Comprehensive Earnings (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total equity	$ 20,492.7	$ 22,954.1	$ 11,883.8	$ 12,167.1
Net unrealized gain on marketable securities, net of tax	0.0	1.2
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(32.2)	26.1
Foreign currency translation adjustment	(1,802.4)	(461.5)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,744.3)	(858.0)
Net unrealized gain on marketable securities, net of tax	0.0	1.2
Net unrecognized (loss) gain and prior service cost related to defined benefit plans, net of tax	32.2	(26.1)
Foreign currency translation adjustment	(1,802.4)	(461.5)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,744.3)	(858.0)
Cumulative Effect, Period of Adoption, Adjustment
Total equity				0.0
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax			0.2
Accumulated Other Comprehensive Income (Loss), Net of Tax			(3.6)
Net unrecognized (loss) gain and prior service cost related to defined benefit plans, net of tax			(0.2)
Accumulated Other Comprehensive Income (Loss), Net of Tax			(3.6)
AOCI Attributable to Parent [Member]
Total equity	(1,744.3)		(1,797.2)	(1,441.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax			(1,797.2)	(1,441.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax			(1,797.2)	(1,441.3)
AOCI Attributable to Parent [Member] | Cumulative Effect, Period of Adoption, Adjustment
Total equity				(3.6)
Foreign Currency Translation Adjustment
Foreign currency translation adjustment			(1,674.5)	(1,259.0)
Foreign currency translation adjustment	(1,340.9)	1,213.0	(415.5)
Foreign currency translation adjustment			(1,674.5)	(1,259.0)
Cash flow hedging relationships | Gains and Losses on Derivatives in Cash Flow Hedging Relationships
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	9.2	(18.0)
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	9.2	(18.0)
Cash flow hedging relationships | Gains and Losses on Derivatives in Cash Flow Hedging Relationships | Cumulative Effect, Period of Adoption, Adjustment
Other Comprehensive Income, Other, Net of Tax			(3.4)
Net Investment Hedging
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	16.7	(353.6)	(74.3)	(130.9)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	$ 16.7	$ (353.6)	$ (74.3)	$ (130.9)