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Fair Value Measurements - Change in Balance Sheet Carrying Value Associated with Level 3 Financial Instruments Carried at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	$ (282)	$ (114)	$ (194)	$ (302)
Total gains/(losses):
Included in earnings	(140)	(52)	(243)	122
Included in other comprehensive income	0	0	0	0
Settlements	13	5	28	19
Transfers in and/or out of level 3	0	0	0	0
Balance, end of period	(409)	(161)	(409)	(161)
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date	(127)	(47)	(216)	(120)
Interest Rate Swaps [Member]
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	(3)	(6)	(4)	(8)
Total gains/(losses):
Included in earnings	1	1	1	2
Included in other comprehensive income	0	0	0	0
Settlements	0		1	1
Transfers in and/or out of level 3	0	0	0	0
Balance, end of period	(2)	(5)	(2)	(5)
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date	1	1	1	2
Cross-Currency Interest Rate Swaps [Member]
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	(279)	(108)	(190)	(294)
Total gains/(losses):
Included in earnings	(141)	(53)	(244)	120
Included in other comprehensive income	0	0	0	0
Settlements	13	5	27	18
Transfers in and/or out of level 3	0	0	0	0
Balance, end of period	(407)	(156)	(407)	(156)
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date	(128)	(48)	(217)	(122)
Other [Member]
Total gains/(losses):
Included in earnings	0		0
Included in other comprehensive income	0	0	0	0
Settlements	0		0
Transfers in and/or out of level 3	0	$ 0	0	$ 0
Balance, end of period	0		0
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date	$ 0		$ 0

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- Definition

Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date.

+ References

No definition available.

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- Definition

Fair value net derivative asset (liability) measured on recurring basis unobservable input reconciliation gains (losses).

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- Definition

Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 820
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- Definition

Amount of gain (loss) recognized in other comprehensive income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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Amount of settlements of financial instrument classified as a derivative asset (liability) after deduction of derivative liability, measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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- Definition

Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into (out of) level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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