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Schedule II Nov Inc. Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2021
Valuation And Qualifying Accounts [Abstract] |
Schedule II Nov Inc. Valuation and Qualifying Accounts | SCHEDULE II NOV INC. VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2021, 2020 and 2019 (in millions)
|  | Balance beginning of year |  |  | Additions (Deductions) charged to costs and expenses |  |  | Charge off's and other |  |  | Balance end of year |
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | $ | 100 |  |  | $ | 5 |  |  | $ | (17 | ) |  | $ | 88 |
2020 |  |  | 132 |  |  |  | 7 |  |  |  | (39 | ) |  |  | 100 |
2019 |  |  | 161 |  |  |  | 21 |  |  |  | (50 | ) |  |  | 132 |
Reserve for excess and obsolete inventories: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | $ | 577 |  |  | $ | 73 |  |  | $ | (206 | ) |  | $ | 444 |
2020 |  |  | 843 |  |  |  | 367 |  |  |  | (633 | ) |  |  | 577 |
2019 |  |  | 644 |  |  |  | 659 |  |  |  | (460 | ) |  |  | 843 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | $ | 1,093 |  |  | $ | 31 |  |  | $ | 3 |  |  | $ | 1,127 |
2020 |  |  | 1,175 |  |  |  | (83 | ) |  |  | 1 |  |  |  | 1,093 |
2019 |  |  | 955 |  |  |  | 218 |  |  |  | 2 |  |  |  | 1,175 |
Environmental accruals |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | $ | 90 |  |  | $ | 12 |  |  | $ | (24 | ) |  | $ | 78 |
2020 |  |  | 104 |  |  |  | 13 |  |  |  | (27 | ) |  |  | 90 |
2019 |  |  | 66 |  |  |  | 57 |  |  |  | (19 | ) |  |  | 104 |
Warranty reserve: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  | $ | 87 |  |  | $ | 15 |  |  | $ | (29 | ) |  | $ | 73 |
2020 |  |  | 90 |  |  |  | 22 |  |  |  | (25 | ) |  |  | 87 |
2019 |  |  | 105 |  |  |  | 41 |  |  |  | (56 | ) |  |  | 90 |

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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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