Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 8.9	$ 5.7	$ 14.3	$ 9.8
Cumulative catch-up adjustment, net of tax	$ 2.5		$ 2.5
Basic earnings per share	$ 1.61	$ 4.83	$ 2.65	$ 9.08
Diluted earnings per share	$ 1.60	$ 4.78	$ 2.63	$ 8.97
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			200,000	200,000
Grant date fair value			$ 62.61	$ 63.77
Awards vesting period			3 years
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested			300,000	300,000
Shares granted			500,000	500,000
Grant date fair value			$ 60.05	$ 55.93
Awards vesting period			3 years
Shares will vest if defined maximum performance targets are met			1,100,000
Shares will vest if defined maximum performance targets are not met			0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			300,000	300,000
Shares increased	90,000.0
Cumulative catch-up adjustment	$ 3.4		$ 3.4
Basic earnings per share	$ 0.08		$ 0.08
Diluted earnings per share	$ 0.08		$ 0.08
Performance Share Units [Member] | Tranche One [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target range			0.00%
Performance Share Units [Member] | Tranche Two [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target range			250.00%
Non-Employee Directors [Member] | Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			11,000.0	11,000.0
Grant date fair value			$ 65.77	$ 54.46