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Earnings Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 127.9	$ 114.1
Weighted average shares - Basic (in shares)	68.2	66.0
Dilutive effect of equity compensation	0.1	0.1
Weighted average shares - diluted (in shares)	68.3	66.1
Net income available for common stock, per share - Diluted	$ 1.87	$ 1.73

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