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Subsequent Events Senior Notes Offering (Details) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 26, 2020 USD ($) | Nov. 12, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Feb. 26, 2020 EUR (€) | Feb. 26, 2020 USD ($)
Proceeds from issuance of long-term debt |  |  | $ 400,000,000 | $ 0 | $ 1,789,200,000 |  |
Debt, Long-term and Short-term, Combined Amount |  |  | 2,258,873,000 | 2,317,723,000 |  |  |
Long-term debt |  |  | 2,214,608,000 | 2,134,400,000 |  |  |
Four and One Eighth Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 400,000,000 |  |  |  |  |
Redemption Price Percent If Change In Control Occurs in Addition to Accrued and Unpaid Interest |  | 101.00% |  |  |  |  |
Proceeds from issuance of long-term debt |  | $ 394,700,000 |  |  |  |  |
Debt, Long-term and Short-term, Combined Amount |  |  | 400,000,000 | 0 |  |  |
Bank Borrowings [Member] |  |  |  |  |  |  |
Debt, Long-term and Short-term, Combined Amount |  |  | 795,830,000 | 951,800,000 |  |  |
Senior Notes [Member] | Four and One Eighth Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument Offering Price Percentage at Principle Amount |  | 100.00% |  |  |  |  |
U S Term Loans [Member] | Bank Borrowings [Member] |  |  |  |  |  |  |
Debt, Long-term and Short-term, Combined Amount |  |  | 760,000,000 | $ 800,000,000 |  |  |
Long-term debt |  |  | $ 80,000,000 |  |  |  |
Subsequent Event [Member] | Four and One Eighth Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 200,000,000
Proceeds from issuance of long-term debt | $ 196,500,000 |  |  |  |  |  |
Subsequent Event [Member] | Two and One Quarter Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount | € |  |  |  |  |  | € 500,000,000 |
Debt Instrument Offering Price Percentage at Principle Amount |  |  |  |  |  | 100.00% | 100.00%
Proceeds from issuance of long-term debt | $ 494,000,000.0 |  |  |  |  |  |
Subsequent Event [Member] | Senior Notes [Member] | Four and One Eighth Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument Offering Price Percentage |  |  |  |  |  | 99.50% | 99.50%
Subsequent Event [Member] | U S Term Loans [Member] | Bank Borrowings [Member] |  |  |  |  |  |  |
Debt, Long-term and Short-term, Combined Amount |  |  |  |  |  |  | $ 751,200,000
Debt Instrument, Redemption - Pre March 15 2020 [Member] | Subsequent Event [Member] | Two and One Quarter Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Maximum Redemption Percent Allowed And Limited To Proceeds From Equity Offering |  |  |  |  |  | 35.00% | 35.00%
Debt Redemption, Price Percent Of Principal Amount, From the Proceeds of Certain Equity Offerings plus accrued and unpaid interest |  |  |  |  |  | 102.25% | 102.25%
Debt Instrument, Redemption Price, Percentage Plus a Make-Whole Premium | 100.00% |  |  |  |  |  |
Redemption Price Percent If Change In Control Occurs in Addition to Accrued and Unpaid Interest |  |  |  |  |  | 101.00% | 101.00%
Debt Instrument Redemption Period - Post March 1 2023 [Member] | Subsequent Event [Member] | Two and One Quarter Percent Senior Notes Due 2028 [Member] |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage, Initial, Plus Accrued and Unpaid Interest | 101.125% |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage, Ending, Plus Accrued and Unpaid Interest | 100.00% |  |  |  |  |  |

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