Securities - Narrative (Details)	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	541	547
Allowance for credit loss | $	$ 0	$ 0
HTM securities allowance for credit loss | $	0	0
Asset Pledged as Collateral
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
AFS and HTM debt securities carrying value | $	$ 5,400,000,000	$ 7,000,000,000.0
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	290	255
Non-agency mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	83	99
Corporate debt securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	66	66