Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (649)	$ 92	$ (209)	$ (155)
Other comprehensive income (loss) before reclassifications			(63)	(15)
Amounts reclassified from accumulated other comprehensive income			11	26
Net current-period other comprehensive income (loss)	(55)	(15)	(52)	11
Ending balance	(507)	(198)	(507)	(198)
Foreign Exchange Contracts | Derivatives designated as hedging instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivatives used in net investment hedge, net of tax	174		174
Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			16	40
Other comprehensive income (loss) before reclassifications			(121)	(33)
Amounts reclassified from accumulated other comprehensive income			0	11
Net current-period other comprehensive income (loss)			(121)	(22)
Ending balance	(105)	18	(105)	18
Net Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(19)	(51)
Other comprehensive income (loss) before reclassifications			57	17
Amounts reclassified from accumulated other comprehensive income			8	10
Net current-period other comprehensive income (loss)			65	27
Ending balance	46	(24)	46	(24)
Net Unrealized Gains (Losses) on Cash Flow Hedges | Corporate Interest Expense
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	1	3	8	9
Amounts reclassified from accumulated other comprehensive income (loss)	1	4	10	12
Net Unrealized Gains (Losses) on Cash Flow Hedges | Vehicle Interest Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income		1	1	1
Amounts reclassified from accumulated other comprehensive income (loss)		1	2	2
Minimum Pension Liability Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(130)	(176)
Other comprehensive income (loss) before reclassifications			1	1
Amounts reclassified from accumulated other comprehensive income			3	5
Net current-period other comprehensive income (loss)			4	6
Ending balance	(126)	(170)	(126)	(170)
Minimum Pension Liability Adjustment | Selling, general and administrative expenses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	1	2	3	5
Amounts reclassified from accumulated other comprehensive income (loss)	1	2	4	7
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(133)	(187)
Ending balance	$ (185)	$ (176)	$ (185)	$ (176)