occurrences can boost revenues through additional work, the earnings generated can be moderated as a result of significant start-up costs and other factors, resulting in earnings at comparatively lower margins. These destructive weather conditions can result in higher fuel costs, higher labor costs, reduced municipal contract productivity and higher disposal costs in disposal neutral markets. Certain weather conditions, including severe winter storms, may result in the temporary suspension of the Company’s operations, which can significantly affect the operating results of the affected regions.

Fair Value Measurements

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Assets and Liabilities Accounted for at Fair Value

In measuring fair values of assets and liabilities, the Company uses valuation techniques that maximize the use of observable inputs (Level 1) and minimize the use of unobservable inputs (Level 3). The Company does not have any assets or liabilities measured using unobservable Level 3 inputs. The Company also uses market data or assumptions that it believes market participants would use in pricing an asset or liability, including assumptions about risk when appropriate. The carrying value for certain of the Company's financial instruments approximate fair value because of their short-term nature. The Company’s assets and liabilities that are measured at fair value on a recurring basis include the following:



				Fair Value Measurement at June 30, 2018 Reporting Date Using
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Carrying Value

Recurring fair value measurements
Cash and cash equivalents	$	6.9		$	6.9	$	—		$	6.9
Interest rate caps - asset position	13.2			—		13.2			13.2
Total recurring fair value measurements	$	20.1		$	6.9	$	13.2		$	20.1

				Fair Value Measurement at December 31, 2017 Reporting Date Using
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Carrying Value

Recurring fair value measurements
Cash and cash equivalents	$	6.8		$	6.8	$	—		$	6.8
Interest rate caps - asset position	3.7			—		3.7			3.7
Interest rate caps - liability position	(0.4		)	$	—	(0.4		)	(0.4		)
Total recurring fair value measurements	$	10.1		$	6.8	$	3.3		$	10.1

The fair value of the interest rate caps are determined using standard option valuation models with assumptions about interest rates based on those observed in underlying markets (Level 2 in fair value hierarchy).

Fair Value of Debt

The fair value of the Company’s debt (Level 2) is estimated using indirectly observable market inputs, except for the Revolver for which cost approximates fair value due to the short-term nature of the interest rate. Although the Company has determined the estimated fair value amounts using quoted market prices, considerable judgment is required in interpreting the information and in developing the estimated fair values. Therefore, these estimates are not necessarily indicative of the amounts that the Company, or holders of the instruments, could realize in a current market exchange. The fair value estimates are based on information available as of June 30, 2018 and December 31, 2017, respectively.

The estimated fair value of the Company’s debt is as follows:



	June 30, 2018		December 31, 2017
Revolver	$	3.0	$	29.0
Senior Notes	422.9		435.1
Term Loan B	1,430.0		1,467.3
	$	1,855.9	$	1,931.4

The carrying value of the Company’s debt at June 30, 2018 and December 31, 2017 was $1,858.0 and $1,914.0, respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	The Company’s condensed consolidated financial statements include its wholly-owned subsidiaries and their respective subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates and Assumptions	In conformity with accounting principles generally accepted in the United States of America, the Company uses estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. The Company must make these estimates and assumptions because certain information that it uses is dependent on future events, cannot be calculated with a high degree of precision from data available or simply cannot be readily calculated based on generally accepted methodologies. In preparing the Company's financial statements, the more subjective areas that deal with the greatest amount of uncertainty relate to: accounting for long-lived assets, including recoverability; landfill development costs, final capping, closure and post-closure costs; valuation allowances for accounts receivable and deferred tax assets; liabilities for potential litigation, claims and assessments; liabilities for environmental remediation; stock compensation; accounting for goodwill and intangible asset impairments; deferred taxes; uncertain tax positions; self-insurance reserves; and estimates of the fair value of assets acquired and liabilities assumed in any acquisition. Actual results could differ materially from the estimates and assumptions that the Company uses in preparation of its financial statements.
Recently Adopted and Issued Accounting Standards	Recently Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09 (Topic 606) "Revenue from Contracts with Customers." Topic 606 supersedes the revenue recognition requirements in Topic 605 "Revenue Recognition" (Topic 605), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 and applicable technical updates as of January 1, 2018 using the modified retrospective transition method. See Note 3 for further details. In August 2016, the FASB issued ASU 2016‑15 associated with the classification of certain cash receipts and cash payments in the statement of cash flows. In November 2016, the FASB issued ASU 2016‑18 associated with the presentation of restricted cash and cash equivalents in the statement of cash flows. The objective of both amendments was to reduce existing diversity in practice. The Company's adoption of these ASUs in fiscal 2018 did not have a material impact on the Company's Statement of Cash Flows. Recently Issued Accounting Standards In February 2016, the FASB issued ASU 2016-02, Leases, and in July 2018 the FASB issued ASU 2018-11, Leases: Targeted Improvements. Lessees will be required to recognize most leases on their balance sheets as a right-of-use asset with a corresponding lease liability, and lessors will be required to recognize a net lease investment. Additional qualitative and quantitative disclosures will also be required to increase transparency and comparability among organizations. This standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption of the standard is permitted; however, the Company does not expect to early adopt the standard. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented or as of the adoption date with a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to adopt the standard by recognizing and measuring leases as of the adoption date with a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The Company is assessing the provisions of this amended guidance and has (i) formed an implementation team (ii) acquired a software solution to manage and account for leases under the new standard (iii) solicited feedback on the population of leases from business unit personnel and (iv) analyzed payment activity and general ledger accounts to further identify leases under the new standard. The Company is currently evaluating the impact of this amended guidance on its consolidated financial statements but does not anticipate any material changes to operating results or liquidity.

Landfill Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Summary of Liabilities for Final Closure and Post-Closure Costs

Liabilities for final closure and post-closure costs for the year ended December 31, 2017 and for the six months ended June 30, 2018 are shown in the table below:



Balance at December 31, 2016	$	191.1
Increase in retirement obligation	9.7
Accretion of closure and post-closure costs	15.4
Acquisition	28.3
Change in estimate	2.1
Costs incurred	(20.7		)
Balance at December 31, 2017	225.9
Increase in retirement obligation	4.7
Accretion of closure and post-closure costs	7.6
Costs incurred	(7.2		)
Balance at June 30, 2018	231.0
Less: Current portion	(20.2		)
	$	210.8

Earnings (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computation of Basic and Dilutive Earnings (Loss) Per Share

The following table sets forth the computation of basic earnings (loss) per share and earnings (loss) per share, assuming dilution:



		Three Months Ended June 30,					Six Months Ended June 30,
		2018		2017			2018		2017
Numerator:
	Net income (loss)	$	9.7	$	(0.2	)	$	11.8	$	(7.2	)
Denominator:
	Average common shares outstanding	88,555,647		88,275,698			88,535,860		88,206,590
	Other potentially dilutive common shares	717,319		—			611,477		—
	Average common shares outstanding, assuming dilution	89,272,966		88,275,698			89,147,337		88,206,590

	Basic net income (loss) per share	$	0.11	$	—		$	0.13	$	(0.08	)
	Diluted net income (loss) per share	$	0.11	$	—		$	0.13	$	(0.08	)

Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of Major Components of Debt

The following table summarizes the major components of debt at each balance sheet date and provides the maturities and interest rate ranges of each major category of debt:



	June 30, 2018			December 31, 2017
Revolving line of credit with lenders (Revolver), interest at applicable rate plus margin, as defined (6.75% and 6.25% at June 30, 2018 and December 31, 2017, respectively) due quarterly; balance due at maturity in November 2021	$	3.0		$	29.0
Term loans (Term Loan B); quarterly payments of $3.75 commencing March 31, 2017 through September 30, 2023 with final payment due November 10, 2023; interest at an alternate base rate or adjusted LIBOR rate with a 0.75% floor plus an applicable margin	1,430.0			1,460.0
Senior notes (Senior Notes) payable; interest at 5.625% payable in arrears semi-annually commencing May 15, 2017; maturing on November 15, 2024	425.0			425.0
Capital lease obligations, maturing through 2024	65.5			63.9
Other debt	9.6			11.8
	1,933.1			1,989.7
Less: Original issue discount and debt issuance costs classified as a reduction to long-term debt	(28.3		)	(31.4		)
Less: Current portion	(49.2		)	(74.1		)
	$	1,855.6		$	1,884.2

Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Fair Values of Derivative Instruments Recorded in Condensed Consolidated Balance Sheets

The following table summarizes the fair values of derivative instruments recorded in the Company’s condensed consolidated balance sheets:



	Balance Sheet Location	June 30, 2018		December 31, 2017
Derivatives Designated as Hedging Instruments
2017 Interest rate caps	Other assets	$	4.5	$	—
2017 Interest rate caps	Other long-term liabilities	—		(0.4		)
Derivatives Not Designated as Hedging Instruments
2016 Interest rate caps	Prepaid expenses and other current assets	6.5		0.9
2016 Interest rate caps	Other assets	2.2		2.8
Total derivatives		$	13.2	$	3.3

Segment and Related Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Summary of Financial Information Concerning Reportable Segments

Service revenues, operating income/(loss) and depreciation and amortization for the Company's reportable segments for the periods indicated are shown in the following tables:



	Service Revenues		Operating Income (Loss)			Depreciation and Amortization

Three Months Ended June 30, 2018
South	$	152.7	$	21.3		$	21.5
East	104.3		12.7			20.5
Midwest	141.1		18.6			26.1
Corporate	—		(17.6		)	1.1
	$	398.1	$	35.0		$	69.2

Three Months Ended June 30, 2017
South	$	139.6	$	24.0		$	19.7
East	100.2		(5.3		)	20.1
Midwest	143.3		20.6			25.2
Corporate	—		(15.2		)	2.5
	$	383.1	$	24.1		$	67.5


Six Months Ended June 30, 2018
South	301.6		47.3			43.2
East	193.6		10.9			38.4
Midwest	267.6		32.5			50.0
Corporate	—		(35.7		)	2.3
	$	762.8	$	55.0		$	133.9

Six Months Ended June 30, 2017
South	$	275.1	$	46.2		$	38.8
East	186.2		(7.9		)	37.7
Midwest	269.2		31.9			47.8
Corporate	—		(34.8		)	4.6
	$	730.5	$	35.4		$	128.9

Summary of Disaggregation of Revenue

The following table presents the Company's revenues disaggregated by major line of business. Recycling rebates paid to customers, franchise fees paid to customers and state landfill taxes are excluded from revenues.



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017 (1)		2018		2017 (1)
Residential Collection Revenue	$	101.7	$	97.5	$	201.1	$	191.0
Commercial Collection Revenue	93.9		92.0		186.0		182.6
Rolloff Collection Revenue	65.4		63.2		126.0		120.2
Disposal Revenue	73.4		73.5		130.5		128.8
Fuel and Environmental Charges	29.2		23.9		56.0		46.9
Sale of Recyclables	4.1		8.7		9.4		16.4
Other Revenue	30.4		24.3		53.8		44.6
	$	398.1	$	383.1	$	762.8	$	730.5

(1) Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company's historic accounting under Topic 605.

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s assets and liabilities that are measured at fair value on a recurring basis include the following:



				Fair Value Measurement at June 30, 2018 Reporting Date Using
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Carrying Value

Recurring fair value measurements
Cash and cash equivalents	$	6.9		$	6.9	$	—		$	6.9
Interest rate caps - asset position	13.2			—		13.2			13.2
Total recurring fair value measurements	$	20.1		$	6.9	$	13.2		$	20.1

				Fair Value Measurement at December 31, 2017 Reporting Date Using
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Carrying Value

Recurring fair value measurements
Cash and cash equivalents	$	6.8		$	6.8	$	—		$	6.8
Interest rate caps - asset position	3.7			—		3.7			3.7
Interest rate caps - liability position	(0.4		)	$	—	(0.4		)	(0.4		)
Total recurring fair value measurements	$	10.1		$	6.8	$	3.3		$	10.1

Estimated Fair Value of Company's Debt

The estimated fair value of the Company’s debt is as follows:



	June 30, 2018		December 31, 2017
Revolver	$	3.0	$	29.0
Senior Notes	422.9		435.1
Term Loan B	1,430.0		1,467.3
	$	1,855.9	$	1,931.4

- 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

Business Operations (Details) $ in Millions	3 Months Ended		6 Months Ended
Business Operations (Details) $ in Millions	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Segment company	Jun. 30, 2017 USD ($) acquisition
Business Acquisition [Line Items]
Number of reportable operating segments \| Segment			3
Number of geographic operating segments \| Segment			3
Assumption of long term care and closure reserve			$ 0.0	$ 24.0
Proceeds from sale of businesses			0.0	8.7
Gain on sale of business			$ 0.0	2.8
Certain collection services assets \| Charlotte, North Carolina \| Disposal group, disposed by sale
Business Acquisition [Line Items]
Proceeds from sale of businesses		$ 8.7		8.7
Gain on sale of business		$ 1.4		1.4
BFI Waste Systems of North America, LLC
Business Acquisition [Line Items]
Assumption of long term care and closure reserve				$ 24.0
Business Acquisition
Business Acquisition [Line Items]
Number of acquisitions completed			6	8
Consideration transferred			$ 5.9
Amount of notes payable incurred as part of consideration transferred			0.7
Consideration transferred, cash				$ 84.3
Consideration transferred, notes payable				$ 1.6
Redirection of waste
Business Acquisition [Line Items]
Environmental remediation expense	$ 5.4		5.4
Environmental remediation costs incurred			$ 3.4

Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Basis of Presentation (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Intangible asset impairment	$ 13.0	$ 0.0	$ 13.0

Revenue Recognition (Details) $ in Millions	3 Months Ended		6 Months Ended
Revenue Recognition (Details) $ in Millions	Jun. 30, 2018 USD ($) recycling_facility	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) recycling_facility	Jun. 30, 2017 USD ($)	Jan. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit	$ (588.7)		$ (588.7)			$ (603.3)
Decrease in service revenues	$ (398.1)	$ (383.1)	$ (762.8)	$ (730.5)
Number of recycling facilities \| recycling_facility	22		22
Capitalized sales commissions	$ 4.0		$ 4.0		$ 3.8
Capitalized sales commissions amortization	0.4		0.7
Recognized deferred revenue			67.9
Cumulative impact \| Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit					$ 2.8
Decrease in service revenues	$ 8.8		$ 16.8
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Term of standard service agreement			3 years
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Term of standard service agreement			5 years

Landfill Liabilities - Summary of Liabilities for Final Closure and Post-Closure Costs (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2016
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance	$ 225.9	$ 191.1
Increase in retirement obligation	4.7		$ 9.7
Accretion of closure and post-closure costs	7.6	$ 7.4	15.4
Acquisition			28.3
Change in estimate			2.1
Costs incurred	(7.2)		(20.7)
Ending balance	231.0		$ 191.1
Less: Current portion	(20.2)
Noncurrent portion	$ 210.8

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income (loss)	$ 9.7	$ (0.2)	$ 11.8	$ (7.2)
Denominator:
Average common shares outstanding (in shares)	88,555,647	88,275,698	88,535,860	88,206,590
Other potentially dilutive common shares (in shares)	717,319	0	611,477	0
Average common shares outstanding, assuming dilution (in shares)	89,272,966	88,275,698	89,147,337	88,206,590
Basic net income (loss) per share (in dollars per share)	$ 0.11	$ 0.00	$ 0.13	$ (0.08)
Diluted net income (loss) per share (in dollars per share)	$ 0.11	$ 0.00	$ 0.13	$ (0.08)
Stock option
Denominator:
Antidilutive stock awards excluded from calculation (in shares)	2,300,000	4,600,000	2,300,000	4,200,000

Debt - Summary of Major Components of Debt - Principal (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Capital lease obligations, maturing through 2024	$ 65.5	$ 63.9
Other debt	9.6	11.8
Long-term debt, gross	1,933.1	1,989.7
Less: Original issue discount	(28.3)	(31.4)
Less: Current portion	(49.2)	(74.1)
Long-term debt, less original issue discount and current maturities	1,855.6	1,884.2
Revolver
Debt Instrument [Line Items]
Long-term debt	3.0	29.0
Term Loan B
Debt Instrument [Line Items]
Long-term debt	1,430.0	1,460.0
Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 425.0	$ 425.0

Debt - Summary of Major Components of Debt - Interest Rates (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Revolver
Debt Instrument [Line Items]
Line of credit interest rate	6.75%	6.25%
Term Loan B
Debt Instrument [Line Items]
Debt periodic principal payment	$ 3,750	$ 3,750
Term Loan B \| LIBOR
Debt Instrument [Line Items]
Debt reference rate	0.75%	0.75%
Senior Notes
Debt Instrument [Line Items]
Debt interest rate	5.625%	5.625%

Debt - Additional Information (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Letters of credit outstanding	$ 32,300,000	$ 39,300,000
Revolver
Debt Instrument [Line Items]
Long-term debt	3,000,000	$ 29,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity	300,000,000.0
Letters of Credit
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity	$ 100,000,000.0

Derivative Instruments and Hedging Activities - Summary of Fair Values of Derivative Instruments Recorded in Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives	$ 13.2	$ 3.3
Interest rate caps \| Derivatives Designated as Hedging Instruments \| Other assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets	4.5	0.0
Interest rate caps \| Derivatives Designated as Hedging Instruments \| Other long-term liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities	0.0	(0.4)
Interest rate caps \| Derivatives Not Designated as Hedging Instruments \| Other assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets	2.2	2.8
Interest rate caps \| Derivatives Not Designated as Hedging Instruments \| Prepaid expenses and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets	$ 6.5	$ 0.9

Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Nov. 30, 2017 USD ($) Agreement	May 31, 2016 USD ($) Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Premium payment period			33 months
Interest rate caps \| Derivatives Designated as Hedging Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate cap agreements \| Agreement					2
Premium included in other assets from condensed consolidated balance sheet					$ 4.9
Effective portion recorded in other comprehensive income	$ 1.0		$ 3.2
Gain related to interest rate caps			3.8
Notional amounts of the contracts	600.0		600.0
Interest rate caps \| Derivatives Designated as Hedging Instruments \| Other income (expense), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Ineffective portion recorded in other income (expense), net			0.6
Interest rate caps \| Derivatives Not Designated as Hedging Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate cap agreements \| Agreement						3
Premium included in other assets from condensed consolidated balance sheet						$ 5.5
Notional amounts of the contracts	800.0		800.0
Interest rate caps \| Derivatives Not Designated as Hedging Instruments \| Other income (expense), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) due to changes in fair value of derivative instruments	$ 1.4	$ (2.0)	$ 6.0	$ (3.3)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate continuing operations	27.60%	33.30%	27.60%	40.00%
Federal statutory tax rate	21.00%	35.00%	21.00%	35.00%
Liabilities associated with unrecognized tax benefits and related interest	$ 31.0		$ 31.0
Taxation of deemed repatriation on foreign earnings					$ 0.1

Commitments and Contingencies (Details) - USD ($)	3 Months Ended		6 Months Ended
Commitments and Contingencies (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Site Contingency [Line Items]
Percentage of workforce covered under collective bargaining	14.30%		14.30%
Waste slide
Site Contingency [Line Items]
Benefit in operating expenses due to higher insurance recoveries	$ 3,700,000	$ 0
Environmental remediation expense			$ 100,000	$ 5,400,000
Environmental remediation costs incurred			$ 6,400,000

Segment and Related Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2018 Segment
Segment Reporting [Abstract]
Number of reportable segments	3
Number of geographic operating segments	3

Segment and Related Information - Summary of Financial Information Concerning Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Service revenues	$ 398.1	$ 383.1	$ 762.8	$ 730.5
Operating Income (Loss)	35.0	24.1	55.0	35.4
Depreciation and Amortization	69.2	67.5	133.9	128.9
Operating Segments \| South
Segment Reporting Information [Line Items]
Service revenues	152.7	139.6	301.6	275.1
Operating Income (Loss)	21.3	24.0	47.3	46.2
Depreciation and Amortization	21.5	19.7	43.2	38.8
Operating Segments \| East
Segment Reporting Information [Line Items]
Service revenues	104.3	100.2	193.6	186.2
Operating Income (Loss)	12.7	(5.3)	10.9	(7.9)
Depreciation and Amortization	20.5	20.1	38.4	37.7
Operating Segments \| Midwest
Segment Reporting Information [Line Items]
Service revenues	141.1	143.3	267.6	269.2
Operating Income (Loss)	18.6	20.6	32.5	31.9
Depreciation and Amortization	26.1	25.2	50.0	47.8
Corporate
Segment Reporting Information [Line Items]
Service revenues	0.0	0.0	0.0	0.0
Operating Income (Loss)	(17.6)	(15.2)	(35.7)	(34.8)
Depreciation and Amortization	$ 1.1	$ 2.5	$ 2.3	$ 4.6

Segment and Related Information - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 398.1	$ 383.1	$ 762.8	$ 730.5
Residential Collection Revenue
Disaggregation of Revenue [Line Items]
Revenue	101.7	97.5	201.1	191.0
Commercial Collection Revenue
Disaggregation of Revenue [Line Items]
Revenue	93.9	92.0	186.0	182.6
Rolloff Collection Revenue
Disaggregation of Revenue [Line Items]
Revenue	65.4	63.2	126.0	120.2
Disposal Revenue
Disaggregation of Revenue [Line Items]
Revenue	73.4	73.5	130.5	128.8
Sale of Recyclables
Disaggregation of Revenue [Line Items]
Revenue	29.2	23.9	56.0	46.9
Fuel and Environmental Charges
Disaggregation of Revenue [Line Items]
Revenue	4.1	8.7	9.4	16.4
Other Revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 30.4	$ 24.3	$ 53.8	$ 44.6

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Total Fair Value
Recurring fair value measurements
Cash and cash equivalents	$ 6.9	$ 6.8
Interest rate caps - asset position	13.2	3.7
Interest rate caps - liability position		(0.4)
Total recurring fair value measurements	20.1	10.1
Total Fair Value \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring fair value measurements
Cash and cash equivalents	6.9	6.8
Interest rate caps - asset position	0.0	0.0
Interest rate caps - liability position		0.0
Total recurring fair value measurements	6.9	6.8
Total Fair Value \| Significant Other Observable Inputs (Level 2)
Recurring fair value measurements
Cash and cash equivalents	0.0	0.0
Interest rate caps - asset position	13.2	3.7
Interest rate caps - liability position		(0.4)
Total recurring fair value measurements	13.2	3.3
Carrying Value
Recurring fair value measurements
Cash and cash equivalents	6.9	6.8
Interest rate caps - asset position	13.2	3.7
Interest rate caps - liability position		(0.4)
Total recurring fair value measurements	$ 20.1	$ 10.1

Fair Value Measurements - Estimated Fair Value of Company's Debt (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt instruments carrying value	$ 1,858.0	$ 1,914.0
Significant Other Observable Inputs (Level 2)
Debt Instrument [Line Items]
Estimated fair value debt	1,855.9	1,931.4
Significant Other Observable Inputs (Level 2) \| Revolver
Debt Instrument [Line Items]
Estimated fair value debt	3.0	29.0
Significant Other Observable Inputs (Level 2) \| Senior Notes
Debt Instrument [Line Items]
Estimated fair value debt	422.9	435.1
Significant Other Observable Inputs (Level 2) \| Term Loan B
Debt Instrument [Line Items]
Estimated fair value debt	$ 1,430.0	$ 1,467.3