Debt and Credit Facilities - Total Debt Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Nov. 26, 2019
Debt Instrument [Line Items]
Short-term borrowings	$ 7.2	$ 98.9
Current portion of long-term debt	22.3	16.7
Total current debt	29.5	115.6
Other	24.9	30.9
Total long-term debt, less current portion	3,731.4	3,698.6
Total debt	3,760.9	3,814.2
Finance lease liability, current	10.5	10.4
Finance lease liability, noncurrent	23.9	28.7
Unamortized discount and issuance costs	$ 20.1	$ 24.6
Weighted average interest rate on short-term borrowing	2.20%	5.00%
Weighted average interest rate on long-term debt	4.40%	4.80%
Revolving Credit Facility
Debt Instrument [Line Items]
Short-term borrowings		$ 89.0
Line of Credit
Debt Instrument [Line Items]
Short-term borrowings	$ 7.2	9.9
Senior Notes due December 2022
Debt Instrument [Line Items]
Senior notes	$ 423.3	421.9
Debt interest rate	4.875%
Senior Notes due April 2023
Debt Instrument [Line Items]
Senior notes	$ 422.9	422.0
Debt interest rate	5.25%
Senior Notes due September 2023
Debt Instrument [Line Items]
Senior notes	$ 490.2	445.6
Debt interest rate	4.50%
Senior Notes due December 2024
Debt Instrument [Line Items]
Senior notes	$ 422.1	421.9
Debt interest rate	5.125%
Senior Notes due September 2025
Debt Instrument [Line Items]
Senior notes	$ 397.8	397.4
Debt interest rate	5.50%
Senior Notes due December 2027
Debt Instrument [Line Items]
Senior notes	$ 420.9	420.4
Debt interest rate	4.00%		4.00%
Senior Notes due July 2033
Debt Instrument [Line Items]
Senior notes	$ 446.0	445.7
Debt interest rate	6.875%
Term Loan A Facility due August 2022
Debt Instrument [Line Items]
Term Loan A	$ 474.7	474.6
Term Loan A due July 2023
Debt Instrument [Line Items]
Term Loan A	$ 208.6	$ 218.2