Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	$ (336.1)
Cumulative effect of an accounting change				$ (0.7)	$ 12.2
Other comprehensive (loss) income, net of tax	(56.4)	$ (97.8)	$ 111.6
Accumulated other comprehensive income (loss), ending balance	(395.5)	(336.1)
Unrealized Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(299.4)	(208.8)	(292.2)
Cumulative effect of an accounting change					0.0
Current year deferrals to AOCI	(0.2)	(90.6)	83.4
Reclassifications from AOCI to Net income	2.6	0.0	0.0
Other comprehensive (loss) income, net of tax	2.4	(90.6)	83.4
Accumulated other comprehensive income (loss), ending balance	(297.0)	(299.4)	(208.8)
Pension Plan Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(36.4)	(31.4)	(56.6)
Cumulative effect of an accounting change					0.0
Current year deferrals to AOCI	(33.2)	(5.8)	17.1
Reclassifications from AOCI to Net income	(0.3)	0.8	8.1
Other comprehensive (loss) income, net of tax	(33.5)	(5.0)	25.2
Accumulated other comprehensive income (loss), ending balance	(69.9)	(36.4)	(31.4)
Unrealized Gain on Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	0.0	0.8	0.4
Cumulative effect of an accounting change					(0.8)
Current year deferrals to AOCI	0.0	0.0	0.4
Reclassifications from AOCI to Net income	0.0	0.0	0.0
Other comprehensive (loss) income, net of tax	0.0	0.0	0.4
Accumulated other comprehensive income (loss), ending balance	0.0	0.0	0.8
Unrealized Gain (Loss) on Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(0.3)	(1.6)	(2.0)
Cumulative effect of an accounting change					0.0
Current year deferrals to AOCI	(28.8)	1.7	(1.6)
Reclassifications from AOCI to Net income	0.5	(0.4)	2.0
Other comprehensive (loss) income, net of tax	(28.3)	1.3	0.4
Accumulated other comprehensive income (loss), ending balance	(28.6)	(0.3)	(1.6)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(336.1)	(241.0)	(350.4)
Cumulative effect of an accounting change					$ (0.8)
Current year deferrals to AOCI	(62.2)	(94.7)	99.3
Reclassifications from AOCI to Net income	2.8	0.4	10.1
Other comprehensive (loss) income, net of tax	(59.4)	(94.3)	109.4
Accumulated other comprehensive income (loss), ending balance	$ (395.5)	$ (336.1)	$ (241.0)