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Schedule II National Oilwell Varco, Inc. Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2018
Valuation And Qualifying Accounts [Abstract] |
Schedule II National Oilwell Varco, Inc. Valuation and Qualifying Accounts | SCHEDULE II NATIONAL OILWELL VARCO, INC. VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2018, 2017 and 2016 (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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 187 |  |  | $ | 17 |  |  | $ | (43 | ) |  | $ | 161 |
2017 |  |  | 209 |  |  |  | 6 |  |  |  | (28 | ) |  |  | 187 |
2016 |  |  | 159 |  |  |  | 52 |  |  |  | (2 | ) |  |  | 209 |
Reserve for excess and obsolete inventories: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 800 |  |  | $ | 49 |  |  | $ | (205 | ) |  | $ | 644 |
2017 |  |  | 1,017 |  |  |  | 114 |  |  |  | (331 | ) |  |  | 800 |
2016 |  |  | 500 |  |  |  | 606 |  |  |  | (89 | ) |  |  | 1,017 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 1,202 |  |  | $ | 49 |  |  | $ | (296 | ) |  | $ | 955 |
2017 |  |  | 544 |  |  |  | 280 |  |  |  | 378 |  |  |  | 1,202 |
2016 |  |  | 63 |  |  |  | 476 |  |  |  | 5 |  |  |  | 544 |
Warranty reserve: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 135 |  |  | $ | 38 |  |  | $ | (68 | ) |  | $ | 105 |
2017 |  |  | 172 |  |  |  | 46 |  |  |  | (83 | ) |  |  | 135 |
2016 |  |  | 244 |  |  |  | 50 |  |  |  | (122 | ) |  |  | 172 |

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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=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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