Segment Information - Reconciliation of Adjusted Operating Income to Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Adjusted operating income	$ 275.9	$ 272.3	$ 528.4	$ 496.2
Stock-based compensation			61.2	48.6
Operating income	159.4	171.1	313.7	293.4
Financing interest expense	(42.4)	(31.8)	(80.8)	(61.5)
Net foreign currency loss	(0.2)	(19.4)	(1.6)	(14.4)
Change in fair value of contingent consideration	(1.2)	(88.2)	(3.0)	(104.8)
Net unrealized gain (loss) on financial instruments	2.2	16.9	(12.3)	66.7
Income before income taxes	117.8	48.6	216.0	179.4
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated corporate expenses	25.3	19.0	47.7	40.0
Acquisition-related intangible amortization	44.3	42.5	88.4	85.3
Other acquisition and divestiture related items	1.4	6.5	2.5	11.0
Stock-based compensation	36.5	25.3	62.6	50.5
Other costs	9.0	7.9	13.5	16.1
Mobility
Segment Reporting Information [Line Items]
Adjusted operating income	150.3	193.0	289.1	353.1
Corporate Payments
Segment Reporting Information [Line Items]
Adjusted operating income	66.3	51.0	115.5	79.3
Benefits
Segment Reporting Information [Line Items]
Adjusted operating income	$ 59.3	$ 28.3	$ 123.8	$ 63.8