Earnings Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share Basic And Diluted [Line Items]
Net income available to common stockholders	$ 100.7	$ 77.4	$ 197.8	$ 44.2
Weighted average number of shares outstanding:
Basic weighted average shares outstanding (in shares)	183,887,145	181,860,026	183,473,233	151,343,397
Diluted weighted average shares outstanding (in shares)	184,912,584	182,810,399	184,746,818	152,404,830
Earnings per share available to common stockholders:
Basic (usd per share)	$ 0.55	$ 0.43	$ 1.08	$ 0.29
Diluted (usd per share)	$ 0.54	$ 0.42	$ 1.07	$ 0.29
Share units
Weighted average number of shares outstanding:
Effect of dilutive securities: Share units and Stock options and ESPP (in shares)	434,999	460,400	630,431	545,905
Stock options and ESPP
Weighted average number of shares outstanding:
Effect of dilutive securities: Share units and Stock options and ESPP (in shares)	590,440	489,973	643,154	515,528