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Schedule II - Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Summary of Allowance for Doubtful Accounts and Revenue Adjustments [Table Text Block] |
Allowance for Doubtful Accounts and Other Receivables for the Years Ended: |  | Balance at Beginning of Year |  |  | Charged to Expense |  |  | Write-Offs, Net of Recoveries |  |  | Balance at End of Year |
December 31, 2019 |  | $ | 23.9 |  |  | $ | 2.8 |  |  | $ | (13.4 | ) |  | $ | 13.3 |
December 31, 2020 |  |  | 13.3 |  |  |  | 5.6 |  |  |  | (0.5 | ) |  |  | 18.4 |
December 31, 2021 |  |  | 18.4 |  |  |  | 2.6 |  |  |  | (4.2 | ) |  |  | 16.8 |

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