Components of Other Comprehensive Income (Loss) - Schedule of Reclassification from AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized (gains) losses on cash flow hedges	$ (2,292)	$ (1,957)	$ (1,722)
Amortization of prior service cost and net actuarial (gain) loss	(218)	(193)	(141)
Income tax expense	(247)	(274)	(76)
Total reclassification from AOCI	912	1,010	857
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total reclassification from AOCI	23	1	7
Reclassification out of Accumulated Other Comprehensive Income | Securities AFS
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized (gains) losses on securities AFS	0	0	4
Income tax expense	0	0	(1)
Total reclassification from AOCI	0	0	3
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized (gains) losses on cash flow hedges	20	(9)	(8)
Income tax expense	(5)	2	2
Total reclassification from AOCI	15	(7)	(6)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Post-retirement Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of prior service cost and net actuarial (gain) loss	10	10	13
Income tax expense	(2)	(2)	(3)
Total reclassification from AOCI	$ 8	$ 8	$ 10