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Accounts Receivable - Allowance for Credit Losses for Accounts Receivable (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for Credit Loss |  |  |  |
Beginning balance | $ 35.5 | $ 39.4 | $ 27.8 |
Charges to provision for credit losses | 63.7 | 25.9 | 25.1 |
Write-off of uncollectible receivables | (53.7) | (32.2) | (16.2) |
Recoveries of credit losses | 1.0 | 2.4 | 2.9 |
Translation adjustments | (0.3) | 0.0 | (0.1) |
Ending balance | 57.3 | 35.5 | 39.4 |
Cumulative transition adjustment to retained earnings | 1,912.9 | 1,893.9 | 1,831.6 | $ 1,738.0
Retained Earnings |  |  |  |
Allowance for Credit Loss |  |  |  |
Cumulative transition adjustment to retained earnings | 1,836.7 | 1,761.3 | $ 1,606.1 | $ 1,492.8
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for Credit Loss |  |  |  |
Cumulative transition adjustment to retained earnings |  | (11.1) |  |
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings |  |  |  |
Allowance for Credit Loss |  |  |  |
Cumulative transition adjustment to retained earnings |  | (11.1) |  |
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |
Allowance for Credit Loss |  |  |  |
Beginning balance | $ 46.6 |  |  |
Ending balance |  | $ 46.6 |  |

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- Definition Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 + Details
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- Definition Amount of increase in allowance for credit loss on accounts receivable, from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. 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