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Derivatives - Gains/(Losses) from Hedging Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gains/(Losses) from Derivatives
Revenues	$ 5,070.8	$ 4,835.0	$ 5,292.1
Interest expense	(105.5)	(118.5)	(152.0)
Other income/(expense), net	(21.7)	3.1	8.5
Fair Value Hedges | Interest rate contracts | Interest Expense
Cash Flow and Fair Value Hedges
Derivatives designated as hedging instruments			(0.1)
Fair Value Hedges | Designated as hedges | Interest rate contracts | Interest Expense
Cash Flow and Fair Value Hedges
Derivatives designated as hedging instruments			1.0
Cash Flow Hedges | Foreign currency contracts | Revenues
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings	(7.6)	1.2	14.2
Amount excluded from effectiveness testing recognized in earnings based on an amortization approach	6.1	10.4	11.5
Amount excluded from effectiveness testing recognized in earnings based on changes in fair value			$ 2.9
Cash Flow Hedges | Interest rate contracts | Interest Expense
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings	(0.6)	$ (0.6)
Cash Flow Hedges | Interest rate contracts | Other Operating Income (Expense) [Member]
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings	$ 0.7

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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