Comprehensive Income - Components of AOCL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Components of Accumulated other comprehensive income, net of taxes
Beginning balance	$ 4,175.6	$ 3,710.6
Other comprehensive income before reclassifications	27.5
Amounts reclassified	(0.1)
Other comprehensive income (loss), net of tax	27.4	(11.8)
Ending balance	4,219.4	3,593.2
Total
Components of Accumulated other comprehensive income, net of taxes
Beginning balance	(297.8)
Ending balance	(270.4)
Foreign Currency Translation Adjustment
Components of Accumulated other comprehensive income, net of taxes
Beginning balance	(296.4)
Other comprehensive income before reclassifications	26.8
Amounts reclassified	0.0
Other comprehensive income (loss), net of tax	26.8	(11.8)
Ending balance	(269.6)
Realized and Unrealized Gains (Losses) on Derivative Financial Instruments
Components of Accumulated other comprehensive income, net of taxes
Beginning balance	(0.4)
Other comprehensive income before reclassifications	0.3
Amounts reclassified	(0.1)
Other comprehensive income (loss), net of tax	0.2	0.0
Ending balance	(0.2)
Change in net unrealized gain (loss) on available-for-sale debt securities
Components of Accumulated other comprehensive income, net of taxes
Beginning balance	(1.0)
Other comprehensive income before reclassifications	0.4
Amounts reclassified	0.0
Other comprehensive income (loss), net of tax	0.4	$ 0.0
Ending balance	$ (0.6)