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Fair Value Disclosures - Measured on a Nonrecurring Basis (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans and leases measured at fair value on a nonrecurring basis still held	$ 516		$ 599
LHFS | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value, LHFS	204		4
Valuation adjustments	(58)	$ (68)
Loans and leases | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value, loans and leases	297		468
Valuation adjustments	(444)	(420)
Other | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value, other	46		$ 65
Valuation adjustments	$ (113)	$ (148)

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