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Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Allowance For Credit Losses |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 12.0 | $ 12.3 | $ 10.9
"Additions/ (Reductions)" to Costs and Expenses | (1.8) | 2.5 | 7.5
"Other" Additions (Deductions) | 0.0 | 0.0 | 0.0
"Less" Deductions | 1.9 | 2.8 | 6.1
Balance at End of Year | 8.3 | 12.0 | 12.3
Insurance Reserves |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 35.7 | 41.0 | 41.1
"Additions/ (Reductions)" to Costs and Expenses | 78.2 | 78.6 | 72.1
"Other" Additions (Deductions) | 0.0 | 0.0 | 0.0
"Less" Deductions | 73.5 | 83.9 | 72.2
Balance at End of Year | $ 40.4 | $ 35.7 | $ 41.0

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