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Income Taxes, Tax Cuts and Jobs Act (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Tax Cuts and Jobs Act of 2017 [Abstract] |  |  |  |  |
Corporate income tax rate |  |  | 35.00% | 35.00% | 35.00%
Charge to deferred income tax expense for effects of Tax Reform Act | $ 47.7 |  |  |  |
Recognition of valuation allowance on foreign tax credit carryforwards | 52.0 |  |  |  |
Charge to deferred income tax expense related to reversal of indefinite reinvestment assertion | 7.3 |  |  |  |
Charge to deferred income tax expense related to reduction in FIN 48 assets | 4.1 |  |  |  |
Benefit related to write-off of net outside basis deferred tax liabilities | (7.7) |  |  |  |
Benefit related to tax effect on OCI | (3.1) |  |  |  |
Benefit related to estimated impact of remeasurement of deferred tax assets and liabilities | (4.9) |  |  |  |
Estimated Toll Charge | $ 96.0 |  |  |  |
Plan [Member] |  |  |  |  |
Tax Cuts and Jobs Act of 2017 [Abstract] |  |  |  |  |
Corporate income tax rate |  | 21.00% |  |  |

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- Definition Amount charged to expense for foreign withholding taxes on undistributed earnings and profits of U.S. owned subsidiaries that are no longer considered to be indefinitely reinvested for which accounting for tax effect is incomplete pursuant to Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
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- Definition Amount of reasonable estimate for income tax expense (benefit) for the tax effect on other comprehensive income pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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- Definition Amount of reasonable estimate for income tax expense from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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- Definition Amount charged to expense to increase valuation allowance for foreign tax credit carryforwards pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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- Definition Amount of reasonable estimate for income tax expense (benefit) for the write-off of the net outside tax basis deferred tax liabilities due to the modified territorial system that has been implemented in the U.S. pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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