Derivative Instruments - Change in Unrealized Gains (Losses) in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 39,781	$ 1,098	$ 2,107	$ 571
Change in fair value, net of tax			25
Reclassification into earnings, net of tax			5
Ending Balance	39,506	1,331	39,506	1,331
Cash Flow Hedges | Foreign exchange forward contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	1	14	6	14
Change in fair value, net of tax	(11)	3	(14)	8
Reclassification into earnings, net of tax	1	(5)	(1)	(10)
Ending Balance	(9)	12	(9)	12
Cash Flow Hedges | Interest rate swap contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(118)	2	(203)	0
Change in fair value, net of tax	101	(157)	185	(155)
Reclassification into earnings, net of tax	1	0	2	0
Ending Balance	(16)	(155)	(16)	(155)
Net Investment Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(2)	(70)	(17)	(81)
Change in fair value, net of tax	63	8	77	19
Reclassification into earnings, net of tax	1	3	2	3
Ending Balance	$ 62	$ (59)	$ 62	$ (59)