Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Mortgages Held-for-sale, Fair Value Disclosure	$ 3,901,000	$ 5,570,000
Debt Securities, Available-for-sale, Amortized Cost	15,425,954,000	14,419,133,000
Allowance for Credit Losses	$ 0	$ 0
Common stock, par value	$ 5	$ 5
Common Stock, Shares Authorized	140,000,000	140,000,000
Common stock, shares issued	122,160,705	122,160,705
Treasury stock, shares	1,034,382	476,392