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Stockholders' Equity - Schedule of Amounts Reclassified from AOCL (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated other comprehensive income (loss)
Reclassification from AOCL, net of tax	$ 10.5			$ (0.9)			$ 43.0	$ (15.0)
Investment Securities
Accumulated other comprehensive income (loss)
Reclassification from AOCL, Provision for income taxes	1.6			(0.5)			1.6	(0.5)
Reclassification from AOCL, net of tax	(6.8)		$ (0.1)	2.0	$ (0.1)	$ (0.1)	(6.9)	1.8
Investment Securities | Revenues
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	(8.4)			(2.5)			(8.5)	(2.3)
Hedging Activities
Accumulated other comprehensive income (loss)
Reclassification from AOCL, Provision for income taxes	(0.2)			0.1			(0.2)	0.1
Reclassification from AOCL, net of tax	17.3	$ 13.9	0.9	(0.6)	(3.5)	(5.6)	32.1	(9.7)
Hedging Activities | Foreign currency contracts | Revenues
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	$ 17.5			(0.6)			32.4	(10.0)
Hedging Activities | Interest rate contracts | Interest Expense
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax				(0.1)			(0.1)	(0.5)
Hedging Activities | Interest rate contracts | Other income/(expense), net
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax								0.7
Defined benefit plans
Accumulated other comprehensive income (loss)
Reclassification from AOCL, Provision for income taxes				0.7				2.0
Reclassification from AOCL, net of tax				(2.3)	$ (2.3)	$ (2.5)		(7.1)
Defined benefit plans | Other income/(expense), net
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax				$ (3.0)				$ (9.1)
Foreign Currency Translation
Accumulated other comprehensive income (loss)
Reclassification from AOCL, net of tax			$ 17.8				17.8
Foreign Currency Translation | Gain on Divestiture of Business Member
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax							$ 17.8

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