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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount |  |  |  |  | $ 46.0 |  |  |
Income from continuing operations before income taxes in the U.S. countries |  |  |  | $ (151.6) | (115.1) | $ 6.3 |  |
Income from continuing operations before income taxes in the non-U.S. countries |  |  |  | $ 1,149.0 | (423.8) | (200.0) |  |
Tax Cuts and Jobs Act of 2017, Measurement Period Adjustment, Income Tax Expense (Benefit) | $ 11.7 |  |  |  |  |  |  |
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) |  | $ 16.5 |  |  |  |  |  |
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) |  |  |  |  |  | 16.5 |  |
Tax Cuts and Jobs Act of 2017, tax benefit on re-measurement on deferred tax assets and liabilities |  | 38.5 |  |  |  |  |  |
Tax Cuts and Jobs Act of 2017, transition tax |  | 17.3 |  |  |  |  |  |
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Liability, Income Tax (Expense) Benefit |  |  |  |  |  | 20.0 |  |
Tax Cuts and Jobs Act of 2017, tax benefit on valuation allowance |  |  |  |  |  | 19.3 |  |
Deferred tax assets related to U.S. foreign tax credits | 123.6 | 132.3 |  |  | 123.6 | 132.3 |  |
Deferred tax assets related to net operating loss carryforwards | 148.4 | 187.1 |  |  | 148.4 | 187.1 |  |
Net operating loss carryforwards | 784.2 |  |  |  | $ 784.2 |  |  |
Operating Loss Carryforwards, Limitations on Use |  |  |  |  | 40.2 |  |  |
Operating loss carryforwards, Not subject to expiration | 449.8 |  |  |  | $ 449.8 |  |  |
Operating loss carryforwards, Subject to expiration | 334.4 |  |  |  | 334.4 |  |  |
Valuation allowance on NOL carryforwards and FTC | 271.8 |  |  |  | 271.8 |  |  |
Income Tax Expense (Benefit), Discrete Item |  |  |  |  |  | 32.2 | $ 8.4 |
Other discrete income tax expenses |  |  |  |  | $ 21.0 | $ 15.7 |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount |  |  |  |  |  |  | 5.5 |
Unrecognized Tax Benefits Associated with Liabilities for Unrecognized Tax Benefits |  |  |  |  |  |  | $ 5.3 |
Consilidated effective income tax rate excluding discrete items |  |  |  |  | (24.80%) | (96.00%) | 20.30% |
Minimum percentage threshold for recognition of tax benefits |  |  |  |  | 50.00% |  |  |
Total unrecognized tax benefits | 143.0 | 147.6 |  |  | $ 143.0 | $ 147.6 | $ 122.0 |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions With Net Operating Loss Carryforwards |  |  |  |  | 6.5 | 8.2 |  |
Amount of unrecognized tax benefits affecting the consolidated effective income tax rate if recognized | 127.4 |  |  |  | 127.4 |  |  |
Amount of accrued interest and penalties included in other liabilities | 40.5 | 38.6 |  |  | 40.5 | 38.6 |  |
Amount of interest and penalties recognized in net tax expense |  |  |  |  | 1.9 | 4.4 | 3.8 |
Income tax benefits, inclusive of interest and penalties due to lapses in statute of limitations | 5.3 | 1.1 |  |  | $ 5.3 | 1.1 | 0.6 |
Document Period End Date |  |  |  |  | Dec. 31, 2018 |  |  |
Aggregate Undistributed Earnings of Subsidiaries to be Continually Reinvested | 386.7 |  |  |  | $ 386.7 |  |  |
Other Liabilities [Member] |  |  |  |  |  |  |  |
Total unrecognized tax benefits | $ 136.5 | $ 139.4 |  |  | $ 136.5 | $ 139.4 |  |
Minimum [Member] |  |  |  |  |  |  |  |
Deferred Tax Assets, Foreign, Expiration Date |  |  |  |  | 2022 |  |  |
Operating loss carryforwards tax credits expiration year |  |  |  |  | 2019 |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Deferred Tax Assets, Foreign, Expiration Date |  |  |  |  | 2028 |  |  |
Operating loss carryforwards tax credits expiration year |  |  |  |  | 2037 |  |  |
Other Operating Income (Expense) [Member] |  |  |  |  |  |  |  |
Income Tax Expense (Benefit), Discrete Item |  |  |  |  |  |  | $ 16.9 |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |
Decline in unrecognized tax benefits during next twelve months |  |  |  |  |  |  |  | $ 0.5
Accrued interest and penalty assessments related to the decline in unrecognized tax benefits |  |  |  |  |  |  |  | $ 0.3
Accounting Standards Update 2016-16 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member] |  |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | $ 14.1 |  |  |  |  |

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