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Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance For Doubtful Accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 12.8 | $ 11.9 | $ 11.2
Additions Charged to Costs and Expenses | 5.5 | 8.1 | 8.2
Other Additions (Deductions) | 0.0 | 0.0 | 0.0
Less Deductions | 7.4 | 7.2 | 7.5
Balance at End of Year | 10.9 | 12.8 | 11.9
Insurance Reserves |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 37.6 | 39.0 | 34.6
Additions Charged to Costs and Expenses | 69.7 | 66.9 | 68.2
Other Additions (Deductions) | 0.0 | 0.0 | 0.0
Less Deductions | 66.2 | 68.3 | 63.8
Balance at End of Year | $ 41.1 | $ 37.6 | $ 39.0

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