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Stockholders' Equity - Schedule of Amounts Reclassified from AOCL (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated other comprehensive income (loss)
Reclassification from AOCL, net of tax	$ (98.6)	$ (8.2)	$ 6.2
Investment Securities
Accumulated other comprehensive income (loss)
Reclassification from AOCL, Provision for income taxes	(0.8)	(0.1)	(0.1)
Reclassification from AOCL, net of tax	2.9	0.5	0.5
Investment Securities | Revenues
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	3.7	0.6	0.6
Hedging Activities
Accumulated other comprehensive income (loss)
Reclassification from AOCL, Provision for income taxes		0.1	(0.1)
Reclassification from AOCL, net of tax	(7.5)	0.7	14.1
Hedging Activities | Foreign currency contracts | Revenues
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	7.6	1.2	14.2
Hedging Activities | Interest rate contracts | Interest Expense
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	(0.6)	(0.6)
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	25.7	2.7	2.4
Reclassification from AOCL, net of tax	(94.0)	(9.4)	(8.4)
Defined benefit plans | Other Income/(Expense), net
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	(9.9)	$ (12.1)	$ (10.8)
Defined benefit plans | Pension Settlement Charges
Accumulated other comprehensive income (loss)
Reclassification from AOCL, before tax	$ (109.8)

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