Stock-Based Incentive Compensation Plans (Summary of activity for performance shares) (Details) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Shares:
Outstanding as of beginning of year (in shares) | shares	542,708
Granted (in shares) | shares	315,076
Vested (in shares) | shares	(18,228)
Forfeited (in shares) | shares	(81,763)
Performance Adjustment | shares	(127,123)
Outstanding as of end of year (in shares) | shares	630,670
Weighted-Average Grant Date Fair Value
Weighted-average grant date fair value, outstanding as of beginning of year (in dollars per share) | $ / shares	$ 71.61
Weighted-average grant date fair value, granted (in dollars per share) | $ / shares	59.53
Weighted-average grant date fair value, vested (in dollars per share) | $ / shares	89.88
Weighted-average grant date fair value, forfeited (in dollars per share) | $ / shares	62.76
Weighted-average grant date fair value, performance adjustment (in dollars per share) | $ / shares	89.93
Weighted-average grant date fair value, outstanding as of end of year (in dollars per share) | $ / shares	$ 63.16