Debt and Credit Facilities - Total Debt Outstanding (Details) € in Millions	Sep. 30, 2019 USD ($)	Sep. 30, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)
Debt Instrument [Line Items]
Short-term borrowings	$ 205,000,000.0		$ 232,800,000
Current portion of long-term debt	14,200,000		4,900,000
Total current debt	219,200,000		237,700,000
Other	33,200,000		29,200,000
Total long-term debt, less current portion	3,694,000,000.0		3,236,500,000
Total debt	3,913,200,000		3,474,200,000
Finance lease liabilities	10,300,000
Unamortized discounts ands issuance costs	$ 21,500,000		$ 24,300,000
Short-term debt, weighted average interest rate	2.80%	2.80%	2.80%	2.80%
Long-term debt, weighted average interest rate	5.20%	5.20%	5.40%	5.40%
ASU 2016-02
Debt Instrument [Line Items]
Other	$ 30,400,000
Revolving Credit Facility
Debt Instrument [Line Items]
Short-term borrowings	58,000,000.0		$ 140,000,000.0
Line of Credit
Debt Instrument [Line Items]
Short-term borrowings	9,400,000		8,900,000
U.S. Accounts Receivable Securitization Program | U.S. Program
Debt Instrument [Line Items]
Amount of borrowing under securitization program	60,000,000.0		0
European Accounts Receivable Securitization Program | European Program
Debt Instrument [Line Items]
Amount of borrowing under securitization program	$ 77,600,000	€ 70.9	83,900,000	€ 73.3
6.50% Senior Notes due December 2020
Debt Instrument [Line Items]
Debt interest rate	6.50%	6.50%
Senior notes	$ 424,400,000		424,000,000.0
4.875% Senior Notes due December 2022
Debt Instrument [Line Items]
Debt interest rate	4.875%	4.875%
Senior notes	$ 421,700,000		421,100,000
5.25% Senior Notes due April 2023
Debt Instrument [Line Items]
Debt interest rate	5.25%	5.25%
Senior notes	$ 421,800,000		421,200,000
4.50% Senior Notes due September 2023
Debt Instrument [Line Items]
Debt interest rate	4.50%	4.50%
Senior notes	$ 435,100,000		454,900,000
5.125% Senior Notes due December 2024
Debt Instrument [Line Items]
Debt interest rate	5.125%	5.125%
Senior notes	$ 421,800,000		421,300,000
5.50% Senior Notes due September 2025
Debt Instrument [Line Items]
Debt interest rate	5.50%	5.50%
Senior notes	$ 397,300,000		397,100,000
6.875% Senior Notes due July 2033
Debt Instrument [Line Items]
Debt interest rate	6.875%	6.875%
Senior notes	$ 445,600,000		445,500,000
Term Loan A due July 2022
Debt Instrument [Line Items]
Term loans	474,600,000		0
Term Loan A due July 2023
Debt Instrument [Line Items]
Term loans	$ 218,500,000		$ 222,200,000