Stock-Based Incentive Compensation Plans (Summary of activity for restricted stock units) (Details) - Restricted Stock Units [Member]	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Shares:
Outstanding as of beginning of year (in shares) | shares	1,657,902
Granted (in shares) | shares	911,193
Vested (in shares) | shares	(596,467)
Forfeited (in shares) | shares	(102,072)
Outstanding as of end of year (in shares) | shares	1,870,556
Weighted-Average Grant Date Fair Value
Weighted-average grant date fair value, outstanding as of beginning of year (in dollars per share) | $ / shares	$ 66.62
Weighted-average grant date fair value, granted (in dollars per share) | $ / shares	56.91
Weighted-average grant date fair value, vested (in dollars per share) | $ / shares	75.97
Weighted-average grant date fair value, forfeited (in dollars per share) | $ / shares	59.88
Weighted-average grant date fair value, outstanding as of end of year (in dollars per share) | $ / shares	$ 59.78