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Schedule II - Schedule of 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 - Schedule of Valuation and Qualifying Accounts |
(in millions) |  |  |  |  |  |  |
Description | Balance January 1, |  | Charged to Expenses |  | Write-offs/ Payments/ Other |  | Balance December 31,
2020 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 14 |  |  | 60 |  |  | (59) |  |  | $ | 15 |
Deferred tax assets—valuation allowance | $ | 70 |  |  | 3 |  |  | (19) |  |  | $ | 54 |
2019 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 7 |  |  | 53 |  |  | (46) |  |  | $ | 14 |
Deferred tax assets—valuation allowance | $ | 66 |  |  | 4 |  |  | — |  |  | $ | 70 |
2018 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 10 |  |  | 51 |  |  | (54) |  |  | $ | 7 |
Deferred tax assets—valuation allowance | $ | 53 |  |  | 13 |  |  | — |  |  | $ | 66 |

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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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