Employee Benefit Plans (Performance Shares Activity) (Details) - Performance Share Units (PSUs) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of PSUs (in thousands)
Beginning balance (in shares)	853,600	919,200	999,700
Granted (in shares)	313,100	247,000.0	356,100
Vested and issued (in shares)	(287,000.0)	(285,000.0)	(407,300)
Forfeited (in shares)	(22,400)	(27,600)	(29,300)
Beginning balance (in shares)	857,300	853,600	919,200
Weighted-Average Grant Date Fair Value per Share
Beginning balance (in dollars per share)	$ 76.14	$ 65.92	$ 55.77
Granted (in dollars per share)	91.01	98.01	71.22
Vested and Issued (in dollars per share)	65.35	61.22	47.11
Forfeited (in dollars per share)	91.20	88.29	67.77
Ending balance (in dollars per share)	$ 84.79	$ 76.14	$ 65.92