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Goodwill and Other Intangible Assets (Intangible Assets) - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 1,430	$ 1,430
Goodwill, Impairment Loss		387
Customer Relations And Supply Agreements [Member] | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	11 years
Favorable leasehold arrangements, net [Member] | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	14 years
Noncompete Agreements | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	13 years
Deferred Loan Origination Costs | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	2 years
Retail Segment [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 678
Goodwill, Impairment Loss		(102)
Liquor Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		4
Contractual Rights [Member]
Finite Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 13

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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