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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net income	$ 22.9	$ 16.0	$ 23.9	$ 54.6
Less: Net income attributable to participating securities	(1.0)	(0.6)	(1.0)	(2.2)
Net income attributable to common shareholders - Basic and Dilutive	$ 21.9	$ 15.4	$ 22.9	$ 52.4
Denominators
Basic - Weighted-average shares outstanding	119.5	118.7	119.2	118.5
Basic - Less: Participating securities	(5.0)	(4.7)	(4.8)	(4.7)
Basic - Weighted-average common shares outstanding	114.5	114.0	114.4	113.8
Effect of dilutive securities - dilutive stock-based compensation	0.8	0.4	0.6	0.2
Diluted - Adjusted weighted-average shares after assumed conversions	115.3	114.4	115.0	114.0
Basic EPS	$ 0.19	$ 0.13	$ 0.20	$ 0.46
Diluted EPS	$ 0.19	$ 0.13	$ 0.20	$ 0.46

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