$ 3,657.6

$ 3,788.0

$ 10,574.4

$ 10,861.2

37.6

34.2

113.8

99.0

36.0

32.6

105.7

102.3

0.6

0.5

1.6

1.5

3,537.1

3,717.5

10,379.6

10,698.8

0.0

0.1

50.4

0.2

(0.5)

0.1

(0.7)

120.7

70.0

195.0

212.1

0.8

0.2

2.4

0.8

(15.3)

(13.2)

(42.1)

(39.6)

(14.8)

0.0

(14.8)

0.0

(0.1)

0.0

0.1

(29.4)

(13.0)

(54.5)

(38.7)

91.3

57.0

140.5

173.4

22.1

12.0

33.3

37.3

Basic and Diluted Earnings Per Common Share

$ 69.2

$ 45.0

$ 107.2

$ 136.1

Basic (in dollars per share)

$ 2.20

$ 1.40

$ 3.35

$ 4.15

Diluted (in dollars per share)

$ 2.18

$ 1.38

$ 3.33

$ 4.11

Weighted-Average Common Shares Outstanding:

Basic (in shares)

31,447

32,213

31,961

32,815

Diluted (in shares)

31,704

32,536

32,189

33,142

Supplemental information:

Excise taxes

$ 498.9

$ 464.1

$ 1,452.5

$ 1,364.8

Product

^[1]

2,965.5

3,151.5

8,595.0

8,982.8

^[1]

2,749.6

2,991.3

8,104.8

8,584.9

Merchandise sales

681.1

623.7

1,946.1

1,807.5

569.9

519.2

1,631.9

1,509.2

Other operating revenues

11.0

12.8

33.3

70.9

$ 143.4

$ 139.7

$ 421.8

$ 401.9

[1]	Includes excise taxes of $498.9 for the three months ended June 30, 2019, $464.1 for the three months ended June 30, 2018, $1,452.5 for the six months ended June 30, 2019 and $1,364.8 for the six months ended June 30, 2018.

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Operating Activities
Net income (loss)	$ 69.2	$ 32.7	$ 5.3	$ 45.0	$ 51.8	$ 39.3	$ 107.2	$ 136.1
Adjustments to reconcile net income (loss) to net cash provided by (required by) operating activities
Depreciation and amortization	37.6			34.2			113.8	99.0
Deferred and noncurrent income tax charges (credits)							6.9	13.9
Accretion of asset retirement obligations	0.6			0.5			1.6	1.5	$ 2.0
Pretax (gains) losses from sale of assets	(0.2)			0.5			(0.1)	0.7
Net (increase) decrease in noncash operating working capital							(3.7)	(15.8)
Loss on early debt extinguishment	14.8			0.0			14.8	0.0
Other operating activities - net							11.1	6.0
Net cash provided by (required by) operating activities							251.6	241.4
Investing Activities
Property additions							(153.7)	(163.0)
Proceeds from sale of assets							2.4	1.2
Other investing activities - net							(0.7)	(5.9)
Net cash provided by (required by) investing activities							(152.0)	(167.7)
Financing Activities
Purchase of treasury stock							(139.1)	(144.4)
Borrowings of debt							693.7	0.0
Repayments of debt							(573.1)	(15.9)
Debt issuance costs							(3.1)	0.0
Early debt extinguishment costs							(10.4)	0.0
Amounts related to share-based compensation							(4.4)	(8.0)
Net cash provided by (required by) financing activities							(36.4)	(168.3)
Net increase (decrease) in cash, cash equivalents, and restricted cash							63.2	(94.6)
Cash, cash equivalents, and restricted cash at beginning of period			184.5			170.0	184.5	170.0	170.0
Cash, cash equivalents, and restricted cash at end of period	247.7			75.4			247.7	75.4	184.5
Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents										$ 247.7	$ 184.5	$ 75.4	$ 170.0
Restricted cash										0.0	0.0	0.0	0.0
Cash, cash equivalents, and restricted cash	$ 247.7		$ 184.5	$ 75.4		$ 170.0	$ 184.5	$ 75.4	$ 184.5	$ 247.7	$ 184.5	$ 75.4	$ 170.0

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	APIC	Retained Earnings
Balance (in shares) at Dec. 31, 2017		46,767,164
Beginning balance at Dec. 31, 2017	$ 738.4	$ 0.5	$ (806.5)	$ 549.9	$ 994.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	39.3				39.3
Purchase of treasury stock	(71.7)		(71.7)
Issuance of treasury stock	0.0		4.4	(4.4)
Amounts related to share-based compensation	(2.9)			(2.9)
Share-based compensation expense	2.2			2.2
Balance (in shares) at Mar. 31, 2018		46,767,164
Ending balance at Mar. 31, 2018	705.3	$ 0.5	(873.8)	544.8	1,033.8
Balance (in shares) at Dec. 31, 2017		46,767,164
Beginning balance at Dec. 31, 2017	738.4	$ 0.5	(806.5)	549.9	994.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	136.1
Balance (in shares) at Sep. 30, 2018		46,767,164
Ending balance at Sep. 30, 2018	728.9	$ 0.5	(941.6)	539.4	1,130.6
Balance (in shares) at Mar. 31, 2018		46,767,164
Beginning balance at Mar. 31, 2018	705.3	$ 0.5	(873.8)	544.8	1,033.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	51.8				51.8
Purchase of treasury stock	(72.7)		(72.7)
Issuance of treasury stock	0.0		0.6	(0.6)
Amounts related to share-based compensation	(0.5)			(0.5)
Share-based compensation expense	2.4			2.4
Balance (in shares) at Jun. 30, 2018		46,767,164
Ending balance at Jun. 30, 2018	686.3	$ 0.5	(945.9)	546.1	1,085.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	45.0				45.0
Purchase of treasury stock	0.0		0.0
Issuance of treasury stock	0.0		4.3	(4.3)
Amounts related to share-based compensation	(4.6)			(4.6)
Share-based compensation expense	2.2			2.2
Balance (in shares) at Sep. 30, 2018		46,767,164
Ending balance at Sep. 30, 2018	728.9	$ 0.5	(941.6)	539.4	1,130.6
Balance (in shares) at Dec. 31, 2018		46,767,164
Beginning balance at Dec. 31, 2018	807.3	$ 0.5	(940.3)	539.0	1,208.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5.3				5.3
Purchase of treasury stock	(13.3)		(13.3)
Issuance of treasury stock	0.0		5.6	(5.6)
Amounts related to share-based compensation	(4.1)			(4.1)
Share-based compensation expense	2.6			2.6
Balance (in shares) at Mar. 31, 2019		46,767,164
Ending balance at Mar. 31, 2019	797.8	$ 0.5	(948.0)	531.9	1,213.4
Balance (in shares) at Dec. 31, 2018		46,767,164
Beginning balance at Dec. 31, 2018	807.3	$ 0.5	(940.3)	539.0	1,208.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	107.2
Balance (in shares) at Sep. 30, 2019		46,767,164
Ending balance at Sep. 30, 2019	779.0	$ 0.5	(1,073.2)	536.4	1,315.3
Balance (in shares) at Mar. 31, 2019		46,767,164
Beginning balance at Mar. 31, 2019	797.8	$ 0.5	(948.0)	531.9	1,213.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	32.7				32.7
Purchase of treasury stock	(16.8)		(16.8)
Issuance of treasury stock	0.0		0.1	(0.1)
Amounts related to share-based compensation	(0.2)			(0.2)
Share-based compensation expense	2.8			2.8
Balance (in shares) at Jun. 30, 2019		46,767,164
Ending balance at Jun. 30, 2019	816.3	$ 0.5	(964.7)	534.4	1,246.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	69.2				69.2
Purchase of treasury stock	(109.0)		(109.0)
Issuance of treasury stock	0.0		0.5	(0.5)
Amounts related to share-based compensation	(0.1)			(0.1)
Share-based compensation expense	2.6			2.6
Balance (in shares) at Sep. 30, 2019		46,767,164
Ending balance at Sep. 30, 2019	$ 779.0	$ 0.5	$ (1,073.2)	$ 536.4	$ 1,315.3

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Revenue from Contract with Customer [Abstract]

Description of Business and Basis of Presentation	9 Months Ended
Description of Business and Basis of Presentation	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of business — Murphy USA Inc. and its consolidated subsidiaries (“Murphy USA” or the “Company”) markets refined products through a network of retail gasoline stations and to unbranded wholesale customers. Murphy USA’s owned retail stations are almost all located in close proximity to Walmart stores in 26 states and use the brand name Murphy USA®. Murphy USA also markets gasoline and other products at standalone stations under the Murphy Express brand. At September 30, 2019, Murphy USA had a total of 1,479 Company stations of which 1,160 were Murphy USA and 319 were Murphy Express. Basis of Presentation — Murphy USA was incorporated in March 2013 and, in connection with its incorporation, Murphy USA issued 100 shares of common stock, par value $0.01 per share, to Murphy Oil Corporation (“Murphy Oil”) for $1.00. On August 30, 2013, Murphy USA was separated from Murphy Oil through the distribution of 100% of the common stock of Murphy USA to holders of Murphy Oil stock. In preparing the financial statements of Murphy USA in conformity with accounting principles generally accepted in the United States, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities. Actual results may differ from these estimates. Interim Financial Information — The interim period financial information presented in these consolidated financial statements is unaudited and includes all known accruals and adjustments, in the opinion of management, necessary for a fair presentation of the consolidated financial position of Murphy USA and its results of operations and cash flows for the periods presented. All such adjustments are of a normal and recurring nature. These interim consolidated financial statements should be read together with our audited financial statements for the years ended December 31, 2018, 2017 and 2016, included in our Annual Report on Form 10-K (File No. 001-35914), as filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934 on February 19, 2019. Recently Issued Accounting Standards— In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)" (“ASU 2016-02”). ASU 2016-02 amends the existing accounting standards for lease accounting by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under current GAAP. ASU 2016-02 requires that a lessee should recognize a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on the balance sheet. We adopted ASU 2016-02 as of January 1, 2019, using the modified retrospective approach. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. We also elected the practical expedient related to land easements, allowing us to carry forward our accounting treatment for land easements on existing agreements. In addition, we elected the hindsight practical expedient to determine the lease term for existing leases. Our election of the hindsight practical expedient resulted in the shortening of lease terms for certain existing leases and the useful lives of corresponding leasehold improvements. In our application of hindsight, we evaluated the performance of the leased stores and the associated markets in relation to our overall real estate strategies, which resulted in the determination that renewal options would not be reasonably certain in determining the expected lease term. Adoption of the new standard resulted in the recording of additional net lease assets and lease liabilities of approximately $110.4 million and $110.7 million, respectively. The standard did not materially impact our consolidated net earnings and had no impact on cash flows. See Note 13 "Lease Accounting" for further details. In August 2018, the FASB issued ASU 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract". This ASU aligns the accounting treatment for capitalizing implementation costs incurred by customers in cloud computing arrangements in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This guidance is effective for the Company on January 1, 2020. Early adoption is permitted. The amendments in this update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is currently assessing the effect that this ASU will have on our financial position, results of operations, and disclosures but does not expect this update to have a material impact on the Company's consolidated financial statements.

Revenues

9 Months Ended

Sep. 30, 2019

Revenues

Revenue Recognition

Revenue is recognized when obligations under the terms of a contract with our customers are satisfied; generally, this occurs with the transfer of control of our petroleum products, convenience merchandise, Renewable Identification Numbers ("RINs") and other assets to our third-party customers. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Excise and sales tax that we collect where we have determined we are the principal in the transaction have been recorded as revenue on a jurisdiction-by-jurisdiction basis.

The Company enters into buy/sell and similar arrangements when petroleum products are held at one location but are needed at a different location. The Company often pays or receives funds related to the buy/sell arrangements based on location or quality differences. The Company continues to account for these transactions as non-monetary exchanges under existing accounting guidance and typically reports these on a net basis in the Consolidated Statements of Income.

The following tables disaggregates our revenue by major source for the three and nine months ended September 30, 2019 and 2018, respectively:



	Three Months Ended September 30, 2019						Three Months Ended September 30, 2018
(Millions of dollars)	Marketing		Corporate and Other Assets		Consolidated		Marketing		Corporate and Other Assets		Consolidated
Petroleum product sales (at retail) ¹	$	2,660.8	$	—	$	2,660.8	$	2,770.1	$	—	$	2,770.1
Petroleum product sales (at wholesale)	304.7		—		304.7		381.4		—		381.4
Total petroleum product sales	2,965.5		—		2,965.5		3,151.5		—		3,151.5
Merchandise sales	681.1		—		681.1		623.7		—		623.7
Other operating revenues:
RINs	8.6		—		8.6		11.6		—		11.6
Other revenues ²	2.4		—		2.4		1.2		—		1.2
Total revenues	$	3,657.6	$	—	$	3,657.6	$	3,788.0	$	—	$	3,788.0



	Nine Months Ended September 30, 2019						Nine Months Ended September 30, 2018
(Millions of dollars)	Marketing		Corporate and Other Assets		Consolidated		Marketing		Corporate and Other Assets		Consolidated
Petroleum product sales (at retail) ¹	$	7,717.7	$	—	$	7,717.7	$	7,910.6	$	—	$	7,910.6
Petroleum product sales (at wholesale)	877.3		—		877.3		1,072.2		—		1,072.2
Total petroleum product sales	8,595.0		—		8,595.0		8,982.8		—		8,982.8
Merchandise sales	1,946.1		—		1,946.1		1,807.5		—		1,807.5
Other operating revenues:
RINs	28.6		—		28.6		67.3		—		67.3
Other revenues ²	4.6		0.1		4.7		3.1		0.5		3.6
Total revenues	$	10,574.3	$	0.1	$	10,574.4	$	10,860.7	$	0.5	$	10,861.2

¹ Includes excise and sales taxes that remain eligible for inclusion under Topic 606

² Primarily includes collection allowance on excise and sales taxes and other miscellaneous items

Marketing segment

Petroleum product sales (at retail). For our retail store locations, the revenue related to petroleum product sales is recognized as the fuel is pumped to our customers. The transaction price at the pump typically includes some portion of sales or excise taxes as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. Our customers typically use a mixture of cash, checks, credit cards and debit cards to pay for our products as they are received. We have accounts receivable from the various credit/debit card providers at any point in time related to product sales made on credit cards and debit cards. These receivables are typically collected in two to seven days, depending on the terms with the particular credit/debit card providers. Payment fees retained by the credit/debit card providers are recorded as station and other operating expenses.

Petroleum product sales (at wholesale). Our sales of petroleum products at wholesale are generally recorded as revenue when the deliveries have occurred and legal ownership of the product has transferred to the customer. Title transfer for bulk refined product sales typically occurs at pipeline custody points and upon trucks loading at product terminals. For bulk pipeline sales, we record receivables from customers that are generally collected within a week from custody transfer date. For our rack product sales, the majority of our customers' accounts are drafted by us within 10 days from product transfer.

Merchandise sales. For our retail store locations, the revenue related to merchandise sales is recognized as the customer completes their purchase at our locations. The transaction price typically includes some portion of sales tax as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. As noted above, a mixture of payment types are used for these revenues and the same terms for credit/debit card receivables are realized.

The most significant judgment with respect to merchandise sales revenue is determining whether we are the principal or agent for some categories of merchandise such as lottery tickets, lotto tickets, newspapers and other small categories of merchandise. For scratch-off lottery tickets, we have determined we are the principal in the majority of the jurisdictions and therefore we record those sales on a gross basis. We have some categories of merchandise (such as lotto tickets) where we are the agent and the revenues recorded for those transactions are our net commission only.

In June 2018, the Company initiated a loyalty pilot program through a limited number of its retail locations. The customers earn rewards based on their spending or other promotional activities. This program creates a performance obligation which requires us to defer a portion of sales revenue to the loyalty program participants until they redeem their rewards. The rewards may be redeemed for merchandise or cash discounts on fuel purchases. The program was rolled out chain-wide in March 2019. The deferred revenues recorded in the three and nine months ended September 30, 2019 were immaterial.

RINs sales. For the sale of RINs, we recognize revenue when the RIN is transferred to the counter-party and the sale is completed. Receivables from our counter-parties related to the RIN sales are typically collected within five days of the sale.

Other revenues. Items reported as other operating revenues include collection allowances for excise and sales tax and other miscellaneous items and are recognized as revenue when the transaction is completed.

Accounts receivable

Trade accounts receivable on the balance sheet represents both receivables related to contracts with customers and other trade receivables. At September 30, 2019 and December 31, 2018, we had $96.2 million and $79.4 million of receivables, respectively, related to contracts with customers recorded. All of the trade accounts receivable related to contracts with customers outstanding at the end of each period were collected during the succeeding quarter. These receivables were generally related to credit and debit card transactions along with short term bulk and wholesale sales to our customers, which have a very short settlement window.

Inventories

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:



(Millions of dollars)	September 30, 2019			December 31, 2018
Finished products - First-In, First-Out ("FIFO") basis	$	276.6		$	219.4
Less: Last-In, First-Out ("LIFO") reserve - finished products	(162.9		)	(115.5		)
Finished products - LIFO basis	113.7			103.9
Store merchandise for resale	113.5			107.2
Materials and supplies	6.6			10.4
Total inventories	$	233.8		$	221.5

At September 30, 2019 and December 31, 2018, the replacement cost (market value) of LIFO inventories exceeded the LIFO carrying value by $162.9 million and $115.5 million, respectively.

Long-Term Debt

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt consisted of the following:



(Millions of dollars)	September 30, 2019			December 31, 2018
6.00% senior notes due 2023 (net of unamortized discount of $4.1 at December 2018)	$	—		$	495.9
5.625% senior notes due 2027 (net of unamortized discount of $2.8 at September 30, 2019 and $3.1 at December 2018)	297.1			296.9
4.75% senior notes due 2029 (net of unamortized discount of $6.2 at September 30, 2019)	493.8			—
Term loan due 2023 (effective interest rate of 4.57% at September 30, 2019)	200.0			—
Term loan due 2020 (effective interest rate of 5.0% at December 31,2018)	—			72.0
Capitalized lease obligations, vehicles, due through 2022	2.5			2.3
Less unamortized debt issuance costs	(5.7		)	(3.8		)
Total long-term debt	987.7			863.3
Less current maturities	21.3			21.2
Total long-term debt, net of current	$	966.4		$	842.1

Senior Notes

On April 25, 2017, Murphy Oil USA, Inc., our primary operating subsidiary, issued $300 million of 5.625% Senior Notes due 2027 (the "2027 Senior Notes") under its existing shelf registration statement. The 2027 Senior Notes are fully and unconditionally guaranteed by Murphy USA, and are guaranteed by certain 100% owned subsidiaries that guarantee our credit facilities. The indenture governing the 2027 Senior Notes contains restrictive covenants that limit, among other things, the ability of Murphy USA, Murphy Oil USA, Inc. and the restricted subsidiaries to incur additional indebtedness or liens, dispose of assets, make certain restricted payments or investments, enter into transactions with affiliates or merge with or into other entities.

On September 13, 2019, Murphy Oil USA, Inc., consummated a partial tender offer on its 6.00% $500 million Senior Notes due 2023 (the “2023 Senior Notes”). Following the completion of the tender offer, Murphy Oil USA, Inc. called the remaining 2023 Senior Notes and satisfied and discharged the indenture governing the 2023 Senior Notes. We paid a total of $514.5 million which included a call premium and all applicable accrued and unpaid interest. The call premium and unamortized debt discount and issuance costs were reported as Loss on early debt extinguishment in the consolidated income statements for the period ended September 30, 2019.

On September 13, 2019, Murphy Oil USA, Inc., issued $500 million of 4.75% Senior Notes due 2029 (the “2029 Senior Notes”). The net proceeds from the issuance of the 2029 Senior Notes were used to fund, in part, the tender offer and redemption of the 2023 Senior Notes. The 2029 Senior Notes are fully and unconditionally guaranteed by Murphy USA, and are guaranteed by certain 100% owned subsidiaries that guarantee our credit facilities. The indenture governing the 2029 Senior Notes contains restrictive covenants that are essentially identical to the covenants for the 2027 Senior Notes.

The 2027 and 2029 Senior Notes and the guarantees rank equally with all of our and the guarantors’ existing and future senior unsecured indebtedness and effectively junior to our and the guarantors’ existing and future secured indebtedness (including indebtedness with respect to the credit facilities) to the extent of the value of the assets securing such indebtedness. The 2027 and 2029 Senior Notes are structurally subordinated to all of the existing and future third-party liabilities, including trade payables, of our existing and future subsidiaries that do not guarantee the notes.

Credit Facilities and Term Loan

In August 2019, we amended and extended our existing credit agreement. The effective date of the agreement was extended to August, 2024. The credit agreement provides for a committed $325 million asset-based loan (ABL) facility (with availability subject to the borrowing base described below) and a $200 million term loan facility with an additional $50 million available until December 31, 2019. It also provides for a $150 million uncommitted incremental facility. On August 27, 2019, Murphy Oil USA, Inc. borrowed $200 million under the term loan facility that has a four-year term with a current outstanding principal of $200 million and prepaid the remaining balance of the prior term loan of $57 million. As of September 30, 2019, we have zero outstanding under our ABL facility.

The borrowing base is, at any time of determination, the amount (net of reserves) equal to the sum of:

• 100% of eligible cash at such time, plus

• 90% of eligible credit card receivables at such time, plus

• 90% of eligible investment grade accounts, plus

• 85% of eligible other accounts, plus

• 80% of eligible midstream refined products inventory at such time, plus

• 75% of eligible retail refined products inventory at such time, plus

the lesser of (i) 70% of the average cost of eligible retail merchandise inventory at such time and (ii) 85% of the net orderly liquidation value of eligible retail merchandise inventory at such time.

The ABL facility includes a $100 million sublimit for the issuance of letters of credit. Letters of credit issued under the ABL facility reduce availability under the ABL facility.

Interest payable on the credit facilities is based on either:


•	the London interbank offered rate, adjusted for statutory reserve requirements (the “Adjusted LIBO Rate”);

or


•	the Alternate Base Rate, which is defined as the highest of (a) the prime rate, (b) the greater of the federal funds effective rate and the overnight bank funding rate determined by the Federal Reserve Bank of New York from time to time plus 0.50% per annum and (c) the one-month Adjusted LIBO Rate plus 1.00% per annum,

plus, (A) in the case of Adjusted LIBO Rate borrowings, (i) with respect to the ABL facility, spreads ranging from 1.50% to 2.00% per annum depending on a total debt to EBITDA ratio under the ABL facility or (ii) with respect to the term loan facility, spreads ranging from 2.50% to 2.75% per annum depending on a total debt to EBITDA ratio and (B) in the case of Alternate Base Rate borrowings, (i) with respect to the ABL facility, spreads ranging from 0.50% to 1.00% per annum depending on a total debt to EBITDA ratio or (ii) with respect to the term loan facility, spreads ranging from 1.50% to 1.75% per annum depending on a total debt to EBITDA ratio.

The interest rate period with respect to the Adjusted LIBO Rate interest rate option can be set at one, two, three, or six months as selected by us in accordance with the terms of the credit agreement.

The credit agreement contains certain covenants that limit, among other things, the ability of us and our subsidiaries to incur additional indebtedness or liens, to make certain investments, to enter into sale-leaseback transactions, to make certain restricted payments, to enter into consolidations, mergers or sales of material assets and other fundamental changes, to transact with affiliates, to enter into agreements restricting the ability of subsidiaries to incur liens or pay dividends, or to make certain accounting changes. In addition, the credit agreement requires us to maintain a minimum fixed charge coverage ratio of 1.0 to 1.0 when availability for at least three consecutive business days is less than the greater of (a) 17.5% of the lesser of the aggregate ABL facility commitments and the borrowing base and (b) $70 million (including as of the most recent fiscal quarter end on the first date when availability is less than such amount), as well as a maximum secured total debt to EBITDA ratio of 4.5 to 1.0 at any time when term facility commitments or term loans are outstanding. As of September 30, 2019, our fixed charge coverage ratio was 1.1. Our secured debt to EBITDA ratio as of September 30, 2019 was 0.43 to 1.0.

The credit agreement contains restrictions on certain payments, including dividends, when availability under the credit agreement is less than or equal to the greater of $100 million and 25% of the lesser of the revolving commitments and the borrowing base and our fixed charge coverage ratio is less than 1.0 to 1.0 (unless availability under the credit agreement is greater than $100 million and 40% of the lesser of the revolving commitments and the borrowing base). As of September 30, 2019 and December 31, 2018, our ability to make restricted payments was not limited as our fixed charge coverage ratio was greater than 1.0 to 1.0.

All obligations under the credit agreement are guaranteed by Murphy USA and the subsidiary guarantors party thereto, and all obligations under the credit agreement, including the guarantees of those obligations, are secured by certain assets of Murphy USA, Murphy Oil USA, Inc. and the guarantors party thereto.

Asset Retirement Obligations (ARO)

9 Months Ended

Sep. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations (ARO)

The majority of the ARO recognized by the Company at September 30, 2019 and December 31, 2018 is related to the estimated costs to dismantle and abandon certain of its retail gasoline stations. The Company has not recorded an ARO for certain of its marketing assets because sufficient information is presently not available to estimate a range of potential settlement dates for the obligation. These assets are consistently being upgraded and are expected to be operational into the foreseeable future. In these cases, the obligation will be initially recognized in the period in which sufficient information exists to estimate the obligation.

A reconciliation of the beginning and ending aggregate carrying amount of the ARO is shown in the following table.



(Millions of dollars)	September 30, 2019			December 31, 2018
Balance at beginning of period	$	30.7		$	28.2
Accretion expense	1.6			2.0
Settlements of liabilities	(0.2		)	(0.3		)
Liabilities incurred	0.2			0.8
Balance at end of period	$	32.3		$	30.7

The estimation of future ARO is based on a number of assumptions requiring professional judgment. The Company cannot predict the type of revisions to these assumptions that may be required in future periods due to the lack of availability of additional information.

Income Taxes

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

The effective tax rate is calculated as the amount of income tax expense (benefit) divided by income before income tax expense (benefit). For the three and nine month periods ended September 30, 2019 and 2018, the Company’s approximate effective tax rates were as follows:



	2019	2018
Three months ended September 30,	24.2%	21.1%
Nine months ended September 30,	23.7%	21.5%

In the nine months ended September 30, 2019, the Company recognized approximately $0.9 million of excess tax benefits related to stock compensation for employees. For the nine months ended September 30, 2018, the Company recognized a tax benefit of approximately $2.8 million of excess tax benefits related to stock compensation and a tax benefit of approximately $2.7 million related to the settlement of prior year state uncertain tax positions.

The Company was included in Murphy Oil’s tax returns for the periods prior to the separation. The statute of several jurisdictions remains subject to audit by taxing authorities. As of September 30, 2019, the earliest year

remaining open for federal examination is 2016 and for certain states it ranges from 2013-2017. In addition to the pre-separation state returns being open under statute, certain federal and state tax returns post separation are also open under statute for examination. Although the Company believes that recorded liabilities for uncertain tax positions are adequate, additional gains or losses could occur in future periods from resolution of outstanding unsettled matters.

Incentive Plans	9 Months Ended
Incentive Plans	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Incentive Plans	Incentive Plans 2013 Long-Term Incentive Plan Effective August 30, 2013, certain of our employees participate in the Murphy USA 2013 Long-Term Incentive Plan which was subsequently amended and restated effective as of February 8, 2017 (the “MUSA 2013 Plan”). The MUSA 2013 Plan authorizes the Executive Compensation Committee of our Board of Directors (“the Committee”) to grant non-qualified or incentive stock options, stock appreciation rights, stock awards (including restricted stock and restricted stock unit awards), cash awards, and performance awards to our employees. No more than 5.5 million shares of MUSA common stock may be delivered under the MUSA 2013 Plan and no more than 1 million shares of common stock may be awarded to any one employee, subject to adjustment for changes in capitalization. The maximum cash amount payable pursuant to any “performance-based” award to any participant in any calendar year is $5.0 million. On February 6, 2019, the Committee granted nonqualified stock options for 99,400 shares at an exercise price of $76.15 per share under the terms of the MUSA 2013 Plan. The Black-Scholes valuation for these awards is $20.48 per option. The Committee also awarded time-based restricted stock units and performance-based restricted stock units (performance units) to certain employees on the same date. There were 26,550 time-based restricted units granted at a grant date fair value of $76.15 along with 53,100 performance units. Half of the performance units vest based on a 3-year return on average capital employed (ROACE) calculation and the other half vest based on a 3-year total shareholder return (TSR) calculation that compares MUSA to a group of 16 peer companies. The portion of the awards that vest based on TSR qualify as a market condition and must be valued using a Monte Carlo valuation model. For the TSR portion of the awards, the fair value was determined to be $100.65 per unit. For the ROACE portion of the awards, the valuation will be based on the grant date fair value of $76.15 per unit and the number of awards will be periodically assessed to determine the probability of vesting. On March 26, 2019, the Committee also granted 46,725 time-based restricted stock units granted to certain employees with a grant date fair value of $82.84 per unit. 2013 Stock Plan for Non-employee Directors Effective August 8, 2013, Murphy USA adopted the 2013 Murphy USA Stock Plan for Non-employee Directors (the “Directors Plan”). The directors for Murphy USA are compensated with a mixture of cash payments and equity-based awards. Awards under the Directors Plan may be in the form of restricted stock, restricted stock units, stock options, or a combination thereof. An aggregate of 500,000 shares of common stock shall be available for issuance of grants under the Directors Plan. During the first quarter of 2019, the Company issued 13,086 restricted stock units to its non-employee directors at a grant date fair value of $76.63 per share. These shares vest in three years from the grant date. For the nine months ended September 30, 2019 and 2018, share-based compensation was $8.0 million and $6.8 million, respectively. The income tax benefit realized for the tax deductions from options exercised for the nine months ended September 30, 2019 and 2018 was $0.1 million and $2.1 million, respectively.

Financial Instruments and Risk Management	9 Months Ended
Financial Instruments and Risk Management	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments and Risk Management	Financial Instruments and Risk Management DERIVATIVE INSTRUMENTS — The Company makes limited use of derivative instruments to manage certain risks related to commodity prices. The use of derivative instruments for risk management is covered by operating policies and is closely monitored by the Company’s senior management. The Company does not hold any derivatives for speculative purposes and it does not use derivatives with leveraged or complex features. Derivative instruments are traded primarily with credit worthy major financial institutions or over national exchanges such as the New York Mercantile Exchange (“NYMEX”). As of September 30, 2019, all current derivative activity is immaterial. At September 30, 2019 and December 31, 2018, cash deposits of $1.0 million related to commodity derivative contracts were reported in Prepaid expenses and other current assets in the Consolidated Balance Sheets, respectively. These cash deposits have not been used to increase the reported net assets or reduce the reported net liabilities on the derivative contracts at September 30, 2019 or December 31, 2018, respectively.

Earnings Per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted average of common shares outstanding during the period. Diluted earnings per common share adjusts basic earnings per common share for the effects of stock options and restricted stock in the periods where such items are dilutive.

On July 24, 2019, the Board of Directors approved an up to $400 million share repurchase program to be executed over the two-year period ending July 2021. Purchases may be effected in the open market, through privately negotiated transactions, through one or more accelerated stock repurchase programs, through a combination of the foregoing or in any other manner in the discretion of management. Purchases will be made subject to available cash, market conditions and compliance with our financing arrangements at any time during the period of authorization. We may use cash from operations as well as draws under our credit facilities to effect purchases.

Prior to the July authorization, the Company had continued to conduct share repurchases under quarterly allocations in line with its past practice, subject to market conditions and cash availability. For the nine months ended September 30, 2019, the Company acquired 1,597,731 shares of common stock for an average price of $87.09 per share including brokerage fees and for the nine months ended September 30, 2018, 1,994,632 shares were repurchased for an average price of $72.39 per share.

The following table provides a reconciliation of basic and diluted earnings per share computations for the three and nine months ended September 30, 2019 and 2018:



	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of dollars, except share and per share amounts)	2019		2018		2019		2018
Earnings per common share:
Net income per share - basic
Net income attributable to common stockholders	$	69.2	$	45.0	$	107.2	$	136.1

Weighted average common shares outstanding (in thousands)	31,447		32,213		31,961		32,815

Earnings per common share	$	2.20	$	1.40	$	3.35	$	4.15



	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of dollars, except share and per share amounts)	2019		2018		2019		2018
Earnings per common share - assuming dilution:
Net income per share - diluted
Net income attributable to common stockholders	$	69.2	$	45.0	$	107.2	$	136.1

Weighted average common shares outstanding (in thousands)	31,447		32,213		31,961		32,815
Common equivalent shares:
Dilutive share-based awards	257		323		228		327
Weighted average common shares outstanding - assuming dilution (in thousands)	31,704		32,536		32,189		33,142

Earnings per common share assuming dilution	$	2.18	$	1.38	$	3.33	$	4.11

We have excluded from the earnings-per-share calculation certain stock options and shares that are considered to be anti-dilutive under the treasury stock method. For the reported periods, the number of time-based restricted stock units, performance based units and non-qualified stock options that are excluded due to their anti-dilutive nature is immaterial.

Other Financial Information

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Other Financial Information

CASH FLOW DISCLOSURES — Cash income taxes paid (collected), net of refunds, were $16.2 million and $12.0 million for the nine month periods ended September 30, 2019 and 2018, respectively. Interest paid, net of amounts capitalized, was $46.0 million and $41.0 million for the nine month periods ended September 30, 2019 and 2018, respectively.

CHANGES IN WORKING CAPITAL:



	Nine Months Ended September 30,
(Millions of dollars)	2019			2018
Accounts receivable	$	(25.4	)	$	(6.0	)
Inventories	(12.3		)	(32.6		)
Prepaid expenses and other current assets	6.8			17.1
Accounts payable and accrued liabilities	27.2			5.7
Net (increase) decrease in noncash operating working capital	$	(3.7	)	$	(15.8	)

Assets and Liabilities Measured at Fair Value

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Assets and Liabilities Measure at Fair Value

Assets and Liabilities Measured at Fair Value

The Company carries certain assets and liabilities at fair value in its Consolidated Balance Sheets. The fair value hierarchy is based on the quality of inputs used to measure fair value, with Level 1 being the highest quality and Level 3 being the lowest quality. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1. Level 3 inputs are unobservable inputs which reflect assumptions about pricing by market participants.

At the balance sheet date, the fair value of derivative contracts was determined using NYMEX quoted values but was immaterial.

The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at September 30, 2019 and December 31, 2018. The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table excludes Cash and cash equivalents, Accounts receivable-trade, Restricted cash, and Trade accounts payable and accrued liabilities, all of which had fair values approximating carrying amounts. The fair value of Current and Long-term debt was estimated based on rates offered to the Company at that time for debt of the same maturities. The Company has off-balance sheet exposures relating to certain financial guarantees and letters of credit. The fair value of these, which represents fees associated with obtaining the instruments, was nominal.



	At September 30, 2019						At December 31, 2018
	Carrying						Carrying
(Millions of dollars)	Amount			Fair Value			Amount			Fair Value
Financial liabilities
Current and long-term debt	$	(987.7	)	$	(1,011.6	)	$	(863.3	)	$	(866.7	)

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.

Revenue from Contract with Customer [Abstract]

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies The Company’s operations and earnings have been and may be affected by various forms of governmental action. Examples of such governmental action include, but are by no means limited to: tax increases and retroactive tax claims; import and export controls; price controls; allocation of supplies of crude oil and petroleum products and other goods; laws and regulations intended for the promotion of safety and the protection and/or remediation of the environment; governmental support for other forms of energy; and laws and regulations affecting the Company’s relationships with employees, suppliers, customers, stockholders and others. Because governmental actions are often motivated by political considerations, may be taken without full consideration of their consequences, and may be taken in response to actions of other governments, it is not practical to attempt to predict the likelihood of such actions, the form the actions may take or the effect such actions may have on the Company. ENVIRONMENTAL MATTERS AND LEGAL MATTERS — Murphy USA is subject to numerous federal, state and local laws and regulations dealing with the environment. Violation of such environmental laws, regulations and permits can result in the imposition of significant civil and criminal penalties, injunctions and other sanctions. A discharge of hazardous substances into the environment could, to the extent such event is not insured, subject the Company to substantial expense, including both the cost to comply with applicable regulations and claims by neighboring landowners and other third parties for any personal injury, property damage and other losses that might result. The Company currently owns or leases, and has in the past owned or leased, properties at which hazardous substances have been or are being handled. Although the Company believes it has used operating and disposal practices that were standard in the industry at the time, hazardous substances may have been disposed of or released on or under the properties owned or leased by the Company or on or under other locations where they have been taken for disposal. In addition, many of these properties have been operated by third parties whose management of hazardous substances was not under the Company’s control. Under existing laws the Company could be required to remediate contaminated property (including contaminated groundwater) or to perform remedial actions to prevent future contamination. Certain of these contaminated properties are in various stages of negotiation, investigation, and/or cleanup, and the Company is investigating the extent of any related liability and the availability of applicable defenses. With the sale of the U.S. refineries in 2011, Murphy Oil retained certain liabilities related to environmental matters. Murphy Oil also obtained insurance covering certain levels of environmental exposures. The Company believes costs related to these sites will not have a material adverse effect on Murphy USA’s net income, financial condition or liquidity in a future period. Certain environmental expenditures are likely to be recovered by the Company from other sources, primarily environmental funds maintained by certain states. Since no assurance can be given that future recoveries from other sources will occur, the Company has not recorded a benefit for likely recoveries at September 30, 2019, however certain jurisdictions provide reimbursement for these expenses which have been considered in recording the net exposure. The U.S. Environmental Protection Agency (EPA) currently considers the Company a Potentially Responsible Party (PRP) at one Superfund site. The potential total cost to all parties to perform necessary remedial work at this site may be substantial. However, based on current negotiations and available information, the Company believes that it is a de minimis party as to ultimate responsibility at the Superfund site. Accordingly, the Company has not recorded a liability for remedial costs at the Superfund site at September 30, 2019. The Company could be required to bear a pro rata share of costs attributable to nonparticipating PRPs or could be assigned additional responsibility for remediation at this site or other Superfund sites. The Company believes that its share of the ultimate costs to clean-up this site will be immaterial and will not have a material adverse effect on its net income, financial condition or liquidity in a future period. Based on information currently available to the Company, the amount of future remediation costs to be incurred to address known contamination sites is not expected to have a material adverse effect on the Company’s future net income, cash flows or liquidity. However, there is the possibility that additional environmental expenditures could be required to address contamination, including as a result of discovering additional contamination or the imposition of new or revised requirements applicable to known contamination. Other than as noted above, Murphy USA is engaged in a number of other legal proceedings, all of which the Company considers routine and incidental to its business. Based on information currently available to the Company, the ultimate resolution of those other legal matters is not expected to have a material adverse effect on the Company’s net income, financial condition or liquidity in a future period. INSURANCE — The Company maintains insurance coverage at levels that are customary and consistent with industry standards for companies of similar size. Murphy USA maintains statutory workers compensation insurance with a deductible of $1.0 million per occurrence, general liability insurance with a self-insured retention of $3.0 million per occurrence, and auto liability insurance with a deductible of $0.3 million per occurrence. As of September 30, 2019, there were a number of outstanding claims that are of a routine nature. The estimated incurred but unpaid liabilities relating to these claims are included in Trade account payables and accrued liabilities on the Consolidated Balance Sheets. While the ultimate outcome of these claims cannot presently be determined, management believes that the accrued liability of $21.3 million will be sufficient to cover the related liability for all insurance claims and that the ultimate disposition of these claims will have no material effect on the Company’s financial position and results of operations. The Company has obtained insurance coverage as appropriate for the business in which it is engaged, but may incur losses that are not covered by insurance or reserves, in whole or in part, and such losses could adversely affect our results of operations and financial position. TAX MATTERS — Murphy USA is subject to extensive tax liabilities imposed by multiple jurisdictions, including income taxes, indirect taxes (excise/duty, sales/use and gross receipts taxes), payroll taxes, franchise taxes, withholding taxes and ad valorem taxes. New tax laws and regulations and changes in existing tax laws and regulations are continuously being enacted or proposed that could result in increased expenditures for tax liabilities in the future. Many of these liabilities are subject to periodic audits by the respective taxing authority. Subsequent changes to our tax liabilities because of these audits may subject us to interest and penalties. OTHER MATTERS — In the normal course of its business, the Company is required under certain contracts with various governmental authorities and others to provide financial guarantees or letters of credit that may be drawn upon if the Company fails to perform under those contracts. At September 30, 2019, the Company had contingent liabilities of $17.0 million on outstanding letters of credit. The Company has not accrued a liability in its balance sheet related to these financial guarantees and letters of credit because it is believed that the likelihood of having these drawn is remote.

Lease Accounting

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lease Accounting

The Company determines if an arrangement is a lease or contains a lease at inception. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. The Company's leases have remaining lease terms of approximately 1 year to 20 years, which may include the option to extend the lease when it is reasonably certain the Company will exercise the option. Most leases include one or more options to renew, with renewal terms that can extend the lease term from five to 20 years or more. The exercise of lease renewal options is at the Company's sole discretion. Due to the uncertainties of future markets, economic factors, technology changes, demographic shifts and behavior, environmental regulatory requirements and other information that impacts decisions as to station location, management has determined that it was not reasonably certain to exercise contract options and they are not included in the lease term. Additionally, short-term leases and leases with variable lease costs are immaterial. The Company reviews all options to extend, terminate, or otherwise modify its lease agreements to determine if changes are required to the right of use assets and liabilities.

As the implicit interest rate is not readily determinable in most of the Company's lease agreements, the Company uses its estimated secured incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments.

Lessor — We have various arrangements for certain spaces for food service and vending equipment under which we are the lessor. These leases meet the criteria for operating lease classification. Lease income associated with these leases is immaterial.

Lessee —We lease land for 216 stations, one terminal, a hangar and various equipment. Our lease agreements do not contain any material residual value guarantees and approximately 102 sites leased from Walmart contain restrictive covenants, though the restrictions are deemed to have an immaterial impact.

Leases are reflected in the following balance sheet accounts:



(Millions of dollars)	Classification	September 30, 2019
Assets
Operating (Right-of-use)	Other Assets	$	118.1
Finance	Property, plant, and equipment, at cost, less accumulated depreciation of $2.2 million	3.1
Total leased assets		$	121.2

Liabilities
Current
Operating	Trade accounts payable and accrued liabilities	$	6.5
Finance	Current maturities of long-term debt	1.3
Noncurrent
Operating	Deferred credits and other liabilities	112.5
Finance	Long-term debt, including capitalized lease obligations	1.2
Total lease liabilities		$	121.5

Lease Cost:



		Three Months Ended September 30,		Nine Months Ended September 30,
(Millions of dollars)	Classification	2019		2019
Operating lease cost	Station and other operating expenses	$	3.7	$	10.8
Finance lease cost
Amortization of leased assets	Depreciation & amortization expense	0.3		0.9
Interest on lease liabilities	Interest expense	—		0.1
Net lease costs		$	4.0	$	11.8

Cash flow information:



	Nine Months Ended September 30,
(Millions of dollars)	2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$	10.2
Operating cash flows from finance leases	$	0.1
Financing cash flows from finance leases	$	1.1

Maturity of Lease Liabilities:



(Millions of dollars)	Operating leases		Finance leases
2019	$	7.1	$	0.8
2020	14.3		1.3
2021	13.5		0.8
2022	12.7		0.2
2023	12.1		—
After 2023	146.4		—
Total lease payments	206.1		3.1
less: interest	87.1		0.5
Present value of lease liabilities	$	119.0	$	2.6

The Company adopted ASU 2016-02 on January 1, 2019, and as required, the following disclosure is provided for periods prior to adoption. Future annual minimum lease payments and capital lease commitments as of December 31, 2018 were as follows:



(Millions of dollars)	Operating leases		Capital leases
2019	$	13.7	$	1.5
2020	13.3		1.1
2021	12.5		0.6
2022	11.7		0.1
2023	11.1		—
After 2023	122.6		—
Total lease payments	184.9		3.3
less: interest	—		0.2
Present value of minimum payments	$	184.9	$	3.1

Lease Term and Discount Rate:



	Nine Months Ended September 30,
	2019
Weighted average remaining lease term (years)
Finance leases	2.1
Operating leases	15.5
Weighted average discount rate
Finance leases	4.9	%
Operating leases	6.1	%

Lease Accounting

The Company determines if an arrangement is a lease or contains a lease at inception. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. The Company's leases have remaining lease terms of approximately 1 year to 20 years, which may include the option to extend the lease when it is reasonably certain the Company will exercise the option. Most leases include one or more options to renew, with renewal terms that can extend the lease term from five to 20 years or more. The exercise of lease renewal options is at the Company's sole discretion. Due to the uncertainties of future markets, economic factors, technology changes, demographic shifts and behavior, environmental regulatory requirements and other information that impacts decisions as to station location, management has determined that it was not reasonably certain to exercise contract options and they are not included in the lease term. Additionally, short-term leases and leases with variable lease costs are immaterial. The Company reviews all options to extend, terminate, or otherwise modify its lease agreements to determine if changes are required to the right of use assets and liabilities.

As the implicit interest rate is not readily determinable in most of the Company's lease agreements, the Company uses its estimated secured incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments.

Lessor — We have various arrangements for certain spaces for food service and vending equipment under which we are the lessor. These leases meet the criteria for operating lease classification. Lease income associated with these leases is immaterial.

Lessee —We lease land for 216 stations, one terminal, a hangar and various equipment. Our lease agreements do not contain any material residual value guarantees and approximately 102 sites leased from Walmart contain restrictive covenants, though the restrictions are deemed to have an immaterial impact.

Leases are reflected in the following balance sheet accounts:



(Millions of dollars)	Classification	September 30, 2019
Assets
Operating (Right-of-use)	Other Assets	$	118.1
Finance	Property, plant, and equipment, at cost, less accumulated depreciation of $2.2 million	3.1
Total leased assets		$	121.2

Liabilities
Current
Operating	Trade accounts payable and accrued liabilities	$	6.5
Finance	Current maturities of long-term debt	1.3
Noncurrent
Operating	Deferred credits and other liabilities	112.5
Finance	Long-term debt, including capitalized lease obligations	1.2
Total lease liabilities		$	121.5

Lease Cost:



		Three Months Ended September 30,		Nine Months Ended September 30,
(Millions of dollars)	Classification	2019		2019
Operating lease cost	Station and other operating expenses	$	3.7	$	10.8
Finance lease cost
Amortization of leased assets	Depreciation & amortization expense	0.3		0.9
Interest on lease liabilities	Interest expense	—		0.1
Net lease costs		$	4.0	$	11.8

Cash flow information:



	Nine Months Ended September 30,
(Millions of dollars)	2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$	10.2
Operating cash flows from finance leases	$	0.1
Financing cash flows from finance leases	$	1.1

Maturity of Lease Liabilities:



(Millions of dollars)	Operating leases		Finance leases
2019	$	7.1	$	0.8
2020	14.3		1.3
2021	13.5		0.8
2022	12.7		0.2
2023	12.1		—
After 2023	146.4		—
Total lease payments	206.1		3.1
less: interest	87.1		0.5
Present value of lease liabilities	$	119.0	$	2.6

The Company adopted ASU 2016-02 on January 1, 2019, and as required, the following disclosure is provided for periods prior to adoption. Future annual minimum lease payments and capital lease commitments as of December 31, 2018 were as follows:



(Millions of dollars)	Operating leases		Capital leases
2019	$	13.7	$	1.5
2020	13.3		1.1
2021	12.5		0.6
2022	11.7		0.1
2023	11.1		—
After 2023	122.6		—
Total lease payments	184.9		3.3
less: interest	—		0.2
Present value of minimum payments	$	184.9	$	3.1

Lease Term and Discount Rate:



	Nine Months Ended September 30,
	2019
Weighted average remaining lease term (years)
Finance leases	2.1
Operating leases	15.5
Weighted average discount rate
Finance leases	4.9	%
Operating leases	6.1	%

Business Segment

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Business Segment

The Company's operations have one reportable segment which is Marketing. The operations include the sale of retail motor fuel products and convenience merchandise along with the wholesale and bulk sale capabilities of our Product Supply and Wholesale ("PS&W") group. As the primary purpose of the PS&W group is to support our retail operations and provide fuel for their daily operation, the bulk and wholesale fuel sales are secondary to the support functions performed by these groups. As such, they are all treated as one segment for reporting purposes as they sell the same products. This Marketing segment contains essentially all of the revenue generating functions of the Company. Results not included in the reportable segment include Corporate and Other Assets. Net settlement proceeds from litigation are included in Corporate and other assets operating income. The reportable segment was determined based on information reviewed by the Chief Operating Decision Maker (CODM).



			Three Months Ended
			September 30, 2019					September 30, 2018
	Total Assets at		External		Income			External		Income
(Millions of dollars)	September 30, 2019		Revenues		(Loss)			Revenues		(Loss)
Marketing	$	2,199.7	$	3,657.6	$	94.0		$	3,788.0	$	54.6
Corporate and other assets	417.0		—		(24.8		)	—		(9.6		)
Total	$	2,616.7	$	3,657.6	$	69.2		$	3,788.0	$	45.0



	Nine Months Ended
	September 30, 2019					September 30, 2018
	External		Income			External		Income
(Millions of dollars)	Revenues		(Loss)			Revenues		(Loss)
Marketing	$	10,574.3	$	154.7		$	10,860.7	$	126.1
Corporate and other assets	0.1		(47.5		)	0.5		10.0
Total	$	10,574.4	$	107.2		$	10,861.2	$	136.1

Guarantor Subsidiaries

9 Months Ended

Sep. 30, 2019

Guarantor Subsidiaries [Abstract]

Guarantor Subsidiaries

Murphy USA Inc. ("Parent Company") and certain of the Company’s 100% owned, domestic subsidiaries (the “Guarantor Subsidiaries”) fully and unconditionally guarantee, on a joint and several basis, certain of the outstanding indebtedness of Murphy Oil USA, Inc. (the "Issuer"), including the 4.75% senior notes due 2029 and the 5.625% senior notes due 2027. The following consolidating schedules present financial information on a consolidated basis in conformity with the SEC’s Regulation S-X Rule 3-10(d):

CONSOLIDATING BALANCE SHEET



(Millions of dollars, except share amounts)	September 30, 2019
Assets	Parent Company			Issuer		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Current assets
Cash and cash equivalents	$	—		$	246.9	$	0.8		$	—		$	—		$	247.7
Accounts receivable—trade, less allowance for doubtful accounts of $1.2 in 2019	—			164.4		(0.1		)	—			—			164.3
Inventories, at lower of cost or market	—			233.8		—			—			—			233.8
Prepaid expenses and other current assets	—			18.9		0.2			—			—			19.1
Total current assets	—			664.0		0.9			—			—			664.9
Property, plant and equipment, at cost less accumulated depreciation and amortization of $1,074.8 in 2019	—			1,782.6		6.7			—			—			1,789.3
Investments in subsidiaries	2,544.2			144.0		—			—			(2,688.2		)	—
Other assets	—			162.5		—			—			—			162.5
Total assets	$	2,544.2		$	2,753.1	$	7.6		$	—		$	(2,688.2	)	$	2,616.7
Liabilities and Stockholders' Equity
Current liabilities
Current maturities of long-term debt	$	—		$	21.3	$	—		$	—		$	—		$	21.3
Inter-company accounts payable	139.0			58.9		(43.6		)	(154.3		)	—			—
Trade accounts payable and accrued liabilities	—			495.6		—			—			—			495.6
Total current liabilities	139.0			575.8		(43.6		)	(154.3		)	—			516.9
Long-term debt, including capitalized lease obligations	—			966.4		—			—			—			966.4
Deferred income taxes	—			199.0		—			—			—			199.0
Asset retirement obligations	—			32.3		—			—			—			32.3
Deferred credits and other liabilities	—			123.1		—			—			—			123.1
Total liabilities	139.0			1,896.6		(43.6		)	(154.3		)	—			1,837.7
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)	—			—		—			—			—			—
Common Stock, par 0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at September 30, 2019)	0.5			—		0.1			—			(0.1		)	0.5
Treasury Stock (16,007,513 shares held at September 30, 2019)	(1,073.2		)	—		—			—			—			(1,073.2		)
Additional paid in capital (APIC)	1,188.9			576.4		52.0			87.5			(1,368.4		)	536.4
Retained earnings	2,289.0			280.1		(0.9		)	66.8			(1,319.7		)	1,315.3
Total stockholders' equity	2,405.2			856.5		51.2			154.3			(2,688.2		)	779.0
Total liabilities and stockholders' equity	$	2,544.2		$	2,753.1	$	7.6		$	—		$	(2,688.2	)	$	2,616.7

CONSOLIDATING BALANCE SHEET



(Millions of dollars, except share amounts)	December 31, 2018
Assets	Parent Company			Issuer		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Current assets
Cash and cash equivalents	$	—		$	184.0	$	0.5		$	—		$	—		$	184.5
Accounts receivable—trade, less allowance for doubtful accounts of $1.1 in 2018	—			138.8		—			—			—			138.8
Inventories, at lower of cost or market	—			221.5		—			—			—			221.5
Prepaid expenses and other current assets	—			25.1		0.2			—			—			25.3
Total current assets	—			569.4		0.7			—			—			570.1
Property, plant and equipment, at cost less accumulated depreciation and amortization of $974.2 in 2018	—			1,745.9		2.3			—			—			1,748.2
Investments in subsidiaries	2,437.0			144.4		—			—			(2,581.4		)	—
Other assets	—			42.5		—			—			—			42.5
Total assets	$	2,437.0		$	2,502.2	$	3.0		$	—		$	(2,581.4	)	$	2,360.8
Liabilities and Stockholders' Equity
Current liabilities
Current maturities of long-term debt	$	—		$	21.2	$	—		$	—		$	—		$	21.2
Inter-company accounts payable	(0.1		)	203.0		(48.6		)	(154.3		)	—			—
Trade accounts payable and accrued liabilities	—			456.9		—			—			—			456.9
Total current liabilities	(0.1		)	681.1		(48.6		)	(154.3		)	—			478.1
Long-term debt, including capitalized lease obligations	—			842.1		—			—			—			842.1
Deferred income taxes	—			192.2		—			—			—			192.2
Asset retirement obligations	—			30.7		—			—			—			30.7
Deferred credits and other liabilities	—			10.4		—			—			—			10.4
Total liabilities	(0.1		)	1,756.5		(48.6		)	(154.3		)	—			1,553.5
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)	—			—		—			—			—			—
Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at December 31, 2018)	0.5			—		0.1			—			(0.1		)	0.5
Treasury Stock (14,505,681 shares held at December 31, 2018)	(940.3		)	—		—			—			—			(940.3		)
Additional paid in capital (APIC)	1,195.1			572.8		52.0			87.5			(1,368.4		)	539.0
Retained earnings	2,181.8			172.9		(0.5		)	66.8			(1,212.9		)	1,208.1
Total stockholders' equity	2,437.1			745.7		51.6			154.3			(2,581.4		)	807.3
Total liabilities and stockholders' equity	$	2,437.0		$	2,502.2	$	3.0		$	—		$	(2,581.4	)	$	2,360.8

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Three Months Ended September 30, 2019
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	2,965.5		$	—		$	—	$	—		$	2,965.5
Merchandise sales	—		681.1			—			—		—			681.1
Other operating revenues	—		11.0			—			—		—			11.0
Total operating revenues	—		3,657.6			—			—		—			3,657.6

Operating Expenses
Petroleum product cost of goods sold	—		2,749.6			—			—		—			2,749.6
Merchandise cost of goods sold	—		569.9			—			—		—			569.9
Station and other operating expenses	—		143.4			—			—		—			143.4
Depreciation and amortization	—		37.6			—			—		—			37.6
Selling, general and administrative	—		36.0			—			—		—			36.0
Accretion of asset retirement obligations	—		0.6			—			—		—			0.6
Total operating expenses	—		3,537.1			—			—		—			3,537.1

Net settlement proceeds	—		—			—			—		—			—
Gain (loss) on sale of assets	—		0.2			—			—		—			0.2
Income (loss) from operations	—		120.7			—			—		—			120.7

Other income (expense)
Interest income	—		0.8			—			—		—			0.8
Interest expense	—		(15.3		)	—			—		—			(15.3		)
Loss on early debt extinguishment	—		(14.8		)	—			—		—			(14.8		)
Other nonoperating income	—		—			(0.1		)	—		—			(0.1		)
Total other income (expense)	—		(29.3		)	(0.1		)	—		—			(29.4		)
Income (loss) before income taxes	—		91.4			(0.1		)	—		—			91.3
Income tax expense	—		22.1			—			—		—			22.1
Income (loss)	—		69.3			(0.1		)	—		—			69.2
Equity earnings in affiliates, net of tax	69.2		(0.1		)	—			—		(69.1		)	—
Net Income (Loss)	$	69.2	$	69.2		$	(0.1	)	$	—	$	(69.1	)	$	69.2

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Three Months Ended September 30, 2018
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	3,151.5		$	—	$	—	$	—		$	3,151.5
Merchandise sales	—		623.7			—		—		—			623.7
Other operating revenues	—		12.8			—		—		—			12.8
Total operating revenues	—		3,788.0			—		—		—			3,788.0

Operating Expenses
Petroleum product cost of goods sold	—		2,991.3			—		—		—			2,991.3
Merchandise cost of goods sold	—		519.2			—		—		—			519.2
Station and other operating expenses	—		139.7			—		—		—			139.7
Depreciation and amortization	—		34.2			—		—		—			34.2
Selling, general and administrative	—		32.6			—		—		—			32.6
Accretion of asset retirement obligations	—		0.5			—		—		—			0.5
Total operating expenses	—		3,717.5			—		—		—			3,717.5

Net settlement proceeds	—		—			—		—		—			—
Gain (loss) on sale of assets	—		(0.5		)	—		—		—			(0.5		)
Income (loss) from operations	—		70.0			—		—		—			70.0

Other income (expense)
Interest income	—		0.2			—		—		—			0.2
Interest expense	—		(13.2		)	—		—		—			(13.2		)
Other nonoperating income	—		—			—		—		—			—
Total other income (expense)	—		(13.0		)	—		—		—			(13.0		)
Income (loss) before income taxes	—		57.0			—		—		—			57.0
Income tax expense	—		12.0			—		—		—			12.0
Income (loss)	—		45.0			—		—		—			45.0
Equity earnings in affiliates, net of tax	45.0		—			—		—		(45.0		)	—
Net Income (Loss)	$	45.0	$	45.0		$	—	$	—	$	(45.0	)	$	45.0

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Nine Months Ended September 30, 2019
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	8,595.0		$	—		$	—	$	—		$	8,595.0
Merchandise sales	—		1,946.1			—			—		—			1,946.1
Other operating revenues	—		33.3			—			—		—			33.3
Total operating revenues	—		10,574.4			—			—		—			10,574.4

Operating Expenses
Petroleum product cost of goods sold	—		8,104.8			—			—		—			8,104.8
Merchandise cost of goods sold	—		1,631.9			—			—		—			1,631.9
Station and other operating expenses	—		421.8			—			—		—			421.8
Depreciation and amortization	—		113.8			—			—		—			113.8
Selling, general and administrative	—		105.7			—			—		—			105.7
Accretion of asset retirement obligations	—		1.6			—			—		—			1.6
Total operating expenses	—		10,379.6			—			—		—			10,379.6

Net settlement proceeds	—		0.1			—			—		—			0.1
Gain (loss) on sale of assets	—		0.1			—			—		—			0.1
Income (loss) from operations	—		195.0			—			—		—			195.0

Other income (expense)
Interest income	—		2.4			—			—		—			2.4
Interest expense	—		(42.1		)	—			—		—			(42.1		)
Loss on early debt extinguishment	—		(14.8		)	—			—		—			(14.8		)
Other nonoperating income	—		0.5			(0.5		)	—		—			—
Total other income (expense)	—		(54.0		)	(0.5		)	—		—			(54.5		)
Income (loss) before income taxes	—		141.0			(0.5		)	—		—			140.5
Income tax expense	—		33.4			(0.1		)	—		—			33.3
Income (loss)	—		107.6			(0.4		)	—		—			107.2
Equity earnings in affiliates, net of tax	107.2		(0.4		)	—			—		(106.8		)	—
Net Income (Loss)	$	107.2	$	107.2		$	(0.4	)	$	—	$	(106.8	)	$	107.2

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Nine Months Ended September 30, 2018
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	8,982.8		$	—		$	—	$	—		$	8,982.8
Merchandise sales	—		1,807.5			—			—		—			1,807.5
Other operating revenues	—		70.9			—			—		—			70.9
Total operating revenues	—		10,861.2			—			—		—			10,861.2

Operating Expenses
Petroleum product cost of goods sold	—		8,584.9			—			—		—			8,584.9
Merchandise cost of goods sold	—		1,509.2			—			—		—			1,509.2
Station and other operating expenses	—		401.9			—			—		—			401.9
Depreciation and amortization	—		99.0			—			—		—			99.0
Selling, general and administrative	—		102.3			—			—		—			102.3
Accretion of asset retirement obligations	—		1.5			—			—		—			1.5
Total operating expenses	—		10,698.8			—			—		—			10,698.8

Net settlement proceeds	—		50.4			—			—		—			50.4
Gain (loss) on sale of assets	—		(0.7		)	—			—		—			(0.7		)
Income (loss) from operations	—		212.1			—			—		—			212.1

Other income (expense)
Interest income	—		0.8			—			—		—			0.8
Interest expense	—		(39.6		)	—			—		—			(39.6		)
Other nonoperating income	—		0.2			(0.1		)	—		—			0.1
Total other income (expense)	—		(38.6		)	(0.1		)	—		—			(38.7		)
Income (loss) before income taxes	—		173.5			(0.1		)	—		—			173.4
Income tax expense	—		37.3			—			—		—			37.3
Income (loss)	—		136.2			(0.1		)	—		—			136.1
Equity earnings in affiliates, net of tax	136.1		(0.1		)	—			—		(136.0		)	—
Net Income (Loss)	$	136.1	$	136.1		$	(0.1	)	$	—	$	(136.0	)	$	136.1

CONSOLIDATING STATEMENT OF CASH FLOW



(Millions of dollars)	Nine Months Ended September 30, 2019
Operating Activities	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	107.2		$	107.2		$	(0.4	)	$	—	$	(106.8	)	$	107.2
Adjustments to reconcile net income (loss) to net cash provided by (required by) operating activities
Depreciation and amortization	—			113.8			—			—		—			113.8
Deferred and noncurrent income tax charges (credits)	—			6.9			—			—		—			6.9
Accretion of asset retirement obligations	—			1.6			—			—		—			1.6
(Gain) loss on sale of assets	—			(0.1		)	—			—		—			(0.1		)
Net (increase) decrease in noncash operating working capital	—			(3.6		)	(0.1		)	—		—			(3.7		)
Equity in earnings of affiliates	(107.2		)	0.4			—			—		106.8			—
Loss on early debt extinguishment	—			14.8			—			—		—			14.8
Other operating activities - net	—			11.1			—			—		—			11.1
Net cash provided by (required by) operating activities	—			252.1			(0.5		)	—		—			251.6
Investing Activities
Property additions	—			(149.3		)	(4.4		)	—		—			(153.7		)
Proceeds from sale of assets	—			2.4			—			—		—			2.4
Other investing activities - net	—			(0.7		)	—			—		—			(0.7		)
Net cash provided by (required by) investing activities	—			(147.6		)	(4.4		)	—		—			(152.0		)
Financing Activities
Purchase of treasury stock	(139.1		)	—			—			—		—			(139.1		)
Borrowings of debt	—			693.7			—			—		—			693.7
Repayments of debt	—			(573.1		)	—			—		—			(573.1		)
Debt issuance costs	—			(3.1		)	—			—		—			(3.1		)
Early debt extinguishment costs	—			(10.4		)	—			—		—			(10.4		)
Amounts related to share-based compensation	—			(4.4		)	—			—		—			(4.4		)
Net distributions to parent	139.1			(144.3		)	5.2			—		—			—
Net cash provided by (required by) financing activities	—			(41.6		)	5.2			—		—			(36.4		)
Net increase (decrease) in cash and cash equivalents	—			62.9			0.3			—		—			63.2
Cash, cash equivalents, and restricted cash at January 1	—			184.0			0.5			—		—			184.5
Cash, cash equivalents, and restricted cash at September 30	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7

Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents at beginning of period	$	—		$	184.0		$	0.5		$	—	$	—		$	184.5
Restricted cash at beginning of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at beginning of period	$	—		$	184.0		$	0.5		$	—	$	—		$	184.5

Cash and cash equivalents at end of period	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7
Restricted cash at end of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at end of period	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7

CONSOLIDATING STATEMENT OF CASH FLOW



(Millions of dollars)	Nine Months Ended September 30, 2018
Operating Activities	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	136.1		$	136.1		$	(0.1	)	$	—	$	(136.0	)	$	136.1
Adjustments to reconcile net income (loss) to net cash provided by (required by)operating activities
Depreciation and amortization	—			99.0			—			—		—			99.0
Deferred and noncurrent income tax charges (credits)	—			13.9			—			—		—			13.9
Accretion of asset retirement obligations	—			1.5			—			—		—			1.5
Pretax (gains) losses from sale of assets	—			0.7			—			—		—			0.7
Net (increase) decrease in noncash operating working capital	—			(15.8		)	—			—		—			(15.8		)
Equity in earnings of affiliates	(136.1		)	0.1			—			—		136.0			—
Other operating activities - net	—			6.0			—			—		—			6.0
Net cash provided by (required by) operating activities	—			241.5			(0.1		)	—		—			241.4
Investing Activities
Property additions	—			(162.2		)	(0.8		)	—		—			(163.0		)
Proceeds from sale of assets	—			1.2			—			—		—			1.2
Other investing activities - net	—			(5.9		)	—			—		—			(5.9		)
Net cash provided by (required by) investing activities	—			(166.9		)	(0.8		)	—		—			(167.7		)
Financing Activities
Purchase of treasury stock	(144.4		)	—			—			—		—			(144.4		)
Repayments of debt	—			(15.9		)	—			—		—			(15.9		)
Amounts related to share-based compensation	—			(8.0		)	—			—		—			(8.0		)
Net distributions to parent	144.4			(145.9		)	1.5			—		—			—
Net cash provided by (required) by financing activities	—			(169.8		)	1.5			—		—			(168.3		)
Net increase (decrease) in cash and cash equivalents	—			(95.2		)	0.6			—		—			(94.6		)
Cash, cash equivalents, and restricted cash at January 1	—			169.9			0.1			—		—			170.0
Cash, cash equivalents, and restricted cash at September 30	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4

Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents at beginning of period	$	—		$	169.9		$	0.1		$	—	$	—		$	170.0
Restricted cash at beginning of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at beginning of period	$	—		$	169.9		$	0.1		$	—	$	—		$	170.0

Cash and cash equivalents at end of period	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4
Restricted cash at end of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at end of period	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4

CONSOLIDATING STATEMENT OF CHANGES IN EQUITY



(Millions of dollars)	Nine Months Ended September 30, 2019
Statement of Stockholders' Equity	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Common Stock
Balance as of December 31, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of March 31, 2019	0.5			—			0.1			—		(0.1		)	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of June 30, 2019	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of September 30, 2019	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Treasury Stock
Balance as of December 31, 2018	$	(940.3	)	$	—		$	—		$	—	$	—		$	(940.3	)
Issuance of treasury stock	5.6			—			—			—		—			5.6
Repurchase of treasury stock	(13.3		)	—			—			—		—			(13.3		)
Balance as of March 31, 2019	$	(948.0	)	$	—		$	—		$	—	$	—		(948.0		)
Issuance of treasury stock	0.1			—			—			—		—			0.1
Repurchase of treasury stock	(16.8		)	—			—			—		—			(16.8		)
Balance as of June 30, 2019	$	(964.7	)	$	—		$	—		$	—	$	—		$	(964.7	)
Issuance of treasury stock	0.5			—			—			—		—			0.5
Repurchase of treasury stock	(109.0		)	—			—			—		—			(109.0		)
Balance as of September 30, 2019	$	(1,073.2	)	$	—		$	—		$	—	$	—		$	(1,073.2	)
APIC
Balance as of December 31, 2018	$	1,195.1		$	572.8		$	52.0		$	87.5	$	(1,368.4	)	$	539.0
Issuance of treasury stock	(5.6		)	—			—			—		—			(5.6		)
Amounts related to share-based compensation	—			(4.1		)	—			—		—			(4.1		)
Share-based compensation expense	—			2.6			—			—		—			2.6
Balance as of March 31, 2019	$	1,189.5		$	571.3		$	52.0		$	87.5	$	(1,368.4	)	531.9
Issuance of treasury stock	(0.1		)	$	—		$	—		$	—	$	—		(0.1		)
Amounts related to share-based compensation	—			(0.2		)	—			—		—			(0.2		)
Share-based compensation expense	—			2.8			—			—		—			2.8
Balance as of June 30, 2019	$	1,189.4		$	573.9		$	52.0		$	87.5	$	(1,368.4	)	$	534.4
Issuance of treasury stock	(0.5		)	$	—		$	—		$	—	$	—		(0.5		)
Amounts related to share-based compensation	—			(0.1		)	—			—		—			(0.1		)
Share-based compensation expense	—			2.6			—			—		—			2.6
Balance as of September 30, 2019	$	1,188.9		$	576.4		$	52.0		$	87.5	$	(1,368.4	)	$	536.4
Retained Earnings
Balance as of December 31, 2018	$	2,181.8		$	172.9		$	(0.5	)	$	66.8	$	(1,212.9	)	$	1,208.1
Net income (loss)	5.3			5.3			(0.2		)	—		(5.1		)	5.3
Balance as of March 31, 2019	$	2,187.1		$	178.2		$	(0.7	)	$	66.8	$	(1,218.0	)	1,213.4
Net income (loss)	32.7			32.7			$	(0.1	)	—		(32.6		)	32.7
Balance as of June 30, 2019	$	2,219.8		$	210.9		$	(0.8	)	$	66.8	$	(1,250.6	)	$	1,246.1
Net income (loss)	69.2			69.2			(0.1		)	—		(69.1		)	69.2
Balance as of September 30, 2019	$	2,289.0		$	280.1		$	(0.9	)	$	66.8	$	(1,319.7	)	$	1,315.3

CONSOLIDATING STATEMENT OF CHANGES IN EQUITY



(Millions of dollars)	Nine Months Ended September 30, 2018
Statement of Stockholders' Equity	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Common Stock
Balance as of December 31, 2017	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of March 31, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			$	—		—		—			—
Balance as of June 30, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of September 30, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Treasury Stock
Balance as of December 31, 2017	$	(806.5	)	$	—		$	—		$	—	$	—		$	(806.5	)
Issuance of treasury stock	4.4			—			—			—		—			4.4
Repurchase of treasury stock	(71.7		)	—			—			—		—			(71.7		)
Balance as of March 31, 2018	$	(873.8	)	$	—		$	—		$	—	$	—		(873.8		)
Issuance of treasury stock	0.6			$	—		$	—		$	—	$	—		0.6
Repurchase of treasury stock	(72.7		)	$	—		$	—		$	—	$	—		(72.7		)
Balance as of June 30, 2018	$	(945.9	)	$	—		$	—		$	—	$	—		$	(945.9	)
Issuance of treasury stock	4.3			—			—			—		—			4.3
Repurchase of treasury stock	—			—			—			—		—			—
Balance as of September 30, 2018	$	(941.6	)	$	—		$	—		$	—	$	—		$	(941.6	)
APIC
Balance as of December 31, 2017	$	1,205.7		$	573.1		$	52.0		$	87.5	$	(1,368.4	)	$	549.9
Issuance of treasury stock	(4.4		)	—			—			—		—			(4.4		)
Amounts related to share-based compensation	—			(2.9		)	—			—		—			(2.9		)
Share-based compensation expense	—			2.2			—			—		—			2.2
Balance as of March 31, 2018	$	1,201.3		$	572.4		$	52.0		$	87.5	$	(1,368.4	)	$	544.8
Issuance of treasury stock	(0.6		)	—			—			—		—			(0.6		)
Amounts related to share-based compensation	—			(0.5		)	—			—		—			(0.5		)
Share-based compensation expense	—			2.4			—			—		—			2.4
Balance as of June 30, 2018	$	1,200.7		$	574.3		$	52.0		$	87.5	$	(1,368.4	)	$	546.1
Issuance of treasury stock	(4.3		)												(4.3		)
Amounts related to share-based compensation	—			(4.6		)	—			—		—			(4.6		)
Share-based compensation expense	—			2.2			—			—		—			2.2
Balance as of September 30, 2018	$	1,196.4		$	571.9		$	52.0		$	87.5	$	(1,368.4	)	$	539.4
Retained Earnings
Balance as of December 31, 2017	$	994.5		$	933.0		$	—		$	66.8	$	(999.8	)	$	994.5
Net income (loss)	39.3			39.3			—			—		(39.3		)	39.3
Balance as of March 31, 2018	$	1,033.8		$	972.3		$	—		$	66.8	$	(1,039.1	)	1,033.8
Net income (loss)	51.8			51.8			(0.1		)	—		(51.7		)	51.8
Balance as of June 30, 2018	$	1,085.6		$	1,024.1		$	(0.1	)	$	66.8	$	(1,090.8	)	$	1,085.6
Net income (loss)	45.0			45.0			—			—		(45.0		)	45.0
Balance as of September 30, 2018	$	1,130.6		$	1,069.1		$	(0.1	)	$	66.8	$	(1,135.8	)	$	1,130.6

Description of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation — Murphy USA was incorporated in March 2013 and, in connection with its incorporation, Murphy USA issued 100 shares of common stock, par value $0.01 per share, to Murphy Oil Corporation (“Murphy Oil”) for $1.00. On August 30, 2013, Murphy USA was separated from Murphy Oil through the distribution of 100% of the common stock of Murphy USA to holders of Murphy Oil stock. In preparing the financial statements of Murphy USA in conformity with accounting principles generally accepted in the United States, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities. Actual results may differ from these estimates.
Recently Issued Accounting Standards	Recently Issued Accounting Standards— In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)" (“ASU 2016-02”). ASU 2016-02 amends the existing accounting standards for lease accounting by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under current GAAP. ASU 2016-02 requires that a lessee should recognize a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on the balance sheet. We adopted ASU 2016-02 as of January 1, 2019, using the modified retrospective approach. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. We also elected the practical expedient related to land easements, allowing us to carry forward our accounting treatment for land easements on existing agreements. In addition, we elected the hindsight practical expedient to determine the lease term for existing leases. Our election of the hindsight practical expedient resulted in the shortening of lease terms for certain existing leases and the useful lives of corresponding leasehold improvements. In our application of hindsight, we evaluated the performance of the leased stores and the associated markets in relation to our overall real estate strategies, which resulted in the determination that renewal options would not be reasonably certain in determining the expected lease term. Adoption of the new standard resulted in the recording of additional net lease assets and lease liabilities of approximately $110.4 million and $110.7 million, respectively. The standard did not materially impact our consolidated net earnings and had no impact on cash flows. See Note 13 "Lease Accounting" for further details. In August 2018, the FASB issued ASU 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract". This ASU aligns the accounting treatment for capitalizing implementation costs incurred by customers in cloud computing arrangements in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This guidance is effective for the Company on January 1, 2020. Early adoption is permitted. The amendments in this update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is currently assessing the effect that this ASU will have on our financial position, results of operations, and disclosures but does not expect this update to have a material impact on the Company's consolidated financial statements.
Revenue Recognition	Marketing segment Petroleum product sales (at retail). For our retail store locations, the revenue related to petroleum product sales is recognized as the fuel is pumped to our customers. The transaction price at the pump typically includes some portion of sales or excise taxes as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. Our customers typically use a mixture of cash, checks, credit cards and debit cards to pay for our products as they are received. We have accounts receivable from the various credit/debit card providers at any point in time related to product sales made on credit cards and debit cards. These receivables are typically collected in two to seven days, depending on the terms with the particular credit/debit card providers. Payment fees retained by the credit/debit card providers are recorded as station and other operating expenses. Petroleum product sales (at wholesale). Our sales of petroleum products at wholesale are generally recorded as revenue when the deliveries have occurred and legal ownership of the product has transferred to the customer. Title transfer for bulk refined product sales typically occurs at pipeline custody points and upon trucks loading at product terminals. For bulk pipeline sales, we record receivables from customers that are generally collected within a week from custody transfer date. For our rack product sales, the majority of our customers' accounts are drafted by us within 10 days from product transfer. Merchandise sales. For our retail store locations, the revenue related to merchandise sales is recognized as the customer completes their purchase at our locations. The transaction price typically includes some portion of sales tax as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. As noted above, a mixture of payment types are used for these revenues and the same terms for credit/debit card receivables are realized. The most significant judgment with respect to merchandise sales revenue is determining whether we are the principal or agent for some categories of merchandise such as lottery tickets, lotto tickets, newspapers and other small categories of merchandise. For scratch-off lottery tickets, we have determined we are the principal in the majority of the jurisdictions and therefore we record those sales on a gross basis. We have some categories of merchandise (such as lotto tickets) where we are the agent and the revenues recorded for those transactions are our net commission only. In June 2018, the Company initiated a loyalty pilot program through a limited number of its retail locations. The customers earn rewards based on their spending or other promotional activities. This program creates a performance obligation which requires us to defer a portion of sales revenue to the loyalty program participants until they redeem their rewards. The rewards may be redeemed for merchandise or cash discounts on fuel purchases. The program was rolled out chain-wide in March 2019. The deferred revenues recorded in the three and nine months ended September 30, 2019 were immaterial. RINs sales. For the sale of RINs, we recognize revenue when the RIN is transferred to the counter-party and the sale is completed. Receivables from our counter-parties related to the RIN sales are typically collected within five days of the sale. Other revenues. Items reported as other operating revenues include collection allowances for excise and sales tax and other miscellaneous items and are recognized as revenue when the transaction is completed. Revenue Recognition Revenue is recognized when obligations under the terms of a contract with our customers are satisfied; generally, this occurs with the transfer of control of our petroleum products, convenience merchandise, Renewable Identification Numbers ("RINs") and other assets to our third-party customers. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Excise and sales tax that we collect where we have determined we are the principal in the transaction have been recorded as revenue on a jurisdiction-by-jurisdiction basis. The Company enters into buy/sell and similar arrangements when petroleum products are held at one location but are needed at a different location. The Company often pays or receives funds related to the buy/sell arrangements based on location or quality differences. The Company continues to account for these transactions as non-monetary exchanges under existing accounting guidance and typically reports these on a net basis in the Consolidated Statements of Income.
Lease Accounting	Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term.

Revenues (Tables)

9 Months Ended

Sep. 30, 2019

Disaggregation of Revenue

The following tables disaggregates our revenue by major source for the three and nine months ended September 30, 2019 and 2018, respectively:



	Three Months Ended September 30, 2019						Three Months Ended September 30, 2018
(Millions of dollars)	Marketing		Corporate and Other Assets		Consolidated		Marketing		Corporate and Other Assets		Consolidated
Petroleum product sales (at retail) ¹	$	2,660.8	$	—	$	2,660.8	$	2,770.1	$	—	$	2,770.1
Petroleum product sales (at wholesale)	304.7		—		304.7		381.4		—		381.4
Total petroleum product sales	2,965.5		—		2,965.5		3,151.5		—		3,151.5
Merchandise sales	681.1		—		681.1		623.7		—		623.7
Other operating revenues:
RINs	8.6		—		8.6		11.6		—		11.6
Other revenues ²	2.4		—		2.4		1.2		—		1.2
Total revenues	$	3,657.6	$	—	$	3,657.6	$	3,788.0	$	—	$	3,788.0



	Nine Months Ended September 30, 2019						Nine Months Ended September 30, 2018
(Millions of dollars)	Marketing		Corporate and Other Assets		Consolidated		Marketing		Corporate and Other Assets		Consolidated
Petroleum product sales (at retail) ¹	$	7,717.7	$	—	$	7,717.7	$	7,910.6	$	—	$	7,910.6
Petroleum product sales (at wholesale)	877.3		—		877.3		1,072.2		—		1,072.2
Total petroleum product sales	8,595.0		—		8,595.0		8,982.8		—		8,982.8
Merchandise sales	1,946.1		—		1,946.1		1,807.5		—		1,807.5
Other operating revenues:
RINs	28.6		—		28.6		67.3		—		67.3
Other revenues ²	4.6		0.1		4.7		3.1		0.5		3.6
Total revenues	$	10,574.3	$	0.1	$	10,574.4	$	10,860.7	$	0.5	$	10,861.2

¹ Includes excise and sales taxes that remain eligible for inclusion under Topic 606

² Primarily includes collection allowance on excise and sales taxes and other miscellaneous items

Inventories (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Summary of Inventory

Inventories consisted of the following:



(Millions of dollars)	September 30, 2019			December 31, 2018
Finished products - First-In, First-Out ("FIFO") basis	$	276.6		$	219.4
Less: Last-In, First-Out ("LIFO") reserve - finished products	(162.9		)	(115.5		)
Finished products - LIFO basis	113.7			103.9
Store merchandise for resale	113.5			107.2
Materials and supplies	6.6			10.4
Total inventories	$	233.8		$	221.5

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-term debt consisted of the following:



(Millions of dollars)	September 30, 2019			December 31, 2018
6.00% senior notes due 2023 (net of unamortized discount of $4.1 at December 2018)	$	—		$	495.9
5.625% senior notes due 2027 (net of unamortized discount of $2.8 at September 30, 2019 and $3.1 at December 2018)	297.1			296.9
4.75% senior notes due 2029 (net of unamortized discount of $6.2 at September 30, 2019)	493.8			—
Term loan due 2023 (effective interest rate of 4.57% at September 30, 2019)	200.0			—
Term loan due 2020 (effective interest rate of 5.0% at December 31,2018)	—			72.0
Capitalized lease obligations, vehicles, due through 2022	2.5			2.3
Less unamortized debt issuance costs	(5.7		)	(3.8		)
Total long-term debt	987.7			863.3
Less current maturities	21.3			21.2
Total long-term debt, net of current	$	966.4		$	842.1

Asset Retirement Obligations (ARO) (Tables)

9 Months Ended

Sep. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Reconciliation of Beginning and Ending Aggregate Carrying Amount of Asset Retirement Obligation

A reconciliation of the beginning and ending aggregate carrying amount of the ARO is shown in the following table.



(Millions of dollars)	September 30, 2019			December 31, 2018
Balance at beginning of period	$	30.7		$	28.2
Accretion expense	1.6			2.0
Settlements of liabilities	(0.2		)	(0.3		)
Liabilities incurred	0.2			0.8
Balance at end of period	$	32.3		$	30.7

Income Taxes (Tables)

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Summary of Effective Income Tax Rates

For the three and nine month periods ended September 30, 2019 and 2018, the Company’s approximate effective tax rates were as follows:



	2019	2018
Three months ended September 30,	24.2%	21.1%
Nine months ended September 30,	23.7%	21.5%

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share Computations

The following table provides a reconciliation of basic and diluted earnings per share computations for the three and nine months ended September 30, 2019 and 2018:



	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of dollars, except share and per share amounts)	2019		2018		2019		2018
Earnings per common share:
Net income per share - basic
Net income attributable to common stockholders	$	69.2	$	45.0	$	107.2	$	136.1

Weighted average common shares outstanding (in thousands)	31,447		32,213		31,961		32,815

Earnings per common share	$	2.20	$	1.40	$	3.35	$	4.15



	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of dollars, except share and per share amounts)	2019		2018		2019		2018
Earnings per common share - assuming dilution:
Net income per share - diluted
Net income attributable to common stockholders	$	69.2	$	45.0	$	107.2	$	136.1

Weighted average common shares outstanding (in thousands)	31,447		32,213		31,961		32,815
Common equivalent shares:
Dilutive share-based awards	257		323		228		327
Weighted average common shares outstanding - assuming dilution (in thousands)	31,704		32,536		32,189		33,142

Earnings per common share assuming dilution	$	2.18	$	1.38	$	3.33	$	4.11

Other Financial Information (Tables)

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Changes in Operating Working Capital



	Nine Months Ended September 30,
(Millions of dollars)	2019			2018
Accounts receivable	$	(25.4	)	$	(6.0	)
Inventories	(12.3		)	(32.6		)
Prepaid expenses and other current assets	6.8			17.1
Accounts payable and accrued liabilities	27.2			5.7
Net (increase) decrease in noncash operating working capital	$	(3.7	)	$	(15.8	)

Assets and Liabilities Measured at Fair Value (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Carrying Amounts and Estimated Fair Value of Financial Instruments

The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at September 30, 2019 and December 31, 2018. The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table excludes Cash and cash equivalents, Accounts receivable-trade, Restricted cash, and Trade accounts payable and accrued liabilities, all of which had fair values approximating carrying amounts. The fair value of Current and Long-term debt was estimated based on rates offered to the Company at that time for debt of the same maturities. The Company has off-balance sheet exposures relating to certain financial guarantees and letters of credit. The fair value of these, which represents fees associated with obtaining the instruments, was nominal.



	At September 30, 2019						At December 31, 2018
	Carrying						Carrying
(Millions of dollars)	Amount			Fair Value			Amount			Fair Value
Financial liabilities
Current and long-term debt	$	(987.7	)	$	(1,011.6	)	$	(863.3	)	$	(866.7	)

Lease Accounting (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lessee, Lease

Leases are reflected in the following balance sheet accounts:



(Millions of dollars)	Classification	September 30, 2019
Assets
Operating (Right-of-use)	Other Assets	$	118.1
Finance	Property, plant, and equipment, at cost, less accumulated depreciation of $2.2 million	3.1
Total leased assets		$	121.2

Liabilities
Current
Operating	Trade accounts payable and accrued liabilities	$	6.5
Finance	Current maturities of long-term debt	1.3
Noncurrent
Operating	Deferred credits and other liabilities	112.5
Finance	Long-term debt, including capitalized lease obligations	1.2
Total lease liabilities		$	121.5

Lease, Cost



	Nine Months Ended September 30,
	2019
Weighted average remaining lease term (years)
Finance leases	2.1
Operating leases	15.5
Weighted average discount rate
Finance leases	4.9	%
Operating leases	6.1	%

Lease Cost:



		Three Months Ended September 30,		Nine Months Ended September 30,
(Millions of dollars)	Classification	2019		2019
Operating lease cost	Station and other operating expenses	$	3.7	$	10.8
Finance lease cost
Amortization of leased assets	Depreciation & amortization expense	0.3		0.9
Interest on lease liabilities	Interest expense	—		0.1
Net lease costs		$	4.0	$	11.8

Cash flow information:



	Nine Months Ended September 30,
(Millions of dollars)	2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$	10.2
Operating cash flows from finance leases	$	0.1
Financing cash flows from finance leases	$	1.1

Maturity of Lease Liabilities:



(Millions of dollars)	Operating leases		Finance leases
2019	$	7.1	$	0.8
2020	14.3		1.3
2021	13.5		0.8
2022	12.7		0.2
2023	12.1		—
After 2023	146.4		—
Total lease payments	206.1		3.1
less: interest	87.1		0.5
Present value of lease liabilities	$	119.0	$	2.6

Finance Lease, Liability, Maturity

Maturity of Lease Liabilities:



(Millions of dollars)	Operating leases		Finance leases
2019	$	7.1	$	0.8
2020	14.3		1.3
2021	13.5		0.8
2022	12.7		0.2
2023	12.1		—
After 2023	146.4		—
Total lease payments	206.1		3.1
less: interest	87.1		0.5
Present value of lease liabilities	$	119.0	$	2.6

Lessee, Operating Lease, Liability, Maturity

Maturity of Lease Liabilities:



(Millions of dollars)	Operating leases		Finance leases
2019	$	7.1	$	0.8
2020	14.3		1.3
2021	13.5		0.8
2022	12.7		0.2
2023	12.1		—
After 2023	146.4		—
Total lease payments	206.1		3.1
less: interest	87.1		0.5
Present value of lease liabilities	$	119.0	$	2.6

Schedule of Future Minimum Lease Payments for Capital Leases

Future annual minimum lease payments and capital lease commitments as of December 31, 2018 were as follows:



(Millions of dollars)	Operating leases		Capital leases
2019	$	13.7	$	1.5
2020	13.3		1.1
2021	12.5		0.6
2022	11.7		0.1
2023	11.1		—
After 2023	122.6		—
Total lease payments	184.9		3.3
less: interest	—		0.2
Present value of minimum payments	$	184.9	$	3.1

Schedule of Future Minimum Rental Payments for Operating Leases

Future annual minimum lease payments and capital lease commitments as of December 31, 2018 were as follows:



(Millions of dollars)	Operating leases		Capital leases
2019	$	13.7	$	1.5
2020	13.3		1.1
2021	12.5		0.6
2022	11.7		0.1
2023	11.1		—
After 2023	122.6		—
Total lease payments	184.9		3.3
less: interest	—		0.2
Present value of minimum payments	$	184.9	$	3.1

Business Segment (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Summary of Information by Business Segment



			Three Months Ended
			September 30, 2019					September 30, 2018
	Total Assets at		External		Income			External		Income
(Millions of dollars)	September 30, 2019		Revenues		(Loss)			Revenues		(Loss)
Marketing	$	2,199.7	$	3,657.6	$	94.0		$	3,788.0	$	54.6
Corporate and other assets	417.0		—		(24.8		)	—		(9.6		)
Total	$	2,616.7	$	3,657.6	$	69.2		$	3,788.0	$	45.0



	Nine Months Ended
	September 30, 2019					September 30, 2018
	External		Income			External		Income
(Millions of dollars)	Revenues		(Loss)			Revenues		(Loss)
Marketing	$	10,574.3	$	154.7		$	10,860.7	$	126.1
Corporate and other assets	0.1		(47.5		)	0.5		10.0
Total	$	10,574.4	$	107.2		$	10,861.2	$	136.1

Guarantor Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2019

Guarantor Subsidiaries [Abstract]

Consolidating Balance Sheet

CONSOLIDATING BALANCE SHEET



(Millions of dollars, except share amounts)	September 30, 2019
Assets	Parent Company			Issuer		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Current assets
Cash and cash equivalents	$	—		$	246.9	$	0.8		$	—		$	—		$	247.7
Accounts receivable—trade, less allowance for doubtful accounts of $1.2 in 2019	—			164.4		(0.1		)	—			—			164.3
Inventories, at lower of cost or market	—			233.8		—			—			—			233.8
Prepaid expenses and other current assets	—			18.9		0.2			—			—			19.1
Total current assets	—			664.0		0.9			—			—			664.9
Property, plant and equipment, at cost less accumulated depreciation and amortization of $1,074.8 in 2019	—			1,782.6		6.7			—			—			1,789.3
Investments in subsidiaries	2,544.2			144.0		—			—			(2,688.2		)	—
Other assets	—			162.5		—			—			—			162.5
Total assets	$	2,544.2		$	2,753.1	$	7.6		$	—		$	(2,688.2	)	$	2,616.7
Liabilities and Stockholders' Equity
Current liabilities
Current maturities of long-term debt	$	—		$	21.3	$	—		$	—		$	—		$	21.3
Inter-company accounts payable	139.0			58.9		(43.6		)	(154.3		)	—			—
Trade accounts payable and accrued liabilities	—			495.6		—			—			—			495.6
Total current liabilities	139.0			575.8		(43.6		)	(154.3		)	—			516.9
Long-term debt, including capitalized lease obligations	—			966.4		—			—			—			966.4
Deferred income taxes	—			199.0		—			—			—			199.0
Asset retirement obligations	—			32.3		—			—			—			32.3
Deferred credits and other liabilities	—			123.1		—			—			—			123.1
Total liabilities	139.0			1,896.6		(43.6		)	(154.3		)	—			1,837.7
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)	—			—		—			—			—			—
Common Stock, par 0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at September 30, 2019)	0.5			—		0.1			—			(0.1		)	0.5
Treasury Stock (16,007,513 shares held at September 30, 2019)	(1,073.2		)	—		—			—			—			(1,073.2		)
Additional paid in capital (APIC)	1,188.9			576.4		52.0			87.5			(1,368.4		)	536.4
Retained earnings	2,289.0			280.1		(0.9		)	66.8			(1,319.7		)	1,315.3
Total stockholders' equity	2,405.2			856.5		51.2			154.3			(2,688.2		)	779.0
Total liabilities and stockholders' equity	$	2,544.2		$	2,753.1	$	7.6		$	—		$	(2,688.2	)	$	2,616.7

CONSOLIDATING BALANCE SHEET



(Millions of dollars, except share amounts)	December 31, 2018
Assets	Parent Company			Issuer		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Current assets
Cash and cash equivalents	$	—		$	184.0	$	0.5		$	—		$	—		$	184.5
Accounts receivable—trade, less allowance for doubtful accounts of $1.1 in 2018	—			138.8		—			—			—			138.8
Inventories, at lower of cost or market	—			221.5		—			—			—			221.5
Prepaid expenses and other current assets	—			25.1		0.2			—			—			25.3
Total current assets	—			569.4		0.7			—			—			570.1
Property, plant and equipment, at cost less accumulated depreciation and amortization of $974.2 in 2018	—			1,745.9		2.3			—			—			1,748.2
Investments in subsidiaries	2,437.0			144.4		—			—			(2,581.4		)	—
Other assets	—			42.5		—			—			—			42.5
Total assets	$	2,437.0		$	2,502.2	$	3.0		$	—		$	(2,581.4	)	$	2,360.8
Liabilities and Stockholders' Equity
Current liabilities
Current maturities of long-term debt	$	—		$	21.2	$	—		$	—		$	—		$	21.2
Inter-company accounts payable	(0.1		)	203.0		(48.6		)	(154.3		)	—			—
Trade accounts payable and accrued liabilities	—			456.9		—			—			—			456.9
Total current liabilities	(0.1		)	681.1		(48.6		)	(154.3		)	—			478.1
Long-term debt, including capitalized lease obligations	—			842.1		—			—			—			842.1
Deferred income taxes	—			192.2		—			—			—			192.2
Asset retirement obligations	—			30.7		—			—			—			30.7
Deferred credits and other liabilities	—			10.4		—			—			—			10.4
Total liabilities	(0.1		)	1,756.5		(48.6		)	(154.3		)	—			1,553.5
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)	—			—		—			—			—			—
Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at December 31, 2018)	0.5			—		0.1			—			(0.1		)	0.5
Treasury Stock (14,505,681 shares held at December 31, 2018)	(940.3		)	—		—			—			—			(940.3		)
Additional paid in capital (APIC)	1,195.1			572.8		52.0			87.5			(1,368.4		)	539.0
Retained earnings	2,181.8			172.9		(0.5		)	66.8			(1,212.9		)	1,208.1
Total stockholders' equity	2,437.1			745.7		51.6			154.3			(2,581.4		)	807.3
Total liabilities and stockholders' equity	$	2,437.0		$	2,502.2	$	3.0		$	—		$	(2,581.4	)	$	2,360.8

Consolidating Income Statement

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Three Months Ended September 30, 2019
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	2,965.5		$	—		$	—	$	—		$	2,965.5
Merchandise sales	—		681.1			—			—		—			681.1
Other operating revenues	—		11.0			—			—		—			11.0
Total operating revenues	—		3,657.6			—			—		—			3,657.6

Operating Expenses
Petroleum product cost of goods sold	—		2,749.6			—			—		—			2,749.6
Merchandise cost of goods sold	—		569.9			—			—		—			569.9
Station and other operating expenses	—		143.4			—			—		—			143.4
Depreciation and amortization	—		37.6			—			—		—			37.6
Selling, general and administrative	—		36.0			—			—		—			36.0
Accretion of asset retirement obligations	—		0.6			—			—		—			0.6
Total operating expenses	—		3,537.1			—			—		—			3,537.1

Net settlement proceeds	—		—			—			—		—			—
Gain (loss) on sale of assets	—		0.2			—			—		—			0.2
Income (loss) from operations	—		120.7			—			—		—			120.7

Other income (expense)
Interest income	—		0.8			—			—		—			0.8
Interest expense	—		(15.3		)	—			—		—			(15.3		)
Loss on early debt extinguishment	—		(14.8		)	—			—		—			(14.8		)
Other nonoperating income	—		—			(0.1		)	—		—			(0.1		)
Total other income (expense)	—		(29.3		)	(0.1		)	—		—			(29.4		)
Income (loss) before income taxes	—		91.4			(0.1		)	—		—			91.3
Income tax expense	—		22.1			—			—		—			22.1
Income (loss)	—		69.3			(0.1		)	—		—			69.2
Equity earnings in affiliates, net of tax	69.2		(0.1		)	—			—		(69.1		)	—
Net Income (Loss)	$	69.2	$	69.2		$	(0.1	)	$	—	$	(69.1	)	$	69.2

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Three Months Ended September 30, 2018
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	3,151.5		$	—	$	—	$	—		$	3,151.5
Merchandise sales	—		623.7			—		—		—			623.7
Other operating revenues	—		12.8			—		—		—			12.8
Total operating revenues	—		3,788.0			—		—		—			3,788.0

Operating Expenses
Petroleum product cost of goods sold	—		2,991.3			—		—		—			2,991.3
Merchandise cost of goods sold	—		519.2			—		—		—			519.2
Station and other operating expenses	—		139.7			—		—		—			139.7
Depreciation and amortization	—		34.2			—		—		—			34.2
Selling, general and administrative	—		32.6			—		—		—			32.6
Accretion of asset retirement obligations	—		0.5			—		—		—			0.5
Total operating expenses	—		3,717.5			—		—		—			3,717.5

Net settlement proceeds	—		—			—		—		—			—
Gain (loss) on sale of assets	—		(0.5		)	—		—		—			(0.5		)
Income (loss) from operations	—		70.0			—		—		—			70.0

Other income (expense)
Interest income	—		0.2			—		—		—			0.2
Interest expense	—		(13.2		)	—		—		—			(13.2		)
Other nonoperating income	—		—			—		—		—			—
Total other income (expense)	—		(13.0		)	—		—		—			(13.0		)
Income (loss) before income taxes	—		57.0			—		—		—			57.0
Income tax expense	—		12.0			—		—		—			12.0
Income (loss)	—		45.0			—		—		—			45.0
Equity earnings in affiliates, net of tax	45.0		—			—		—		(45.0		)	—
Net Income (Loss)	$	45.0	$	45.0		$	—	$	—	$	(45.0	)	$	45.0

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Nine Months Ended September 30, 2019
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	8,595.0		$	—		$	—	$	—		$	8,595.0
Merchandise sales	—		1,946.1			—			—		—			1,946.1
Other operating revenues	—		33.3			—			—		—			33.3
Total operating revenues	—		10,574.4			—			—		—			10,574.4

Operating Expenses
Petroleum product cost of goods sold	—		8,104.8			—			—		—			8,104.8
Merchandise cost of goods sold	—		1,631.9			—			—		—			1,631.9
Station and other operating expenses	—		421.8			—			—		—			421.8
Depreciation and amortization	—		113.8			—			—		—			113.8
Selling, general and administrative	—		105.7			—			—		—			105.7
Accretion of asset retirement obligations	—		1.6			—			—		—			1.6
Total operating expenses	—		10,379.6			—			—		—			10,379.6

Net settlement proceeds	—		0.1			—			—		—			0.1
Gain (loss) on sale of assets	—		0.1			—			—		—			0.1
Income (loss) from operations	—		195.0			—			—		—			195.0

Other income (expense)
Interest income	—		2.4			—			—		—			2.4
Interest expense	—		(42.1		)	—			—		—			(42.1		)
Loss on early debt extinguishment	—		(14.8		)	—			—		—			(14.8		)
Other nonoperating income	—		0.5			(0.5		)	—		—			—
Total other income (expense)	—		(54.0		)	(0.5		)	—		—			(54.5		)
Income (loss) before income taxes	—		141.0			(0.5		)	—		—			140.5
Income tax expense	—		33.4			(0.1		)	—		—			33.3
Income (loss)	—		107.6			(0.4		)	—		—			107.2
Equity earnings in affiliates, net of tax	107.2		(0.4		)	—			—		(106.8		)	—
Net Income (Loss)	$	107.2	$	107.2		$	(0.4	)	$	—	$	(106.8	)	$	107.2

CONSOLIDATING INCOME STATEMENT



(Millions of dollars)	Nine Months Ended September 30, 2018
Operating Revenues	Parent Company		Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Petroleum product sales	$	—	$	8,982.8		$	—		$	—	$	—		$	8,982.8
Merchandise sales	—		1,807.5			—			—		—			1,807.5
Other operating revenues	—		70.9			—			—		—			70.9
Total operating revenues	—		10,861.2			—			—		—			10,861.2

Operating Expenses
Petroleum product cost of goods sold	—		8,584.9			—			—		—			8,584.9
Merchandise cost of goods sold	—		1,509.2			—			—		—			1,509.2
Station and other operating expenses	—		401.9			—			—		—			401.9
Depreciation and amortization	—		99.0			—			—		—			99.0
Selling, general and administrative	—		102.3			—			—		—			102.3
Accretion of asset retirement obligations	—		1.5			—			—		—			1.5
Total operating expenses	—		10,698.8			—			—		—			10,698.8

Net settlement proceeds	—		50.4			—			—		—			50.4
Gain (loss) on sale of assets	—		(0.7		)	—			—		—			(0.7		)
Income (loss) from operations	—		212.1			—			—		—			212.1

Other income (expense)
Interest income	—		0.8			—			—		—			0.8
Interest expense	—		(39.6		)	—			—		—			(39.6		)
Other nonoperating income	—		0.2			(0.1		)	—		—			0.1
Total other income (expense)	—		(38.6		)	(0.1		)	—		—			(38.7		)
Income (loss) before income taxes	—		173.5			(0.1		)	—		—			173.4
Income tax expense	—		37.3			—			—		—			37.3
Income (loss)	—		136.2			(0.1		)	—		—			136.1
Equity earnings in affiliates, net of tax	136.1		(0.1		)	—			—		(136.0		)	—
Net Income (Loss)	$	136.1	$	136.1		$	(0.1	)	$	—	$	(136.0	)	$	136.1

Consolidating Statement of Cash Flow

CONSOLIDATING STATEMENT OF CASH FLOW



(Millions of dollars)	Nine Months Ended September 30, 2019
Operating Activities	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	107.2		$	107.2		$	(0.4	)	$	—	$	(106.8	)	$	107.2
Adjustments to reconcile net income (loss) to net cash provided by (required by) operating activities
Depreciation and amortization	—			113.8			—			—		—			113.8
Deferred and noncurrent income tax charges (credits)	—			6.9			—			—		—			6.9
Accretion of asset retirement obligations	—			1.6			—			—		—			1.6
(Gain) loss on sale of assets	—			(0.1		)	—			—		—			(0.1		)
Net (increase) decrease in noncash operating working capital	—			(3.6		)	(0.1		)	—		—			(3.7		)
Equity in earnings of affiliates	(107.2		)	0.4			—			—		106.8			—
Loss on early debt extinguishment	—			14.8			—			—		—			14.8
Other operating activities - net	—			11.1			—			—		—			11.1
Net cash provided by (required by) operating activities	—			252.1			(0.5		)	—		—			251.6
Investing Activities
Property additions	—			(149.3		)	(4.4		)	—		—			(153.7		)
Proceeds from sale of assets	—			2.4			—			—		—			2.4
Other investing activities - net	—			(0.7		)	—			—		—			(0.7		)
Net cash provided by (required by) investing activities	—			(147.6		)	(4.4		)	—		—			(152.0		)
Financing Activities
Purchase of treasury stock	(139.1		)	—			—			—		—			(139.1		)
Borrowings of debt	—			693.7			—			—		—			693.7
Repayments of debt	—			(573.1		)	—			—		—			(573.1		)
Debt issuance costs	—			(3.1		)	—			—		—			(3.1		)
Early debt extinguishment costs	—			(10.4		)	—			—		—			(10.4		)
Amounts related to share-based compensation	—			(4.4		)	—			—		—			(4.4		)
Net distributions to parent	139.1			(144.3		)	5.2			—		—			—
Net cash provided by (required by) financing activities	—			(41.6		)	5.2			—		—			(36.4		)
Net increase (decrease) in cash and cash equivalents	—			62.9			0.3			—		—			63.2
Cash, cash equivalents, and restricted cash at January 1	—			184.0			0.5			—		—			184.5
Cash, cash equivalents, and restricted cash at September 30	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7

Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents at beginning of period	$	—		$	184.0		$	0.5		$	—	$	—		$	184.5
Restricted cash at beginning of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at beginning of period	$	—		$	184.0		$	0.5		$	—	$	—		$	184.5

Cash and cash equivalents at end of period	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7
Restricted cash at end of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at end of period	$	—		$	246.9		$	0.8		$	—	$	—		$	247.7

CONSOLIDATING STATEMENT OF CASH FLOW



(Millions of dollars)	Nine Months Ended September 30, 2018
Operating Activities	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	136.1		$	136.1		$	(0.1	)	$	—	$	(136.0	)	$	136.1
Adjustments to reconcile net income (loss) to net cash provided by (required by)operating activities
Depreciation and amortization	—			99.0			—			—		—			99.0
Deferred and noncurrent income tax charges (credits)	—			13.9			—			—		—			13.9
Accretion of asset retirement obligations	—			1.5			—			—		—			1.5
Pretax (gains) losses from sale of assets	—			0.7			—			—		—			0.7
Net (increase) decrease in noncash operating working capital	—			(15.8		)	—			—		—			(15.8		)
Equity in earnings of affiliates	(136.1		)	0.1			—			—		136.0			—
Other operating activities - net	—			6.0			—			—		—			6.0
Net cash provided by (required by) operating activities	—			241.5			(0.1		)	—		—			241.4
Investing Activities
Property additions	—			(162.2		)	(0.8		)	—		—			(163.0		)
Proceeds from sale of assets	—			1.2			—			—		—			1.2
Other investing activities - net	—			(5.9		)	—			—		—			(5.9		)
Net cash provided by (required by) investing activities	—			(166.9		)	(0.8		)	—		—			(167.7		)
Financing Activities
Purchase of treasury stock	(144.4		)	—			—			—		—			(144.4		)
Repayments of debt	—			(15.9		)	—			—		—			(15.9		)
Amounts related to share-based compensation	—			(8.0		)	—			—		—			(8.0		)
Net distributions to parent	144.4			(145.9		)	1.5			—		—			—
Net cash provided by (required) by financing activities	—			(169.8		)	1.5			—		—			(168.3		)
Net increase (decrease) in cash and cash equivalents	—			(95.2		)	0.6			—		—			(94.6		)
Cash, cash equivalents, and restricted cash at January 1	—			169.9			0.1			—		—			170.0
Cash, cash equivalents, and restricted cash at September 30	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4

Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents at beginning of period	$	—		$	169.9		$	0.1		$	—	$	—		$	170.0
Restricted cash at beginning of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at beginning of period	$	—		$	169.9		$	0.1		$	—	$	—		$	170.0

Cash and cash equivalents at end of period	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4
Restricted cash at end of period	—			—			—			—		—			—
Cash, cash equivalents, and restricted cash at end of period	$	—		$	74.7		$	0.7		$	—	$	—		$	75.4

Consolidating Statement of Changes in Equity

CONSOLIDATING STATEMENT OF CHANGES IN EQUITY



(Millions of dollars)	Nine Months Ended September 30, 2019
Statement of Stockholders' Equity	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Common Stock
Balance as of December 31, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of March 31, 2019	0.5			—			0.1			—		(0.1		)	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of June 30, 2019	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of September 30, 2019	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Treasury Stock
Balance as of December 31, 2018	$	(940.3	)	$	—		$	—		$	—	$	—		$	(940.3	)
Issuance of treasury stock	5.6			—			—			—		—			5.6
Repurchase of treasury stock	(13.3		)	—			—			—		—			(13.3		)
Balance as of March 31, 2019	$	(948.0	)	$	—		$	—		$	—	$	—		(948.0		)
Issuance of treasury stock	0.1			—			—			—		—			0.1
Repurchase of treasury stock	(16.8		)	—			—			—		—			(16.8		)
Balance as of June 30, 2019	$	(964.7	)	$	—		$	—		$	—	$	—		$	(964.7	)
Issuance of treasury stock	0.5			—			—			—		—			0.5
Repurchase of treasury stock	(109.0		)	—			—			—		—			(109.0		)
Balance as of September 30, 2019	$	(1,073.2	)	$	—		$	—		$	—	$	—		$	(1,073.2	)
APIC
Balance as of December 31, 2018	$	1,195.1		$	572.8		$	52.0		$	87.5	$	(1,368.4	)	$	539.0
Issuance of treasury stock	(5.6		)	—			—			—		—			(5.6		)
Amounts related to share-based compensation	—			(4.1		)	—			—		—			(4.1		)
Share-based compensation expense	—			2.6			—			—		—			2.6
Balance as of March 31, 2019	$	1,189.5		$	571.3		$	52.0		$	87.5	$	(1,368.4	)	531.9
Issuance of treasury stock	(0.1		)	$	—		$	—		$	—	$	—		(0.1		)
Amounts related to share-based compensation	—			(0.2		)	—			—		—			(0.2		)
Share-based compensation expense	—			2.8			—			—		—			2.8
Balance as of June 30, 2019	$	1,189.4		$	573.9		$	52.0		$	87.5	$	(1,368.4	)	$	534.4
Issuance of treasury stock	(0.5		)	$	—		$	—		$	—	$	—		(0.5		)
Amounts related to share-based compensation	—			(0.1		)	—			—		—			(0.1		)
Share-based compensation expense	—			2.6			—			—		—			2.6
Balance as of September 30, 2019	$	1,188.9		$	576.4		$	52.0		$	87.5	$	(1,368.4	)	$	536.4
Retained Earnings
Balance as of December 31, 2018	$	2,181.8		$	172.9		$	(0.5	)	$	66.8	$	(1,212.9	)	$	1,208.1
Net income (loss)	5.3			5.3			(0.2		)	—		(5.1		)	5.3
Balance as of March 31, 2019	$	2,187.1		$	178.2		$	(0.7	)	$	66.8	$	(1,218.0	)	1,213.4
Net income (loss)	32.7			32.7			$	(0.1	)	—		(32.6		)	32.7
Balance as of June 30, 2019	$	2,219.8		$	210.9		$	(0.8	)	$	66.8	$	(1,250.6	)	$	1,246.1
Net income (loss)	69.2			69.2			(0.1		)	—		(69.1		)	69.2
Balance as of September 30, 2019	$	2,289.0		$	280.1		$	(0.9	)	$	66.8	$	(1,319.7	)	$	1,315.3

CONSOLIDATING STATEMENT OF CHANGES IN EQUITY



(Millions of dollars)	Nine Months Ended September 30, 2018
Statement of Stockholders' Equity	Parent Company			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Common Stock
Balance as of December 31, 2017	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of March 31, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			$	—		—		—			—
Balance as of June 30, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Issuance of common stock	—			—			—			—		—			—
Balance as of September 30, 2018	$	0.5		$	—		$	0.1		$	—	$	(0.1	)	$	0.5
Treasury Stock
Balance as of December 31, 2017	$	(806.5	)	$	—		$	—		$	—	$	—		$	(806.5	)
Issuance of treasury stock	4.4			—			—			—		—			4.4
Repurchase of treasury stock	(71.7		)	—			—			—		—			(71.7		)
Balance as of March 31, 2018	$	(873.8	)	$	—		$	—		$	—	$	—		(873.8		)
Issuance of treasury stock	0.6			$	—		$	—		$	—	$	—		0.6
Repurchase of treasury stock	(72.7		)	$	—		$	—		$	—	$	—		(72.7		)
Balance as of June 30, 2018	$	(945.9	)	$	—		$	—		$	—	$	—		$	(945.9	)
Issuance of treasury stock	4.3			—			—			—		—			4.3
Repurchase of treasury stock	—			—			—			—		—			—
Balance as of September 30, 2018	$	(941.6	)	$	—		$	—		$	—	$	—		$	(941.6	)
APIC
Balance as of December 31, 2017	$	1,205.7		$	573.1		$	52.0		$	87.5	$	(1,368.4	)	$	549.9
Issuance of treasury stock	(4.4		)	—			—			—		—			(4.4		)
Amounts related to share-based compensation	—			(2.9		)	—			—		—			(2.9		)
Share-based compensation expense	—			2.2			—			—		—			2.2
Balance as of March 31, 2018	$	1,201.3		$	572.4		$	52.0		$	87.5	$	(1,368.4	)	$	544.8
Issuance of treasury stock	(0.6		)	—			—			—		—			(0.6		)
Amounts related to share-based compensation	—			(0.5		)	—			—		—			(0.5		)
Share-based compensation expense	—			2.4			—			—		—			2.4
Balance as of June 30, 2018	$	1,200.7		$	574.3		$	52.0		$	87.5	$	(1,368.4	)	$	546.1
Issuance of treasury stock	(4.3		)												(4.3		)
Amounts related to share-based compensation	—			(4.6		)	—			—		—			(4.6		)
Share-based compensation expense	—			2.2			—			—		—			2.2
Balance as of September 30, 2018	$	1,196.4		$	571.9		$	52.0		$	87.5	$	(1,368.4	)	$	539.4
Retained Earnings
Balance as of December 31, 2017	$	994.5		$	933.0		$	—		$	66.8	$	(999.8	)	$	994.5
Net income (loss)	39.3			39.3			—			—		(39.3		)	39.3
Balance as of March 31, 2018	$	1,033.8		$	972.3		$	—		$	66.8	$	(1,039.1	)	1,033.8
Net income (loss)	51.8			51.8			(0.1		)	—		(51.7		)	51.8
Balance as of June 30, 2018	$	1,085.6		$	1,024.1		$	(0.1	)	$	66.8	$	(1,090.8	)	$	1,085.6
Net income (loss)	45.0			45.0			—			—		(45.0		)	45.0
Balance as of September 30, 2018	$	1,130.6		$	1,069.1		$	(0.1	)	$	66.8	$	(1,135.8	)	$	1,130.6

Description of Business and Basis of Presentation (Details)		1 Months Ended
	Aug. 30, 2013	Mar. 31, 2013 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) state station $ / shares	Jan. 01, 2019 USD ($)	Dec. 31, 2018 $ / shares
Product Information [Line Items]
Number of states in which entity operates \| state			26
Number of stations \| station			1,479
Common stock shares issued (in shares) \| shares		100
Common stock par value (in dollars per share) \| $ / shares		$ 0.01	$ 0.01		$ 0.01
Proceeds from issuance of common stock		$ 1.00
Percentage of shares of stock distributed	100.00%
Lease asset			$ 118,100,000
Lease liability			$ 119,000,000.0
Accounting Standards Update 2016-02
Product Information [Line Items]
Lease asset				$ 110,400,000
Lease liability				$ 110,700,000
Murphy USA
Product Information [Line Items]
Number of stations \| station			1,160
Murphy Express
Product Information [Line Items]
Number of stations \| station			319

Revenues (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,657.6	$ 3,788.0	$ 10,574.4	$ 10,861.2
Total petroleum product sales
Disaggregation of Revenue [Line Items]
Total revenues	2,965.5	3,151.5	8,595.0	8,982.8
Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Total revenues	2,660.8	2,770.1	7,717.7	7,910.6
Petroleum product sales (at wholesale)
Disaggregation of Revenue [Line Items]
Total revenues	304.7	381.4	877.3	1,072.2
Merchandise sales
Disaggregation of Revenue [Line Items]
Total revenues	681.1	623.7	1,946.1	1,807.5
RINs
Disaggregation of Revenue [Line Items]
Total revenues	8.6	11.6	28.6	67.3
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	2.4	1.2	4.7	3.6
Operating Segments \| Marketing
Disaggregation of Revenue [Line Items]
Total revenues	3,657.6	3,788.0	10,574.3	10,860.7
Operating Segments \| Marketing \| Total petroleum product sales
Disaggregation of Revenue [Line Items]
Total revenues	2,965.5	3,151.5	8,595.0	8,982.8
Operating Segments \| Marketing \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Total revenues	2,660.8	2,770.1	7,717.7	7,910.6
Operating Segments \| Marketing \| Petroleum product sales (at wholesale)
Disaggregation of Revenue [Line Items]
Total revenues	304.7	381.4	877.3	1,072.2
Operating Segments \| Marketing \| Merchandise sales
Disaggregation of Revenue [Line Items]
Total revenues	681.1	623.7	1,946.1	1,807.5
Operating Segments \| Marketing \| RINs
Disaggregation of Revenue [Line Items]
Total revenues	8.6	11.6	28.6	67.3
Operating Segments \| Marketing \| Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	2.4	1.2	4.6	3.1
Corporate and other assets
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.1	0.5
Corporate and other assets \| Total petroleum product sales
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Corporate and other assets \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Corporate and other assets \| Petroleum product sales (at wholesale)
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Corporate and other assets \| Merchandise sales
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Corporate and other assets \| RINs
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Corporate and other assets \| Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 0.0	$ 0.0	$ 0.1	$ 0.5

Revenues (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Revenues (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Trade accounts receivable	$ 164.3	$ 138.8
Receivables related to contracts with customers
Disaggregation of Revenue [Line Items]
Trade accounts receivable	$ 96.2	$ 79.4
Bulk pipelines sales
Disaggregation of Revenue [Line Items]
Collection period	7 days
Petroleum product sales, rack sales
Disaggregation of Revenue [Line Items]
Collection period	10 days
RINs
Disaggregation of Revenue [Line Items]
Collection period	5 days
Minimum \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Collection period	2 days
Maximum \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Collection period	7 days

Inventories (Summary Of Inventory) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished products - First-In, First-Out (FIFO) basis	$ 276.6	$ 219.4
Less: Last-In, First-Out (LIFO) reserve - finished products	(162.9)	(115.5)
Finished products - LIFO basis	113.7	103.9
Store merchandise for resale	113.5	107.2
Materials and supplies	6.6	10.4
Total inventories	$ 233.8	$ 221.5

Inventories - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
LIFO inventories in excess of carrying value	$ 162.9	$ 115.5

Long-Term Debt (Summary Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 13, 2019	Dec. 31, 2018	Apr. 25, 2017
Debt Instrument [Line Items]
Capitalized lease obligations, vehicles, due through 2022	$ 2.5		$ 2.3
Less unamortized debt issuance costs	(5.7)		(3.8)
Total long-term debt	987.7		863.3
Less current maturities	21.3		21.2
Total long-term debt, net of current	966.4		842.1
Senior Notes \| 6.00% senior notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.0		495.9
Stated interest rate	6.00%	6.00%
Unamortized discount			4.1
Senior Notes \| 5.625% senior notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 297.1		296.9
Stated interest rate	5.625%			5.625%
Unamortized discount	$ 2.8		3.1
Senior Notes \| 4.75% senior notes due 2029
Debt Instrument [Line Items]
Stated interest rate		4.75%
Secured Debt \| 4.75% senior notes due 2029 \| Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	$ 493.8		0.0
Stated interest rate	4.75%
Unamortized discount	$ 6.2
Secured Debt \| Term loan due 2023 \| Term facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 200.0		0.0
Effective interest rate	4.57%
Secured Debt \| Term loan due 2020 \| Term facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.0		$ 72.0
Effective interest rate			5.00%

Long-Term Debt (Narrative) (Details) - USD ($)			9 Months Ended
Long-Term Debt (Narrative) (Details) - USD ($)	Sep. 13, 2019	Aug. 27, 2019	Sep. 30, 2019	Sep. 30, 2018	Aug. 31, 2019	Apr. 25, 2017
Debt Instrument [Line Items]
Repayments of debt			$ 573,100,000	$ 15,900,000
Fixed charge coverage ratio			1.1
Fixed charge coverage ratio threshold, percentage of aggregate facility commitments and borrowing base			17.50%
Fixed charge coverage ratio threshold, amount of aggregate facility commitments and borrowing base			$ 70,000,000
Secured debt to EBITDA ratio			0.43
Dividend restrictions			The credit agreement contains restrictions on certain payments, including dividends, when availability under the credit agreement is less than or equal to the greater of $100 million and 25% of the lesser of the revolving commitments and the borrowing base and our fixed charge coverage ratio is less than 1.0 to 1.0 (unless availability under the credit agreement is greater than $100 million and 40% of the lesser of the revolving commitments and the borrowing base). As of September 30, 2019 and December 31, 2018, our ability to make restricted payments was not limited as our fixed charge coverage ratio was greater than 1.0 to 1.0.
Minimum
Debt Instrument [Line Items]
Fixed charge coverage ratio			1.0
Period for fixed charge coverage ratio threshold (in days)			3 days
Dividend restriction threshold as amount of availability			$ 100,000,000
Dividend restriction threshold as a percentage of revolving commitments and borrowing base			25.00%
Dividend restrictions, fixed charge coverage ratio			1.0
Maximum
Debt Instrument [Line Items]
Secured debt to EBITDA ratio			4.5
Dividend restriction threshold as amount of availability with consideration of fixed charge coverage ratio			$ 100,000,000
Dividend restriction threshold as a percentage of revolving commitments and borrowing base with consideration of fixed charge coverage ratio			40.00%
Federal Funds Rate
Debt Instrument [Line Items]
Spread over variable rate (percent)			0.50%
LIBOR
Debt Instrument [Line Items]
Spread over variable rate (percent)			1.00%
Interest period one (in months)			1 month
Interest period two (in months)			2 months
Interest period three (in months)			3 months
Interest period four (in months)			6 months
Cash
Debt Instrument [Line Items]
Percentage of asset available to borrow against			100.00%
Credit Card Receivables
Debt Instrument [Line Items]
Percentage of asset available to borrow against			90.00%
Investment Grade Accounts
Debt Instrument [Line Items]
Percentage of asset available to borrow against			90.00%
Other Accounts
Debt Instrument [Line Items]
Percentage of asset available to borrow against			85.00%
Midstream Refined Products Inventory
Debt Instrument [Line Items]
Percentage of asset available to borrow against			80.00%
Refined Retail Products Inventory
Debt Instrument [Line Items]
Percentage of asset available to borrow against			75.00%
Retail Merchandise Inventory
Debt Instrument [Line Items]
Percentage of asset available to borrow against			70.00%
Percentage of net orderly liquidation value available to borrow against			85.00%
ABL facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 325,000,000
ABL facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Spread over variable rate (percent)			1.50%
ABL facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Spread over variable rate (percent)			2.00%
ABL facility \| Alternate Base Rate \| Minimum
Debt Instrument [Line Items]
Spread over variable rate (percent)			0.50%
ABL facility \| Alternate Base Rate \| Maximum
Debt Instrument [Line Items]
Spread over variable rate (percent)			1.00%
Term facility
Debt Instrument [Line Items]
Repayments of debt		$ 57,000,000
Line of credit facility, maximum borrowing capacity					200,000,000
Proceeds borrowed from credit facility		$ 200,000,000
Term of facility		4 years
Asset-based loan facility, portion included in current maturities			$ 200,000,000
Term facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Spread over variable rate (percent)			2.50%
Term facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Spread over variable rate (percent)			2.75%
Term facility \| Alternate Base Rate \| Minimum
Debt Instrument [Line Items]
Spread over variable rate (percent)			1.50%
Term facility \| Alternate Base Rate \| Maximum
Debt Instrument [Line Items]
Spread over variable rate (percent)			1.75%
Additional Term Loan Available Until December 2019
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					50,000,000
Uncommitted incremental facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 150,000,000
Letters of credit
Debt Instrument [Line Items]
Line of credit facility, sublimit			$ 100,000,000
4.75% senior notes due 2029 \| Senior Notes
Debt Instrument [Line Items]
Senior notes, principal amount	$ 500,000,000
Interest rate	4.75%
6% Senior Notes Due 2023 \| Senior Notes
Debt Instrument [Line Items]
Senior notes, principal amount	$ 500,000,000
Interest rate	6.00%		6.00%
Repayments of debt	$ 514,500,000
5.625% Senior Notes Due 2027 \| Senior Notes
Debt Instrument [Line Items]
Senior notes, principal amount						$ 300,000,000
Interest rate			5.625%			5.625%
Asset Based Loan Facility \| ABL facility \| ABL facility
Debt Instrument [Line Items]
Asset-based loan facility, portion included in current maturities			$ 0

Asset Retirement Obligations (ARO) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Asset Retirement Obligation Roll Forward
Balance at beginning of period			$ 30.7	$ 28.2	$ 28.2
Accretion expense	$ 0.6	$ 0.5	1.6	$ 1.5	2.0
Settlements of liabilities			(0.2)		(0.3)
Liabilities incurred			0.2		0.8
Balance at end of period	$ 32.3		$ 32.3		$ 30.7

Income Taxes (Summary of Effective Income Tax Rates) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	24.20%	21.10%	23.70%	21.50%

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Total excess tax benefits	$ 0.9	$ 2.8
Tax benefit, settlement of uncertain tax positions		$ 2.7

Incentive Plans (Details)				3 Months Ended	9 Months Ended
Incentive Plans (Details)	Mar. 26, 2019 $ / shares shares	Feb. 06, 2019 $ / shares company shares	Aug. 30, 2013 USD ($) shares	Mar. 31, 2019 $ / shares shares	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Aug. 08, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation \| $					$ 8,000,000.0	$ 6,800,000
Total income tax benefits realized from tax deductions related to stock option exercises under share-based payment arrangements \| $					$ 100,000	$ 2,100,000
2013 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for incentive plan (no more than) (in shares)			5,500,000
Number of shares per employee (no more than) (in shares)			1,000,000
2013 Long-Term Incentive Plan \| Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount payable \| $			$ 5,000,000.0
Restricted stock units issued (in shares)		53,100
2013 Long-Term Incentive Plan \| Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		99,400
Shares granted, exercise price (in dollars per share) \| $ / shares		$ 76.15
Shares granted, fair value (in dollars per share) \| $ / shares		20.48
2013 Long-Term Incentive Plan \| Return On Average Capital Employed Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares		$ 76.15
Award vesting period (in years)		3 years
2013 Long-Term Incentive Plan \| Total Shareholder Return Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares		$ 100.65
Award vesting period (in years)		3 years
Number of companies in total shareholder return peer comparison group \| company		16
2013 Long-Term Incentive Plan, RSU Grant One \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued (in shares)		26,550
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares		$ 76.15
2013 Long-Term Incentive Plan, RSU Grant Two \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued (in shares)	46,725
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 82.84
2013 Stock Plan For Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for incentive plan (no more than) (in shares)							500,000
2013 Stock Plan For Non-Employee Directors \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued (in shares)				13,086
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares				$ 76.63
Award vesting period (in years)				3 years

Financial Instruments and Risk Management (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Prepaid expenses and other current assets
Derivative [Line Items]
Cash deposits related to commodity derivative contracts	$ 1.0	$ 1.0

Earnings Per Share (Narrative) (Details) - USD ($)		9 Months Ended
Earnings Per Share (Narrative) (Details) - USD ($)	Jul. 24, 2019	Sep. 30, 2019	Sep. 30, 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 400,000,000
Stock repurchase program, period	2 years
January 2016 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, shares acquired (in shares)		1,597,731	1,994,632
Stock repurchase program, average price per share (in dollars per share)		$ 87.09	$ 72.39

Earnings Per Share (Reconciliation of Basic and Diluted Earnings Per Share Computations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income per share - basic
Net income attributable to common stockholders	$ 69.2	$ 32.7	$ 5.3	$ 45.0	$ 51.8	$ 39.3	$ 107.2	$ 136.1
Weighted average common shares outstanding (in shares)	31,447			32,213			31,961	32,815
Earnings per common share (in dollars per share)	$ 2.20			$ 1.40			$ 3.35	$ 4.15
Net income per share - diluted
Net income attributable to common stockholders	$ 69.2	$ 32.7	$ 5.3	$ 45.0	$ 51.8	$ 39.3	$ 107.2	$ 136.1
Weighted average common shares outstanding (in shares)	31,447			32,213			31,961	32,815
Common equivalent shares:
Dilutive share-based awards (in shares)	257			323			228	327
Weighted average common shares outstanding - assuming dilution (in shares)	31,704			32,536			32,189	33,142
Earnings per common share assuming dilution (in dollars per share)	$ 2.18			$ 1.38			$ 3.33	$ 4.11

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Other Financial Information (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash income taxes paid (collected), net of refunds	$ 16.2	$ 12.0
Interest paid, net of amounts capitalized	$ 46.0	$ 41.0

Other Financial Information (Summary of Changes in Operating Working Capital) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ (25.4)	$ (6.0)
Inventories	(12.3)	(32.6)
Prepaid expenses and other current assets	6.8	17.1
Accounts payable and accrued liabilities	27.2	5.7
Net (increase) decrease in noncash operating working capital	$ (3.7)	$ (15.8)

Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Carrying Amount
Financial liabilities
Current and long-term debt	$ (987.7)	$ (863.3)
Fair Value
Financial liabilities
Current and long-term debt	$ (1,011.6)	$ (866.7)

Contingencies (Details) $ in Millions	9 Months Ended
Contingencies (Details) $ in Millions	Sep. 30, 2019 USD ($) site
Loss Contingencies [Line Items]
Number of Superfund sites for which company may be liable \| site	1
Outstanding letters of credit	$ 17.0
Workers Compensation Insurance Claims
Loss Contingencies [Line Items]
Insurance deductible amount	1.0
General Liability Insurance Claims
Loss Contingencies [Line Items]
Insurance deductible amount	3.0
Auto Liability Insurance Claims
Loss Contingencies [Line Items]
Insurance deductible amount	0.3
Insurance Claims
Loss Contingencies [Line Items]
Loss contingency accrual	$ 21.3

Lease Accounting (Narrative) (Details)	9 Months Ended
Lease Accounting (Narrative) (Details)	Sep. 30, 2019 site contract
Lessee, Lease, Description [Line Items]
Number of leases with restrictive covenants \| site	102
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Lease renewal term	5 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	20 years
Lease renewal term	20 years
Land
Lessee, Lease, Description [Line Items]
Number of leases	216
Terminal
Lessee, Lease, Description [Line Items]
Number of leases	1
Hangar
Lessee, Lease, Description [Line Items]
Number of leases	1

Lease Accounting (Leases Reflected on Balance Sheet) (Details) $ in Millions	Sep. 30, 2019 USD ($)
Assets
Operating	$ 118.1
Finance	3.1
Total leased assets	121.2
Current
Operating	6.5
Finance	1.3
Noncurrent
Operating	112.5
Finance	1.2
Total lease liabilities	121.5
Accumulated depreciation	$ 2.2

Lease Accounting (Lease Cost) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 3.7	$ 10.8
Finance lease cost
Amortization of leased assets	0.3	0.9
Interest on lease liabilities	0.0	0.1
Net lease costs	$ 4.0	$ 11.8

Lease Accounting (Cash Flow Information) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$ 10.2
Operating cash flows from finance leases	0.1
Financing cash flows from finance leases	$ 1.1

Lease Accounting (Maturity of Lease Liability) (Details) $ in Millions	Sep. 30, 2019 USD ($)
Operating leases
2019	$ 7.1
2020	14.3
2021	13.5
2022	12.7
2023	12.1
After 2023	146.4
Total lease payments	206.1
less: interest	87.1
Present value of lease liabilities	119.0
Finance leases
2019	0.8
2020	1.3
2021	0.8
2022	0.2
2023	0.0
After 2023	0.0
Total lease payments	3.1
less: interest	0.5
Present value of lease liabilities	$ 2.6

Lease Accounting (Leases Under Topic 840) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Operating leases
2019	$ 13.7
2020	13.3
2021	12.5
2022	11.7
2023	11.1
After 2023	122.6
Total lease payments	184.9
Capital leases
2019	1.5
2020	1.1
2021	0.6
2022	0.1
2023	0.0
After 2023	0.0
Total lease payments	3.3
less: interest	0.2
Present value of minimum payments	$ 3.1

Lease Accounting (Lease Term and Discount Rate) (Details)	Sep. 30, 2019
Weighted average remaining lease term (years)
Finance leases	2 years 1 month 6 days
Operating leases	15 years 6 months
Weighted average discount rate
Finance leases	4.90%
Operating leases	6.10%

Business Segment (Narrative) (Details)	9 Months Ended
Business Segment (Narrative) (Details)	Sep. 30, 2019 segment
Segment Reporting [Abstract]
Number of operating segments	1

Business Segment (Summary of Information by Business Segment) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total Assets	$ 2,616.7						$ 2,616.7		$ 2,360.8
External revenues	3,657.6			$ 3,788.0			10,574.4	$ 10,861.2
Income (Loss)	69.2	$ 32.7	$ 5.3	45.0	$ 51.8	$ 39.3	107.2	136.1
Operating Segments \| Marketing
Segment Reporting Information [Line Items]
Total Assets	2,199.7						2,199.7
External revenues	3,657.6			3,788.0			10,574.3	10,860.7
Income (Loss)	94.0			54.6			154.7	126.1
Corporate and other assets
Segment Reporting Information [Line Items]
Total Assets	417.0						417.0
External revenues	0.0			0.0			0.1	0.5
Income (Loss)	$ (24.8)			$ (9.6)			$ (47.5)	$ 10.0

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Guarantor Subsidiaries (Additional Information) (Details) - Senior Notes	Sep. 30, 2019	Sep. 13, 2019	Apr. 25, 2017
4.75% senior notes due 2029
Debt Instrument [Line Items]
Interest rate		4.75%
5.625% Senior Notes Due 2027
Debt Instrument [Line Items]
Interest rate	5.625%		5.625%

Guarantor Subsidiaries (Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 247.7			$ 184.5	$ 75.4			$ 170.0
Accounts receivable—trade, less allowance for doubtful accounts	164.3			138.8
Inventories, at lower of cost or market	233.8			221.5
Prepaid expenses and other current assets	19.1			25.3
Total current assets	664.9			570.1
Property, plant and equipment, at cost less accumulated depreciation and amortization	1,789.3			1,748.2
Investments in subsidiaries	0.0			0.0
Other assets	162.5			42.5
Total assets	2,616.7			2,360.8
Current liabilities
Current maturities of long-term debt	21.3			21.2
Inter-company accounts payable	0.0			0.0
Trade accounts payable and accrued liabilities	495.6			456.9
Total current liabilities	516.9			478.1
Long-term debt, including capitalized lease obligations	966.4			842.1
Deferred income taxes	199.0			192.2
Asset retirement obligations	32.3			30.7
Deferred credits and other liabilities	123.1			10.4
Total liabilities	1,837.7			1,553.5
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	0.5			0.5
Treasury Stock	(1,073.2)			(940.3)
Additional paid in capital (APIC)	536.4			539.0
Retained earnings	1,315.3			1,208.1
Total stockholders' equity	779.0	$ 816.3	$ 797.8	807.3	728.9	$ 686.3	$ 705.3	738.4
Total liabilities and stockholders' equity	2,616.7			2,360.8
Eliminations
Current assets
Cash and cash equivalents	0.0			0.0	0.0			0.0
Accounts receivable—trade, less allowance for doubtful accounts	0.0			0.0
Inventories, at lower of cost or market	0.0			0.0
Prepaid expenses and other current assets	0.0			0.0
Total current assets	0.0			0.0
Property, plant and equipment, at cost less accumulated depreciation and amortization	0.0			0.0
Investments in subsidiaries	(2,688.2)			(2,581.4)
Other assets	0.0			0.0
Total assets	(2,688.2)			(2,581.4)
Current liabilities
Current maturities of long-term debt	0.0			0.0
Inter-company accounts payable	0.0			0.0
Trade accounts payable and accrued liabilities	0.0			0.0
Total current liabilities	0.0			0.0
Long-term debt, including capitalized lease obligations	0.0			0.0
Deferred income taxes	0.0			0.0
Asset retirement obligations	0.0			0.0
Deferred credits and other liabilities	0.0			0.0
Total liabilities	0.0			0.0
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	(0.1)			(0.1)
Treasury Stock	0.0			0.0
Additional paid in capital (APIC)	(1,368.4)			(1,368.4)
Retained earnings	(1,319.7)			(1,212.9)
Total stockholders' equity	(2,688.2)			(2,581.4)
Total liabilities and stockholders' equity	(2,688.2)			(2,581.4)
Parent Company \| Reportable Legal Entities
Current assets
Cash and cash equivalents	0.0			0.0	0.0			0.0
Accounts receivable—trade, less allowance for doubtful accounts	0.0			0.0
Inventories, at lower of cost or market	0.0			0.0
Prepaid expenses and other current assets	0.0			0.0
Total current assets	0.0			0.0
Property, plant and equipment, at cost less accumulated depreciation and amortization	0.0			0.0
Investments in subsidiaries	2,544.2			2,437.0
Other assets	0.0			0.0
Total assets	2,544.2			2,437.0
Current liabilities
Current maturities of long-term debt	0.0			0.0
Inter-company accounts payable	139.0			(0.1)
Trade accounts payable and accrued liabilities	0.0			0.0
Total current liabilities	139.0			(0.1)
Long-term debt, including capitalized lease obligations	0.0			0.0
Deferred income taxes	0.0			0.0
Asset retirement obligations	0.0			0.0
Deferred credits and other liabilities	0.0			0.0
Total liabilities	139.0			(0.1)
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	0.5			0.5
Treasury Stock	(1,073.2)			(940.3)
Additional paid in capital (APIC)	1,188.9			1,195.1
Retained earnings	2,289.0			2,181.8
Total stockholders' equity	2,405.2			2,437.1
Total liabilities and stockholders' equity	2,544.2			2,437.0
Issuer \| Reportable Legal Entities
Current assets
Cash and cash equivalents	246.9			184.0	74.7			169.9
Accounts receivable—trade, less allowance for doubtful accounts	164.4			138.8
Inventories, at lower of cost or market	233.8			221.5
Prepaid expenses and other current assets	18.9			25.1
Total current assets	664.0			569.4
Property, plant and equipment, at cost less accumulated depreciation and amortization	1,782.6			1,745.9
Investments in subsidiaries	144.0			144.4
Other assets	162.5			42.5
Total assets	2,753.1			2,502.2
Current liabilities
Current maturities of long-term debt	21.3			21.2
Inter-company accounts payable	58.9			203.0
Trade accounts payable and accrued liabilities	495.6			456.9
Total current liabilities	575.8			681.1
Long-term debt, including capitalized lease obligations	966.4			842.1
Deferred income taxes	199.0			192.2
Asset retirement obligations	32.3			30.7
Deferred credits and other liabilities	123.1			10.4
Total liabilities	1,896.6			1,756.5
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	0.0			0.0
Treasury Stock	0.0			0.0
Additional paid in capital (APIC)	576.4			572.8
Retained earnings	280.1			172.9
Total stockholders' equity	856.5			745.7
Total liabilities and stockholders' equity	2,753.1			2,502.2
Guarantor Subsidiaries \| Reportable Legal Entities
Current assets
Cash and cash equivalents	0.8			0.5	0.7			0.1
Accounts receivable—trade, less allowance for doubtful accounts	(0.1)			0.0
Inventories, at lower of cost or market	0.0			0.0
Prepaid expenses and other current assets	0.2			0.2
Total current assets	0.9			0.7
Property, plant and equipment, at cost less accumulated depreciation and amortization	6.7			2.3
Investments in subsidiaries	0.0			0.0
Other assets	0.0			0.0
Total assets	7.6			3.0
Current liabilities
Current maturities of long-term debt	0.0			0.0
Inter-company accounts payable	(43.6)			(48.6)
Trade accounts payable and accrued liabilities	0.0			0.0
Total current liabilities	(43.6)			(48.6)
Long-term debt, including capitalized lease obligations	0.0			0.0
Deferred income taxes	0.0			0.0
Asset retirement obligations	0.0			0.0
Deferred credits and other liabilities	0.0			0.0
Total liabilities	(43.6)			(48.6)
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	0.1			0.1
Treasury Stock	0.0			0.0
Additional paid in capital (APIC)	52.0			52.0
Retained earnings	(0.9)			(0.5)
Total stockholders' equity	51.2			51.6
Total liabilities and stockholders' equity	7.6			3.0
Non-Guarantor Subsidiaries \| Reportable Legal Entities
Current assets
Cash and cash equivalents	0.0			0.0	$ 0.0			$ 0.0
Accounts receivable—trade, less allowance for doubtful accounts	0.0			0.0
Inventories, at lower of cost or market	0.0			0.0
Prepaid expenses and other current assets	0.0			0.0
Total current assets	0.0			0.0
Property, plant and equipment, at cost less accumulated depreciation and amortization	0.0			0.0
Investments in subsidiaries	0.0			0.0
Other assets	0.0			0.0
Total assets	0.0			0.0
Current liabilities
Current maturities of long-term debt	0.0			0.0
Inter-company accounts payable	(154.3)			(154.3)
Trade accounts payable and accrued liabilities	0.0			0.0
Total current liabilities	(154.3)			(154.3)
Long-term debt, including capitalized lease obligations	0.0			0.0
Deferred income taxes	0.0			0.0
Asset retirement obligations	0.0			0.0
Deferred credits and other liabilities	0.0			0.0
Total liabilities	(154.3)			(154.3)
Stockholders' Equity
Preferred Stock	0.0			0.0
Common Stock	0.0			0.0
Treasury Stock	0.0			0.0
Additional paid in capital (APIC)	87.5			87.5
Retained earnings	66.8			66.8
Total stockholders' equity	154.3			154.3
Total liabilities and stockholders' equity	$ 0.0			$ 0.0

Guarantor Subsidiaries (Consolidating Balance Sheet 2) (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Mar. 31, 2013
Guarantor Subsidiaries [Abstract]
Allowance for doubtful accounts	$ 1.2	$ 1.1
Property, plant and equipment, accumulated depreciation and amortization	$ 1,074.8	$ 974.2
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	20,000,000	20,000,000
Preferred stock shares outstanding (in shares)	0	0
Common stock par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	200,000,000	200,000,000
Common stock shares issued (in shares)	46,767,164	46,767,164
Treasury stock, shares held (in shares)	16,007,513	14,505,681

Guarantor Subsidiaries (Consolidating Income Statement) (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Sep. 30, 2019

Sep. 30, 2018

Dec. 31, 2018

$ 3,657.6

$ 3,788.0

$ 10,574.4

$ 10,861.2

37.6

34.2

113.8

99.0

36.0

32.6

105.7

102.3

0.6

0.5

1.6

1.5

$ 2.0

3,537.1

3,717.5

10,379.6

10,698.8

0.0

0.1

50.4

0.2

(0.5)

0.1

(0.7)

120.7

70.0

195.0

212.1

0.8

0.2

2.4

0.8

(15.3)

(13.2)

(42.1)

(39.6)

(14.8)

0.0

(14.8)

0.0

(0.1)

0.0

0.1

(29.4)

(13.0)

(54.5)

(38.7)

91.3

57.0

140.5

173.4

22.1

12.0

33.3

37.3

69.2

45.0

107.2

136.1

0.0

69.2

$ 32.7

$ 5.3

45.0

$ 51.8

$ 39.3

107.2

136.1

Eliminations

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

(69.1)

(45.0)

(106.8)

(136.0)

Parent Company | Reportable Legal Entities

(69.1)

(45.0)

(106.8)

(136.0)

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

69.2

45.0

107.2

136.1

Issuer | Reportable Legal Entities

69.2

45.0

107.2

136.1

3,657.6

3,788.0

10,574.4

10,861.2

37.6

34.2

113.8

99.0

36.0

32.6

105.7

102.3

0.6

0.5

1.6

1.5

3,537.1

3,717.5

10,379.6

10,698.8

0.0

0.1

50.4

0.2

(0.5)

0.1

(0.7)

120.7

70.0

195.0

212.1

0.8

0.2

2.4

0.8

(15.3)

(13.2)

(42.1)

(39.6)

(14.8)

0.0

0.5

0.2

(29.3)

(13.0)

(54.0)

(38.6)

91.4

57.0

141.0

173.5

22.1

12.0

33.4

37.3

69.3

45.0

107.6

136.2

(0.1)

0.0

(0.4)

(0.1)

Guarantor Subsidiaries | Reportable Legal Entities

69.2

45.0

107.2

136.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

(0.1)

0.0

(0.5)

(0.1)

(0.1)

0.0

(0.5)

(0.1)

(0.1)

0.0

(0.5)

(0.1)

0.0

(0.1)

0.0

(0.1)

0.0

(0.4)

(0.1)

0.0

Non-Guarantor Subsidiaries | Reportable Legal Entities

(0.1)

0.0

(0.4)

(0.1)

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Product

^[1]

2,965.5

3,151.5

8,595.0

8,982.8

^[1]

2,749.6

2,991.3

8,104.8

8,584.9

Product | Eliminations

0.0

Product | Parent Company | Reportable Legal Entities

0.0

0.0

Product | Issuer | Reportable Legal Entities

0.0

2,965.5

3,151.5

8,595.0

8,982.8

Product | Guarantor Subsidiaries | Reportable Legal Entities

2,749.6

2,991.3

8,104.8

8,584.9

0.0

Product | Non-Guarantor Subsidiaries | Reportable Legal Entities

0.0

0.0

0.0

Merchandise sales

681.1

623.7

1,946.1

1,807.5

Merchandise sales | Eliminations

569.9

519.2

1,631.9

1,509.2

0.0

Merchandise sales | Parent Company | Reportable Legal Entities

0.0

0.0

Merchandise sales | Issuer | Reportable Legal Entities

0.0

681.1

623.7

1,946.1

1,807.5

Merchandise sales | Guarantor Subsidiaries | Reportable Legal Entities

569.9

519.2

1,631.9

1,509.2

0.0

Merchandise sales | Non-Guarantor Subsidiaries | Reportable Legal Entities

0.0

0.0

0.0

Other operating revenues

11.0

12.8

33.3

70.9

Other operating revenues | Eliminations

143.4

139.7

421.8

401.9

0.0

Other operating revenues | Parent Company | Reportable Legal Entities

0.0

0.0

Other operating revenues | Issuer | Reportable Legal Entities

0.0

11.0

12.8

33.3

70.9

Other operating revenues | Guarantor Subsidiaries | Reportable Legal Entities

143.4

139.7

421.8

401.9

0.0

Other operating revenues | Non-Guarantor Subsidiaries | Reportable Legal Entities

0.0

0.0