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Income Taxes, Tax Liability and Uncertainties (Details) $ in Millions | Dec. 31, 2019 USD ($) country city state | Dec. 31, 2018 USD ($)
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Income tax liability [Abstract] |  |
Net current liability for income tax | $ 4.4 | $ 59.1
Current receivable | 235.3 | 156.2
Current payable | 230.9 | 215.3
Liability for Uncertain Tax Positions, Noncurrent | $ 152.2 | $ 171.2
Income tax uncertainties [Abstract] |  |
Number of states where company or one of its subsidiaries files income tax returns | state | 46 |
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 | 78 |

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