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Income Taxes, Tax Liability and Uncertainties (Details) $ in Millions | Dec. 31, 2016 USD ($) country city state | Dec. 31, 2015 USD ($)
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Income Tax Disclosure [Abstract] |  |
Liability for Uncertain Tax Positions, Noncurrent | $ 24.3 |
Income tax liability [Abstract] |  |
Net current liability for income tax | 40.7 | $ 2.3
Current receivable | 121.1 | 90.4
Current payable | $ 80.4 | $ 88.1
Income tax uncertainties [Abstract] |  |
Number of states where company or one of its subsidiaries files income tax returns | state | 47 |
Number of cities where company or one of its subsidiaries files income tax returns | city | 25 |
Number of other countries the company or one of its subsidiaries files income tax returns | country | 80 |

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