Accumulated Other Comprehensive Income (Loss) - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 12,621.3	$ 13,673.1	$ 13,735.8
Ending balance	13,664.1	12,621.3	13,673.1
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(539.5)	(652.5)	(758.7)
Reclassification of AOCI, current period, before tax	(7.5)
Tax benefit (expense)	(17.6)	30.5	(0.1)
Net period other comprehensive income (loss)			179.5
Reclassification of stranded tax effects			(73.3)
Ending balance	(558.7)	(539.5)	(652.5)
Accumulated foreign currency adjustment, excluding net investment hedging, attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax	(85.6)	196.0	129.3
Accumulated foreign currency adjustment, net investment hedging, attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax	76.5	(113.5)	50.3
Gain (loss) on derivative instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(173.9)	(87.8)	(0.3)
OCI before reclassifications before tax	51.1	(113.5)	(111.3)
Reclassification of AOCI, current period, before tax	7.5	(0.5)	0.6
Tax benefit (expense)	(15.7)	27.9	27.0
Net period other comprehensive income (loss)			(83.7)
Reclassification of stranded tax effects			(3.8)
Ending balance	(131.0)	(173.9)	(87.8)
Pension and postretirement benefit adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(397.7)	(351.0)	(330.7)
Reclassification of AOCI, current period, before tax	7.1	(7.6)	26.5
Tax benefit (expense)	(41.9)	15.4	(2.9)
Net period other comprehensive income (loss)			(22.6)
Reclassification of stranded tax effects			2.3
Ending balance	(275.1)	(397.7)	(351.0)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax	(1.2)	(1.6)	(2.5)
Net gain (loss) and net prior service
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax	158.6	(52.9)	(43.7)
Equity method investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(56.7)	(70.9)	(60.3)
OCI before reclassifications before tax	20.8	19.4	(14.4)
Tax benefit (expense)	(5.3)	(5.2)	3.8
Net period other comprehensive income (loss)			(10.6)
Reclassification of stranded tax effects			0.0
Ending balance	(41.2)	(56.7)	(70.9)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,167.8)	(1,162.2)	(1,150.0)
Tax benefit (expense)	(80.5)	68.6	27.8
Net period other comprehensive income (loss)			62.6
Reclassification of stranded tax effects			(74.8)
Ending balance	$ (1,006.0)	$ (1,167.8)	$ (1,162.2)