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Schedule II National Oilwell Varco, Inc. Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
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, 2016, 2015 and 2014 (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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 209 |  |  | $ | 6 |  |  | $ | (28 | ) |  | $ | 187 |
2016 |  |  | 159 |  |  |  | 52 |  |  |  | (2 | ) |  |  | 209 |
2015 |  |  | 125 |  |  |  | 77 |  |  |  | (43 | ) |  |  | 159 |
Reserve for excess and obsolete inventories: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 1,017 |  |  | $ | 114 |  |  | $ | (331 | ) |  | $ | 800 |
2016 |  |  | 500 |  |  |  | 606 |  |  |  | (89 | ) |  |  | 1,017 |
2015 |  |  | 370 |  |  |  | 186 |  |  |  | (56 | ) |  |  | 500 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 544 |  |  | $ | 280 |  |  | $ | 378 |  |  | $ | 1,202 |
2016 |  |  | 63 |  |  |  | 476 |  |  |  | 5 |  |  |  | 544 |
2015 |  |  | 48 |  |  |  | 15 |  |  |  | — |  |  |  | 63 |
Warranty reserve: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 172 |  |  | $ | 46 |  |  | $ | (83 | ) |  | $ | 135 |
2016 |  |  | 244 |  |  |  | 50 |  |  |  | (122 | ) |  |  | 172 |
2015 |  |  | 272 |  |  |  | 92 |  |  |  | (120 | ) |  |  | 244 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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