Derivative Instruments - Change in Unrealized Gains (Losses) in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 36,477	$ 2,107
Change in fair value, net of tax	24
Reclassification into earnings, net of tax	1
Ending Balance	36,370	39,781
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	0	6
Change in fair value, net of tax	4	(3)
Reclassification into earnings, net of tax	0	(2)
Ending Balance	4	1
Interest rate swap contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	48	(203)
Change in fair value, net of tax	(26)	85
Reclassification into earnings, net of tax	1	0
Ending Balance	23	(118)
Net Investment Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	56	(17)
Change in fair value, net of tax	(8)	14
Reclassification into earnings, net of tax	1	1
Ending Balance	$ 49	$ (2)