Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 15,004	$ 13,800	$ 13,794	$ 13,598
Balance at end of period	14,844	14,465	14,844	14,465
Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(1,034)	(1,332)	(1,273)	(1,309)
Balance at end of period	(1,226)	(1,206)	(1,226)	(1,206)
Unrealized gain (loss) on hedges
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	19	(108)	(77)	(157)
Other comprehensive income (loss), net of tax	21	(7)	116	42
Balance at end of period	39	(115)	39	(115)
Defined benefit plans
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	0	1	1	1
Other comprehensive income (loss), net of tax	0	0	0	0
Balance at end of period	0	1	0	1
Foreign currency translation adjustment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(1,053)	(1,225)	(1,197)	(1,153)
Other comprehensive income (loss), net of tax	(213)	133	(69)	61
Balance at end of period	$ (1,266)	$ (1,092)	$ (1,266)	$ (1,092)