CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 1,092	$ 1,083
Loans held for sale, fair value	$ 114	$ 85
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	16,750	16,750
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, authorized (in shares)	700,000,000	700,000,000
Common stock, issued (in shares)	507,315,184	524,280,412