CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Debt securities available for sale, amortized cost	$ 3,519,000,000	$ 3,622,000,000
Debt securities available for sale, allowance for credit losses	0	0
Debt securities held-to-maturity, fair value	3,587,000,000	3,687,000,000
Debt securities held to maturity, allowance for credit losses	320,000	230,000
Loans held for sale, fair value	82,000,000	91,000,000	[1]
Loans and leases, unearned income	86,000,000	69,000,000
Loans and leases, unearned income fair value	$ 34,000,000	$ 12,000,000
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference per share (USD per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	110,877	110,877
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	374,935,404	374,907,245
Treasury stock, shares (in shares)	16,114,836	14,437,135

[1] Amount represents loans for which we have elected the fair value option. See Note 19.