Units Of Gasoline

No definition available.

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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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.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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Financial Instruments (Narrative) (Detail) gal in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) gal	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) gal	Jun. 30, 2018 USD ($)
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 13	$ (56)	$ 1	$ (40)
Interest Rate Caps [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	8,398		8,398
Interest Rate Caps [Member] \| Subsidiaries [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	3,000		3,000
Interest Rate Swaps [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	1,500		1,500
Currency Swap [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	$ 1,393		$ 1,393
Commodity Contracts [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Units Of Gasoline \| gal	9		9
Purchase [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	$ 2,700		$ 2,700
Sold [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Absolute notional values of derivative instruments	5,700		5,700
Not Designated As Hedging Instruments [Member] \| Commodity Contracts [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Derivative Instruments, Gain (Loss) Recognized in Income, Net	(1)	(1)	(4)	(1)
Interest Expense [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Derivative Instruments, Gain (Loss) Recognized in Income, Net	15	(20)	(11)	$ 7
Operating Expense [Member]
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31)
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ (5)	$ 8	$ 12