Borrowed Funds - Narrative (Details) - USD ($) $ in Millions	Apr. 15, 2025	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument
FHLB lockout period		6 months
FHLB available capacity		$ 5,800	$ 6,600
Interest payable		$ 49	51
FHLB advance, maturity period		5 years
Subordinated notes		$ 445	444
Subsequent Event
Debt Instrument
FHLB lockout period	12 months
As Initially Reported
Debt Instrument
Junior subordinated debentures		$ 610	$ 610