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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule of income (loss) from continuing operations before income taxes and (provision for) benefit from income taxes | Income (loss) from continuing operations before income taxes and the (provision for) benefit from income taxes consisted of the following:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Income (loss) from continuing operations: |  |  |  |  |
United States | $ | 68.8 |  |  | $ | 14.0 |  |  | $ | (14.2 | )
Foreign | (32.7 | ) |  | 25.4 |  |  | (140.1 | )
| $ | 36.1 |  |  | $ | 39.4 |  |  | $ | (154.3 | )
(Provision for) benefit from income taxes: |  |  |  |  |
Current: |  |  |  |  |
United States | $ | 30.4 |  |  | $ | (4.3 | ) |  | $ | 10.9 |
Foreign | (3.5 | ) |  | (4.8 | ) |  | (3.3 | )
Total current | 26.9 |  |  | (9.1 | ) |  | 7.6 |
Deferred and other: |  |  |  |  |
United States | 23.5 |  |  | 0.2 |  |  | (10.7 | )
Foreign | (2.5 | ) |  | (0.2 | ) |  | 5.8 |
Total deferred and other | 21.0 |  |  | — |  |  | (4.9 | )
Total (provision) benefit | $ | 47.9 |  |  | $ | (9.1 | ) |  | $ | 2.7 |
Schedule of reconciliation of income tax computed at the U.S. federal statutory tax rate to the effective income tax rate | The reconciliation of income tax computed at the U.S. federal statutory tax rate to our effective income tax rate was as follows:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Tax at U.S. federal statutory rate | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State and local taxes, net of U.S. federal benefit | 4.4 | % |  | 5.0 | % |  | (0.1 | )%
U.S. credits and exemptions | (8.5 | )% |  | (12.9 | )% |  | 1.5 | %
Foreign earnings/losses taxed at lower rates | (14.9 | )% |  | (5.9 | )% |  | (9.0 | )%
Audit settlements with taxing authorities | (0.1 | )% |  | — | % |  | 0.7 | %
Adjustments to uncertain tax positions | (9.8 | )% |  | (1.9 | )% |  | (5.4 | )%
Changes in valuation allowance | 54.4 | % |  | 17.4 | % |  | (18.8 | )%
Tax on distributions of foreign earnings | — | % |  | 0.7 | % |  | (0.2 | )%
Worthless stock deductions and other basis adjustments | (226.3 | )% |  | — | % |  | (2.4 | )%
Disposition of dry cooling business | — | % |  | (15.6 | )% |  | — | %
U.S. tax reform | 32.6 | % |  | — | % |  | — | %
Other | 0.5 | % |  | 1.3 | % |  | 0.4 | %
| (132.7 | )% |  | 23.1 | % |  | 1.7 | %
Schedule of significant components of deferred tax assets and liabilities | Significant components of our deferred tax assets and liabilities were as follows:
| As of December 31,
| 2017 |  | 2016
Deferred tax assets: |  |  |
NOL and credit carryforwards | $ | 146.0 |  |  | $ | 78.2 |
Pension, other postretirement and postemployment benefits | 41.2 |  |  | 77.2 |
Payroll and compensation | 18.2 |  |  | 22.8 |
Legal, environmental and self-insurance accruals | 25.3 |  |  | 35.1 |
Working capital accruals | 11.5 |  |  | 16.4 |
Other | 17.6 |  |  | 20.7 |
Total deferred tax assets | 259.8 |  |  | 250.4 |
Valuation allowance | (110.9 | ) |  | (75.8 | )
Net deferred tax assets | 148.9 |  |  | 174.6 |
Deferred tax liabilities: |  |  |
Intangible assets recorded in acquisitions | 53.9 |  |  | 68.3 |
Basis difference in affiliates | 3.7 |  |  | 10.6 |
Accelerated depreciation | 28.8 |  |  | 40.6 |
Other | 12.9 |  |  | 6.6 |
Total deferred tax liabilities | 99.3 |  |  | 126.1 |
| $ | 49.6 |  |  | $ | 48.5 |
Schedule of changes in the balance of unrecognized tax benefits | The aggregate changes in the balance of unrecognized tax benefits for the years ended December 31, 2017, 2016 and 2015 were as follows:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Unrecognized tax benefit — opening balance | $ | 37.9 |  |  | $ | 48.8 |  |  | $ | 63.3 |
Gross increases — tax positions in prior period | 1.6 |  |  | 3.6 |  |  | 14.1 |
Gross decreases — tax positions in prior period | (0.3 | ) |  | (9.3 | ) |  | (7.6 | )
Gross increases — tax positions in current period | 0.3 |  |  | 0.7 |  |  | 11.3 |
Settlements | (1.3 | ) |  | — |  |  | — |
Lapse of statute of limitations | (7.1 | ) |  | (5.9 | ) |  | (4.4 | )
Gross decreases — Spin-Off | — |  |  | — |  |  | (26.7 | )
Change due to foreign currency exchange rates | 0.2 |  |  | — |  |  | (1.2 | )
Unrecognized tax benefit — ending balance | $ | 31.3 |  |  | $ | 37.9 |  |  | $ | 48.8 |

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- Definition Tabular disclosure of income from continuing operations before income tax between domestic and foreign jurisdictions and the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment of the related deferred tax asset in future years. + References No definition available. + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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