Stockholders' Equity (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (508)	$ (441)	$ (343)	$ (700)
Other comprehensive income (loss) before reclassifications			(30)	15
Amounts reclassified from accumulated other comprehensive income (loss)			(9)	(4)
Net current-period other comprehensive income (loss)	5	21	(39)	11
Ending balance	(482)	(125)	(482)	(125)
Amounts reclassified from accumulated other comprehensive income (loss)			(9)	(4)
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	116		116
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(96)	(101)
Ending balance	(135)	(90)	(135)	(90)
Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(3)	(30)
Other comprehensive income (loss) before reclassifications			(45)	2
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Net current-period other comprehensive income (loss)			(45)	2
Ending balance	(48)	(28)	(48)	(28)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Net Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			37	45
Other comprehensive income (loss) before reclassifications			15	13
Amounts reclassified from accumulated other comprehensive income (loss)			(11)	(6)
Net current-period other comprehensive income (loss)			4	7
Ending balance	41	52	41	52
Amounts reclassified from accumulated other comprehensive income (loss)			(11)	(6)
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 (loss)	(6)	(4)	(11)	(6)
Amounts reclassified from accumulated other comprehensive income (loss)	(7)	(5)	(14)	(8)
Amounts reclassified from accumulated other comprehensive income (loss)	(6)	(4)	(11)	(6)
Minimum Pension Liability Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(130)	(116)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			2	2
Net current-period other comprehensive income (loss)			2	2
Ending balance	(128)	(114)	(128)	(114)
Amounts reclassified from accumulated other comprehensive income (loss)			2	2
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 (loss)	1	1	2	2
Amounts reclassified from accumulated other comprehensive income (loss)	2	2	3	3
Amounts reclassified from accumulated other comprehensive income (loss)	$ 1	$ 1	$ 2	$ 2