Stockholders' Equity - AOCL (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (100,700,000)	$ 318,300,000	$ 285,800,000	$ 504,600,000
Foreign currency translation adjustments	(57,800,000)	6,700,000	(75,300,000)	(4,100,000)
Balance at end of period	(189,900,000)	401,600,000	(189,900,000)	401,600,000
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(112,700,000)	(69,400,000)	(95,200,000)	(58,600,000)
Balance at end of period	(170,500,000)	(62,700,000)	(170,500,000)	(62,700,000)
Tax expense			0	0
Net amount reclassified to earnings			0	0
Pensions
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(4,000,000.0)	(6,900,000)	(4,000,000.0)	(6,900,000)
Net change from period revaluations	0	0	0	0
Balance at end of period	$ (4,000,000.0)	$ (6,900,000)	$ (4,000,000.0)	$ (6,900,000)