Employee Benefit Plans - 401(k) plan, Deferred Compensation Plan and Non-US Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Benefit Textuals [Abstract]
Employee contribution matched	30.00%
Matching contributions to plan	$ 20.2	$ 20.2	$ 21.1
NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	26.8	24.3
Investment	26.8	24.3
Prepaid expenses and other current assets | NQDC
Employee Benefit Textuals [Abstract]
Investment	4.1	3.6
Other long-term assets | NQDC
Employee Benefit Textuals [Abstract]
Investment	22.7	20.7
Other accrued liabilities | NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	4.1	3.6
Other long-term liabilities | NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	$ 22.7	$ 20.7