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Goodwill and Other Intangible Assets (Intangible Assets) - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 32
Goodwill	$ 2,612	2,618
Impairment in goodwill	$ 0	$ 642
Customer Relations And Supply Agreements [Member] | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	9 years
Favorable leasehold arrangements, net [Member] | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	11 years
Noncompete Agreements | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	12 years
Deferred Loan Origination Costs | Weighted Average [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average life	3 years

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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
-Paragraph 1
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- Definition

Amount of loss from the write-down of an asset representing the 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
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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

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