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Notes Payable and Long-Term Debt (Details) € in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2016 EUR (€) | Jul. 20, 2016 USD ($) | Dec. 31, 2015 USD ($) | Mar. 12, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Short-term Debt, Weighted Average Interest Rate | 2.30% | 2.30% |  | 1.30% |
Debt, Weighted Average Interest Rate | 3.80% | 3.80% |  | 3.60% |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt | $ 2,063,000,000 |  |  | $ 2,269,600,000 |
Current portion of long-term debt | 19,400,000 |  |  | 160,700,000 |
Long-term debt, net of current portion | 2,043,600,000 |  |  | 2,108,900,000 |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
2017 | 175,900,000 |  |  |  |
2018 | 17,100,000 |  |  |  |
2019 | 136,100,000 |  |  |  |
2020 | 252,100,000 |  |  |  |
2021 | 2,100,000 |  |  |  |
After 2021 | 1,647,400,000 |  |  |  |
Total payments | 2,230,700,000 |  |  |  |
Less: unamortized discounts | 11,200,000 |  |  |  |
Total | 2,219,500,000 |  |  |  |
Multi-currency revolving credit agreement, maximum borrowing capacity | 1,250,000,000 |  |  |  |
Estimated fair value of senior unsecured notes | 2,081,400,000 |  |  | 2,197,600,000 |
Fair value higher than carrying value for senior unsecured notes | 62,000,000 |  |  | 17,700,000 |
Outstanding letters of credit | 32,300,000 |  |  | 29,300,000 |
Short Term Borrowings [Member] |  |  |  |  |
Short-term debt |  |  |  |  |
Total short-term debt | 156,500,000 |  |  | 280,700,000 |
Senior Notes Due November 2016 |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt |  |  |  | 152,200,000 |
Debt instrument par value | $ 150,000,000 |  |  |  |
Debt instrument stated interest rate | 5.75% | 5.75% |  |  |
Debt instrument maturity period | Nov. 01, 2016 |  |  |  |
Senior Notes Due October 2019 |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt | $ 139,100,000 |  |  | 138,500,000 |
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] |  |  |  |  |
Total long-term debt | $ 251,900,000 |  |  | 245,600,000 |
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] |  |  |  |  |
Total long-term debt | $ 520,700,000 |  |  | 536,800,000 |
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] |  |  |  |  |
Total long-term debt | $ 495,600,000 |  |  | 495,100,000 |
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] |  |  |  |  |
Total long-term debt | $ 118,800,000 |  |  | 118,700,000 |
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] |  |  |  |  |
Total long-term debt | $ 493,300,000 |  |  | 493,000,000 |
Debt instrument par value | $ 500,000,000 |  |  |  |
Debt instrument stated interest rate | 4.375% | 4.375% |  |  |
Debt instrument maturity period | Mar. 15, 2045 |  |  |  |
Multi Currency Revolving Credit Facility [Member] |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Multi-currency revolving credit agreement, maximum borrowing capacity | $ 1,000,000,000 |  |  |  |
Commercial Paper [Member] |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt | 50,800,000 |  |  | 215,000,000 |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Multi-currency revolving credit agreement, current borrowing capacity |  |  |  |  | $ 1,000,000,000.0
Term Loan Facilities And Other [Member] |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt | 43,600,000 |  |  | 89,700,000 |
Interest Rate Swap [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Derivative, Notional Amount |  |  | $ 384,000,000 |  |
Interest Rate Swap [Member] | Senior Notes Four [Member] |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Derivative liabilities |  |  |  | 1,900,000 |
Interest Rate Swap [Member] | Senior Notes Three [Member] |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Derivative liabilities |  |  |  | 800,000 |
Unamortized portion of debt derivative [Member] | Senior Notes Four [Member] |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Derivative assets | 3,900,000 |  |  |  |
Unamortized portion of debt derivative [Member] | Senior Notes Three [Member] |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt | 4,100,000 |  |  | 5,500,000 |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |
Derivative assets | $ 1,300,000 |  |  |  |
Unamortized portion of debt derivative [Member] | Senior Notes Two [Member] |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |
Total long-term debt |  |  |  | $ 2,400,000 |

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