Derivative Instruments - Change in Unrealized Gains (Losses) in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 2,107	$ 571
Change in fair value, net of tax	61
Reclassification into earnings, net of tax	(2)
Ending Balance	39,781	1,098
Cash Flow Hedges | Foreign exchange forward contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	6	14
Change in fair value, net of tax	(3)	5
Reclassification into earnings, net of tax	(2)	(5)
Ending Balance	1	14
Cash Flow Hedges | Interest rate swap contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(203)	0
Change in fair value, net of tax	85	2
Reclassification into earnings, net of tax	0	0
Ending Balance	(118)	2
Net Investment Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(17)	(81)
Change in fair value, net of tax	14	11
Reclassification into earnings, net of tax	1	0
Ending Balance	$ (2)	$ (70)