Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 22, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Contingency [Line Items]
Income before income taxes		$ 111.6	$ 118.1	$ 226.0	$ 240.4
Income tax (benefit) provision		$ (33.8)	$ 18.8	$ (1.0)	$ 63.8
Effective tax rate		(30.30%)	15.90%	(0.40%)	26.50%
Unrecognized tax benefits		$ 112.2		$ 112.2
Interest and penalties		18.4		18.4
Cumulative impact of cost sharing for stock-based compensation	$ 18.2
India tax authority
Income Tax Contingency [Line Items]
Unrecognized tax benefits		54.5		54.5
Maximum
Income Tax Contingency [Line Items]
Unrecognized tax benefits, maximum decrease in the next twelve months		$ 11.6		$ 11.6