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Schedule II Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation And Qualifying Accounts | SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS For the years ended 2020, 2019 and 2018 In millions
Column A | Column B |  | Column C |  | Column D |  | Column E
|  |  | Additions |  |  |  |
Description | Balance Beginning of Period |  | Charges or (Reductions) to Costs and Expenses |  | Charges or (Reductions) to Other Accounts |  | Deductions |  | Balance at End of Period(a)
Allowance for doubtful accounts, deducted from accounts receivable in the balance sheet: |  |  |  |  |  |  |  |  |
Year Ended December 31, 2018 | 15.5 |  |  | — |  |  | 12.0 |  | (b) | (4.1) |  |  | 23.4 |
Year Ended December 31, 2019 | 23.4 |  |  | 4.6 |  |  | (6.8) |  |  | (1.0) |  |  | 20.2 |
Year Ended December 31, 2020 | 20.2 |  |  | 1.3 |  |  | (0.2) |  |  | (4.5) |  |  | 16.8 |
Income tax valuation allowance, related to deferred income taxes |  |  |  |  |  |  |  |  |
Year Ended December 31, 2018 | 584.1 |  |  | 946.4 |  |  | — |  |  | — |  |  | 1,530.5 |
Year Ended December 31, 2019 | 1,530.5 |  |  | (73.4) |  |  | — |  |  | — |  |  | 1,457.1 |
Year Ended December 31, 2020 | 1,457.1 |  |  | (774.1) |  |  | — |  |  | — |  |  | 683.0 |
______________________________ (a)Allowance for doubtful accounts balance includes $16.3 million, $16.7 million, $22.1 million of allowance on long-term receivables recorded in Other Assets for the years ended December 31, 2020, 2019 and 2018, respectively. (b)Amount relates to allowance of $12.0 million acquired in the Acquisition.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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