Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income	$ 419.2	$ 666.6	$ 666.4	$ 580.3	$ 546.2	$ 507.2	$ 1,752.2	$ 1,633.7