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Income Taxes - Tax Provision (Benefit), Reconciliation, and Tax Rates (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
U.S. and foreign income before income taxes |  |  |  |
United States | $ (63.6) | $ (152.3) | $ (85.4) |
Foreign | 248.5 | 131.2 | 227.5 |
Income (loss) before income taxes | 184.9 | (21.1) | 142.1 |
Current: |  |  |  |
U.S. federal statutory tax | 8.2 | 94.6 | 7.5 |
State | (1.6) | 5.6 | 0.8 |
Foreign | 46.3 | 34.2 | 30.4 |
Total current income tax provision (benefit) | 52.9 | 134.4 | 38.7 |
Deferred: |  |  |  |
U.S. federal statutory tax | 4.0 | 15.1 | (29.3) |
State | (6.2) | 8.9 | (4.2) |
Foreign | (1.0) | (10.0) | (2.5) |
Total deferred income (loss) before income taxes | (3.2) | 13.9 | (36.0) |
Non-current tax expense (income) | 6.2 | 0.9 | 13.0 |
Income tax provision | $ 55.9 | $ 149.2 | $ 15.7 | $ 47.2
Reconciliation of U.S. federal statutory income tax rate to effective income tax rate |  |  |  |
U.S. federal statutory tax rate | 21.00% | 35.00% | 35.00% |
Foreign earnings, net of foreign taxes | (11.60%) | 245.40% | (42.40%) |
State income taxes, net of U.S. federal income tax benefit | (3.30%) | (51.80%) | (1.50%) |
U.S. tax on deemed dividends | (0.40%) | (14.00%) | 1.30% |
Tax Act impact | 0.70% | (704.30%) | 0.00% |
Tax Reform - GILTI | 9.70% | 0.00% | 0.00% |
Tax Reform - BEAT | 2.80% | 0.00% | 0.00% |
Deferred tax impact on foreign unrepatriated earnings | (1.00%) | (65.50%) | 0.00% |
Goodwill impairment | 0.00% | (81.50%) | 0.00% |
Sale of subsidiary | 0.00% | 0.00% | 3.80% |
Uncertain tax positions | 3.40% | (4.10%) | 9.20% |
Foreign currency adjustments | 2.20% | (0.70%) | (0.40%) |
Intercompany interest transfer pricing adjustment | 1.50% | 0.00% | 0.00% |
Tax authority settlements | 0.00% | (10.00%) | 0.00% |
Nontaxable interest income | (2.70%) | 36.90% | 0.00% |
Nondeductible interest expense | 0.00% | (12.60%) | 0.00% |
Valuation allowance | 3.00% | (19.60%) | 2.00% |
Other permanent differences | 5.00% | (60.40%) | 4.00% |
Effective income tax rate | 30.20% | (707.10%) | 11.00% | 21.70%
Effective income tax rate | 30.20% | (707.10%) | 11.00% | 21.70%
Provision for income taxes | $ 55.9 | $ 149.2 | $ 15.7 | $ 47.2
Transition tax toll charge on historic accumulated foreign earnings |  | $ 143.7 |  |
Provisional undistributed accumulated earnings of foreign subsidiary | 814.0 |  |  |
Foreign withholding tax, if undistributed earnings are no reinvested indefinitely | 179.0 |  |  |
Accumulated foreign earnings deemed repatriated | 1,100.0 |  |  |
Provisional estimate of the associated foreign withholding and state income tax effects | $ 11.2 |  |  |
Without transition tax toll charge |  |  |  |
Reconciliation of U.S. federal statutory income tax rate to effective income tax rate |  |  |  |
Effective income tax rate |  | (25.90%) |  |
Effective income tax rate |  | (25.90%) |  |

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