Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net income attributable to common shareholders	$ 43.2	$ 43.7	$ 48.8	$ 49.5	$ 86.9	$ 98.3