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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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Amount of asset hedged in fair value hedging relationship.

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Derivative Instruments and Hedging Activities - Gains (Losses) on Accounting Hedges and Fair Value Hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash flow hedges - Interest rate contracts
Recognized in OCI	$ (13)	$ (25)	$ (60)	$ (18)
Less: Realized gains (losses) (pre-tax) reclassified from AOCI to interest income	(12)	(2)	(23)	(3)
Net change in cash flow hedges included within AOCI	(1)	(23)	(37)	(15)
Cash flow hedges expected to be reclassified from AOCI			$ (56)
Maximum length of time over which forecasted cash flows are hedged			18 months
Investment securities—AFS
Fair Value Hedges - Hedged Items
Amortized cost basis currently/ carrying amount currently or previously hedged	50,820		$ 50,820		$ 47,179
Basis adjustments included in carrying amount	(1,082)		(1,082)		(732)
Deposits
Fair Value Hedges - Hedged Items
Amortized cost basis currently/ carrying amount currently or previously hedged	17,645		17,645		10,569
Basis adjustments included in carrying amount	(23)		(23)		(31)
Borrowings
Borrowings
Carrying amount currently or previously hedged	164,105		164,105		158,659
Basis adjustments included in carrying amount—Outstanding hedges	(11,348)		(11,348)		(9,219)
Basis adjustments included in carrying amount—Terminated hedges	(660)		(660)		$ (671)
Fair Value Hedges \| Interest Income \| Interest rate
Gain (Loss) on Fair Value Hedges Recognized in Interest Expense
Gains (losses) recognized in interest expense	19	569	591	198
Fair Value Hedges \| Interest Income \| Investment securities—AFS
Gain (Loss) on Fair Value Hedges Recognized in Interest Expense
Gains (losses) recognized in interest expense	5	(565)	(547)	(184)
Fair Value Hedges \| Interest expense \| Interest rate
Gain (Loss) on Fair Value Hedges Recognized in Interest Expense
Gains (losses) recognized in interest expense	(24)	(2,349)	(2,151)	(64)
Fair Value Hedges \| Interest expense \| Deposits
Gain (Loss) on Fair Value Hedges Recognized in Interest Expense
Gains (losses) recognized in interest expense	(18)	38	(8)	(16)
Fair Value Hedges \| Interest expense \| Borrowings
Gain (Loss) on Fair Value Hedges Recognized in Interest Expense
Gains (losses) recognized in interest expense	49	2,316	2,158	75
Net Investment Hedges \| Foreign exchange
Net investment hedges—Foreign exchange contracts
Recognized in OCI	285	95	655	6
Forward points excluded from hedge effectiveness testing—Recognized in Interest income	$ 42	$ 63	$ 90	$ 106