Stockholders' Equity - AOCL (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 138,100,000	$ (189,900,000)	$ (22,100,000)	$ 285,800,000
Foreign currency translation adjustments	(31,500,000)	(64,800,000)	600,000	(140,100,000)
Balance at end of period	214,100,000	(152,600,000)	214,100,000	(152,600,000)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(143,200,000)	(170,500,000)	(175,300,000)	(95,200,000)
Balance at end of period	(174,700,000)	(235,300,000)	(174,700,000)	(235,300,000)
Tax expense (benefits)			0	0
Net amount reclassified to earnings			0	0
Pensions
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(1,600,000)	(4,000,000.0)	(1,600,000)	(4,000,000.0)
Net change from period revaluations	0	0	0	0
Balance at end of period	$ (1,600,000)	$ (4,000,000.0)	$ (1,600,000)	$ (4,000,000.0)