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Notes Payable and Long-Term Debt (Details) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2017 USD ($) | Jul. 20, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |
Short-term Debt, Weighted Average Interest Rate, at Point in Time | 4.30% | 4.30% | 3.10% |
Debt, Weighted Average Interest Rate | 3.40% | 3.40% | 3.80% |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 2,080,500,000 |  | $ 2,119,500,000 |
Current portion of long-term debt | 139,800,000 |  | 15,800,000 |
Long-term debt, net of current portion | 1,940,700,000 |  | 2,103,700,000 |
Long-term Debt, by Maturity [Abstract] |  |  |  |
2019 | 172,600,000 |  |  |
2020 | 257,300,000 |  |  |
2021 | 1,300,000 |  |  |
2022 | 573,700,000 |  |  |
2023 | 100,000 |  |  |
After 2023 | 1,120,700,000 |  |  |
Total payments | 2,125,700,000 |  |  |
Less: unamortized discounts | 12,400,000 |  |  |
Total | 2,113,300,000 |  |  |
Multi-currency revolving credit agreement, maximum borrowing capacity | 1,500,000,000 |  |  |
Estimated fair value of senior unsecured notes | 2,058,100,000 |  | 2,209,100,000 |
Debt, difference between fair value and carrying value | (7,600,000) |  | 116,100,000 |
Outstanding letters of credit | 42,700,000 |  | 31,400,000 |
Short Term Borrowings [Member] |  |  |  |
Short-term debt |  |  |  |
Total short-term debt | 32,800,000 |  | 68,800,000 |
Senior Notes Due October 2019 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | 135,400,000 |  | 137,400,000 |
Debt instrument par value | $ 134,000,000 |  |  |
Debt instrument stated interest rate | 8.00% | 8.00% |  |
Debt instrument maturity period | Oct. 01, 2019 |  |  |
Senior Notes Due September 2020 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 250,900,000 |  | 251,400,000 |
Debt instrument par value | $ 250,000,000 |  |  |
Debt instrument stated interest rate | 4.625% | 4.625% |  |
Debt instrument maturity period | Sep. 15, 2020 |  |  |
Senior Notes Due November 2022 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 570,000,000 |  | 595,700,000 |
Debt instrument par value | € |  | € 500 |  |
Debt instrument stated interest rate | 1.80% | 1.80% |  |
Debt instrument maturity period | Nov. 07, 2022 |  |  |
Senior Notes Due March 2025 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 496,600,000 |  | 496,100,000 |
Debt instrument par value | $ 500,000,000 |  |  |
Debt instrument stated interest rate | 3.375% | 3.375% |  |
Debt instrument maturity period | Mar. 15, 2025 |  |  |
Senior Notes Due February 2029 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 119,100,000 |  | 118,900,000 |
Debt instrument par value | $ 121,000,000 |  |  |
Debt instrument stated interest rate | 7.125% | 7.125% |  |
Debt instrument maturity period | Feb. 15, 2029 |  |  |
Senior Notes Due March 2045 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 493,700,000 |  | 493,500,000 |
Debt instrument par value | $ 500,000,000 |  |  |
Debt instrument stated interest rate | 4.375% | 4.375% |  |
Debt instrument maturity period | Mar. 15, 2045 |  |  |
Term Loan Facilities And Other [Member] |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Long-term Debt | $ 14,800,000 |  | 26,500,000 |
Revolving Credit Facility [Member] |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |
Multi-currency revolving credit agreement, current borrowing capacity | 1,200,000,000 |  |  |
Commercial Paper [Member] |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |
Multi-currency revolving credit agreement, current borrowing capacity | 1,200,000,000 |  |  |
Interest Rate Swap [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Derivative, Notional Amount |  |  |  | $ 384,000,000
2016 swap termination event [Member] | Interest Rate Swap [Member] | Senior Notes Due October 2019 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Derivative liabilities |  |  | 800,000 |
2016 swap termination event [Member] | Interest Rate Swap [Member] | Senior Notes Due September 2020 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Derivative liabilities |  |  | 2,900,000 |
2016 swap termination event [Member] | Unamortized portion of debt derivative [Member] | Senior Notes Due October 2019 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Derivative assets | 400,000 |  |  |
2016 swap termination event [Member] | Unamortized portion of debt derivative [Member] | Senior Notes Due September 2020 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Derivative assets | 1,900,000 |  |  |
2009 swap termination event [Member] | Unamortized portion of debt derivative [Member] | Senior Notes Due October 2019 |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |
Derivative assets | $ 1,200,000 |  | $ 2,700,000 |

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