Federal, State, and Local Taxes - Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Statutory federal income tax at 21%	$ (289)	$ (10)	$ 174
State and local income taxes, net of federal income tax effect	(39)	8	31
Non-deductible FDIC deposit insurance premiums	66	16	10
Non-taxable or deductible bargain gain	25	(447)	(33)
Other, net	5	2	5
Effect of tax deductibility of deferred compensation	3	(3)	(3)
Tax exempt income	(8)	(6)	0
Non-taxable expense of bank-owned life insurance	(9)	(9)	(7)
Federal tax credits	(14)	(31)	(1)
Non-deductible goodwill impairment	0	509	0
Income tax expense reported in net income	$ (260)	$ 29	$ 176