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Supplementary Data Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts (Tables) | 12 Months Ended
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Dec. 31, 2020
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract] |
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable | Valuation and Qualifying Accounts – Accounts Receivable, Allowance for Expected Credit Losses
| Years ended December 31,
| 2020 |  | 2019 |  | 2018
Balance at beginning of period | $ | 40.2 |  |  | $ | 42.5 |  |  | $ | 42.7 |
Cumulative effect of accounting change 1 | 9.0 |  |  | N/A |  | N/A
Charges to costs and expenses | 50.5 |  |  | 10.1 |  |  | 6.5 |
Adjustments: |  |  |  |  |
Acquisitions/(dispositions) | 8.6 |  |  | (0.3) |  |  | 2.2 |
Uncollectible accounts written off | (11.2) |  |  | (11.9) |  |  | (7.1) |
Recoveries | 0.2 |  |  | N/A |  | N/A
Foreign currency translation adjustments | 1.0 |  |  | (0.2) |  |  | (1.8) |
Balance at end of period | $ | 98.3 |  |  | $ | 40.2 |  |  | $ | 42.5 |

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- Definition Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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