Consolidated Statement of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock option exercises/deferred stock unit conversions, shares	987,758	408,563	399,224
Stock Redeemed or Called During Period, Shares		6,000,000
Stock Issued During Period, Shares, New Issues		150,000
Treasury Stock, Shares, Acquired	31,317	206,951	716,062
Stock Issued During Period, Shares, Treasury Stock Reissued	18,555	140,264
Preferred Stock, Dividends Per Share, Declared	$ 47.71	$ 0.34	$ 1.34
Preferred stock, Dividends equivalent per depositary share, Declared	1.19
Common Stock, Dividends, Per Share, Cash Paid	$ 2.94	$ 2.85	$ 2.80