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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 (in millions)
|  |  | Additions |  |  |  |
| Balance at Beginning of Period |  | Charges to Cost and Expense |  | Other Additions |  | (Deductions) |  | Balance at End of Period
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |
Allowance for credit losses | $ | 10.1 |  | $ | 12.1 |  | (a) | $ | — |  |  | $ | (1.7) |  | (b) | $ | 20.5 |
Allowance for unbilled receivables | 31.3 |  | 38.5 | (a) | — |  | (39.4) |  | (b) | 30.4 |
Valuation allowance for inventory | 7.7 |  | 1.8 | (c) | — |  | (1.0) |  | (d) | 8.5 |
Valuation allowance for deferred tax assets | 48.8 |  | 6.8 | (e) | — |  | (9.8) |  | (f) | 45.8 |
Total | $ | 97.9 |  | $ | 59.2 |  | $ | — |  | $ | (51.9) |  |  | $ | 105.2
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |
Allowance for credit losses | $ | 16.3 |  | $ | 1.7 | (a) | $ | — |  | $ | (7.9) |  | (b) | $ | 10.1 |
Allowance for unbilled receivables | 22.0 |  | 49.7 | (a) | — |  | (40.4) |  | (b) | 31.3 |
Valuation allowance for inventory | 7.8 |  | 2.1 | (c) | — |  | (2.2) |  | (d) | 7.7 |
Valuation allowance for deferred tax assets | 40.6 |  | 8.2 | (e) | — |  | — |  |  | 48.8 |
Total | $ | 86.7 |  | $ | 61.7 |  | $ | — |  | $ | (50.5) |  |  | $ | 97.9 |
Year ended December 31, 2018 |  |  |  |  |  |  |  |  |
Allowance for credit losses | $ | 8.2 |  | $ | 8.6 | (a) | $ | — |  | $ | (0.5) |  | (b) | $ | 16.3 |
Allowance for unbilled receivables | 27.2 |  | 33.0 | (a) | — |  | (38.2) |  | (b) | 22.0 |
Valuation allowance for inventory | 7.7 |  | 1.1 | (c) | — |  | (1.0) |  | (d) | 7.8 |
Valuation allowance for deferred tax assets | 40.5 |  | 0.1 | (e) | — |  | — |  |  | 40.6 |
Total | $ | 83.6 |  | $ | 42.8 |  | $ | — |  | $ | (39.7) |  |  | $ | 86.7 |
(a) Provisions for receivables. (b) Write-offs of and reversals for receivables. (c) Provisions for obsolete inventory and other adjustments to net realizable value. (d) Inventory write-offs. (e) Additions related to federal, foreign and state attributes. (f) Deductions related to federal, foreign and state attributes.

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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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