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Summary of Significant Accounting Policies, Part 3 (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 02, 2019
Environmental Costs [Abstract] |  |  |  |
Environmental reserves - current portion | $ 3.2 | $ 5.6 |  |
Forecast [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 250.0
Operating Lease, Liability |  |  |  | $ 250.0
Environmental Reserves [Member] |  |  |  |
Movement in valuation allowances and reserves [Roll Forward] |  |  |  |
Balance at beginning of period | 11.6 | 11.9 | $ 13.0 |
Charged to costs and expenses | 8.2 | 12.1 | 7.0 |
Acquisition-related additions and other | 1.7 | 1.7 | 0.5 |
Deductions | (14.6) | (14.1) | (8.6) |
Balance at end of period | $ 6.9 | $ 11.6 | $ 11.9 |
Minimum [Member] |  |  |  |
Impairment Testing for Goodwill [Abstract] |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount | 10.00% |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New accounting pronouncement or change in accounting principle, description of financial statement line items | less than 1% of our total consolidated assets and liabilities |  |  |

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