Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income (loss) from continuing operations:
United States	$ 68.8	$ 14.0	$ (14.2)
Foreign	(32.7)	25.4	(140.1)
Income (loss) from continuing operations before income taxes	36.1	39.4	(154.3)
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	0.0	(4.9)
Total (provision) benefit	$ 47.9	$ (9.1)	$ 2.7
Reconciliation of the U.S. federal statutory tax rate to effective income tax rate
Tax at U.S. federal statutory rate (as a percent)	35.00%	35.00%	35.00%
State and local taxes, net of U.S. federal benefit (as a percent)	4.40%	5.00%	(0.10%)
U.S. credits and exemptions (as a percent)	(8.50%)	(12.90%)	1.50%
Foreign earnings taxed at lower rates (as a percent)	(14.90%)	(5.90%)	(9.00%)
Audit settlements with taxing authorities (as a percent)	(0.10%)	0.00%	0.70%
Adjustments to uncertain tax positions (as a percent)	(9.80%)	(1.90%)	(5.40%)
Changes in valuation allowance (as a percent)	54.40%	17.40%	(18.80%)
Tax on distributions of foreign earnings (as a percent)	0.00%	0.70%	(0.20%)
Goodwill impairment and basis adjustments (as a percent)	(226.30%)	(0.00%)	(2.40%)
Disposition of dry cooling business (as a percent)	0.00%	(15.60%)	0.00%
U.S. Tax Legislation	32.60%	0.00%	0.00%
Other (as a percent)	0.50%	1.30%	0.40%
Effective income tax rate (as a percentage)	(132.70%)	23.10%	1.70%
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
Total deferred tax assets	$ 49.6	$ 48.5

The tax effects as of the balance sheet date of the amount of excesses of tax deductions over taxable income in a year which cannot be used on the tax returns in the current year but may be carried forward to reduce taxable income or income taxes payable in a future year in certain jurisdictions and the tax effects arising from all unused tax credits available to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.

No definition available.