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Derivatives - Gains/(Losses) from Hedging Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gains/(Losses) from Derivatives
Revenues	$ 4,357.0	$ 4,475.5	$ 5,070.8
Interest expense	(105.3)	(101.0)	(105.5)
Other expense, net	0.0	(37.5)	(21.7)
Cash Flow Hedges | Foreign currency contracts
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings	23.9
Cash Flow Hedges | Foreign currency contracts | Revenues
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings		47.7	(7.6)
Amount excluded from effectiveness testing recognized in earnings based on an amortization approach	6.6	$ 5.6	6.1
Cash Flow Hedges | Interest rate contracts | Interest Expense
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings	$ 0.1		(0.6)
Cash Flow Hedges | Interest rate contracts | Other income/(expense), net
Cash Flow and Fair Value Hedges
Gains/(losses) reclassified from AOCL into earnings			$ 0.7

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