Earnings Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 22.8	$ 23.1	$ 150.6	$ 137.1
Weighted average shares - Basic (in shares)	69.0	66.6	68.6	66.3
Dilutive effect of equity compensation	0.0	0.1	0.1	0.1
Weighted average shares - diluted (in shares)	69.0	66.7	68.7	66.4
Net income available for common stock, per share - Diluted	$ 0.33	$ 0.35	$ 2.19	$ 2.06