Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 13,598	$ 12,726	$ 11,659
Balance at end of period	13,794	13,598	12,726
Accumulated Other Comprehensive Loss
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(1,309)	(1,119)	(1,066)
Balance at end of period	(1,273)	(1,309)	(1,119)
Unrealized gain (loss) on hedges
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(157)	(49)	9
Other comprehensive (loss) income, net of tax	80	(108)	(58)
Balance at end of period	(77)	(157)	(49)
Defined benefit plans
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	1	1	1
Unrealized gain (loss) on subsidiary pension, net of tax	0	0	0
Balance at end of period	1	1	1
Foreign currency translation adjustment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(1,153)	(1,071)	(1,076)
Other comprehensive (loss) income, net of tax	(44)	(82)
Balance at end of period	$ (1,197)	$ (1,153)	$ (1,071)