Stockholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		164 Months Ended
	Jul. 14, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Foreign currency translation gain (loss), gross amount		$ (6)	$ (10)	$ 3	$ (10)
Foreign currency translation gain (loss), income tax (provision) benefit		(9)	7	(15)	(1)
Foreign currency translation gain (loss), net		(15)	(3)	(12)	(11)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(15)	5	16	(33)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax		16	1	25	(11)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax		1	6	41	(44)
Other Comprehensive Income (Loss), before Tax		(5)	(4)	40	(54)
Income tax (provision) benefit		(25)	6	(40)	10
Total other comprehensive income (loss), net of tax		(30)	2	0	(44)
Pension and postretirement benefits gain (loss), gross amount				(4)	0
Pension and postretirement benefits gain (loss), income tax (provision) benefit				0	0
Pension and postretirement benefits gain (loss), net		0	0	(4)	0
Other Comprehensive Income (Loss), before Tax		(5)	(4)	40	(54)
Income tax (provision) benefit		(25)	6	(40)	10
Total other comprehensive income (loss), net of tax		$ (30)	$ 2	0	(44)
Aggregate Board of Directors repurchase authorizations (in $ millions)	$ 1,000			$ 1,000	$ 500	$ 6,866