Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Pledged investment securities	$ 825	$ 434
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	515,000	515,000
Preferred stock, shares outstanding (in shares)	515,000	515,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	744,461,392	705,429,386
Common stock, shares outstanding (in shares)	722,150,297	681,217,334
Treasury stock (in shares)	22,311,095	24,212,052
AOCI, Debt Securities, Available-for-Sale, Adjustment, Tax	$ 219	$ 240
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Tax	17	18
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), Tax	$ 5	$ (20)