Financial Derivatives (Gains (Losses) Recognized on Fair Value and Cash Flow Hedges in the Consolidated Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Loans	$ 4,986	$ 4,609	$ 9,778	$ 9,081
Investment Securities	1,263	1,151	2,465	2,275
Borrowed Funds	905	870	1,653	1,716
Total other income	489	212	614	349
Other amounts related to interest settlements on derivatives	3	(3)	0	2
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Derivative Instruments, Gain (Loss) [Line Items]
Hedged items	(194)	182	(337)	511
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Derivative Instruments, Gain (Loss) [Line Items]
Amount of derivative gains (losses) reclassified from accumulated other comprehensive income	(8)	(9)	(14)	(16)
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Derivative Instruments, Gain (Loss) [Line Items]
Amount of derivative gains (losses) reclassified from accumulated other comprehensive income	(44)	(177)	(95)	(366)
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Derivative Instruments, Gain (Loss) [Line Items]
Hedged items	313	(318)	513	(876)
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Derivative Instruments, Gain (Loss) [Line Items]
Amount of derivative gains (losses) reclassified from accumulated other comprehensive income	(15)	0	(15)	2
Fair value hedges \| Designated as Hedging Instrument \| Income Statement Location [Axis]: us-gaap:InterestAndDividendIncomeSecurities
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	195	(180)	335	(509)
Amounts related to interest settlements on derivatives	(8)	25	(11)	49
Fair value hedges \| Designated as Hedging Instrument \| Income Statement Location [Axis]: us-gaap:InterestExpenseBorrowings
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	(314)	319	(512)	881
Amounts related to interest settlements on derivatives	$ (28)	$ (99)	$ (64)	$ (195)

Interest Settlements on Derivatives

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The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

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