Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Other comprehensive income/(loss), tax (benefit) expense	$ (0.4)	$ 15.4	$ (41.3)
Reclassifications to earnings of realized gains/(losses) on available-for-sale securities	$ 0.0	$ 5.6	0.0
Net gain recorded on hedges			75.0
Net gain recorded on hedges, Net of tax			$ 23.3