Commitments and Contingencies - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
CRE
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 9,731	$ 9,985
Other consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	2,388	2,022
Residential mortgage
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	138	146
Commitments to extend, originate, or purchase credit and other commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	221,244	210,645
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 8,399	$ 7,532