Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Short-term borrowings	$ 14.2	$ 14.3
Long-term Debt Types [Abstract]
Total long-term debt	2,471.5	1,629.3
Total Debt	2,485.7	1,643.6
Long Term Debt By Current And Noncurrent [Abstract]
Current liabilities	151.5	88.8
Noncurrent liabilities	2,334.2	1,554.8
Interest Rate And Other Disclosures [Abstract]
Debt issue costs	6.0	5.5
Term Loan A | Senior Secured Credit Facility - Amended II
Long-term Debt Types [Abstract]
Long-term Debt	$ 1,292.4
Interest Rate And Other Disclosures [Abstract]
Effective interest rate	2.10%
Debt issue costs	$ 5.4
Term Loan A | Senior Secured Credit Facility - Amended
Long-term Debt Types [Abstract]
Long-term Debt		$ 767.0
Interest Rate And Other Disclosures [Abstract]
Effective interest rate		3.50%
Debt issue costs		$ 3.0
Senior unsecured notes | Six hundred million senior unsecured notes
Long-term Debt Types [Abstract]
Long-term Debt	$ 987.5	$ 592.9
Interest Rate And Other Disclosures [Abstract]
Effective interest rate	4.60%	4.60%
Debt issue costs	$ 12.5	$ 7.1
Senior unsecured notes | Four hundred million senior unsecured notes
Interest Rate And Other Disclosures [Abstract]
Effective interest rate	5.50%
Revolving Credit Facility
Long-term Debt Types [Abstract]
Debt	$ 0.0	$ 115.0
Interest Rate And Other Disclosures [Abstract]
Average interest rate		3.50%
Other Non-US Dollar-denominated Facilities
Long-term Debt Types [Abstract]
Debt	$ 40.2	$ 4.9
Interest Rate And Other Disclosures [Abstract]
Average interest rate	1.90%	7.00%
Financing leases
Long-term Debt Types [Abstract]
Financing leases	$ 151.4	$ 149.5
Interest Rate And Other Disclosures [Abstract]
Average interest rate	4.00%	4.90%
Restricted Cash Borrowings
Debt Instrument [Line Items]
Short-term borrowings	$ 0.0	$ 10.3
Interest Rate And Other Disclosures [Abstract]
Short-term borrowings interest rate	0.00%	0.00%
Other
Debt Instrument [Line Items]
Short-term borrowings	$ 14.2	$ 4.0
Interest Rate And Other Disclosures [Abstract]
Short-term borrowings interest rate	5.40%	8.80%