Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash flow hedge gains expected to reclassified out of AOCI over next 12 months			$ 46
Balance, beginning of period, net of tax	$ 16,276	$ 11,967	16,609	$ 8,433
Balance, end of period, net of tax	15,810	14,669	15,810	14,669
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period, net of tax	62	107	83	129
Net realized (gain) loss reclassified to net income, net of tax	(10)	(12)	(31)	(34)
Balance, end of period, net of tax	$ 52	$ 95	$ 52	$ 95