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SCHEDULE II NATIONAL OILWELL VARCO, INC. VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2012
SCHEDULE II NATIONAL OILWELL VARCO, INC. VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II NATIONAL OILWELL VARCO, INC. VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2012, 2011 and 2010 (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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  | $ | 107 |  |  | $ | 6 |  |  | $ | 7 |  |  | $ | 120 |
2011 |  |  | 107 |  |  |  | 9 |  |  |  | (9 | ) |  |  | 107 |
2010 |  |  | 95 |  |  |  | 39 |  |  |  | (27 | ) |  |  | 107 |
Allowance for excess and obsolete inventories: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  | $ | 281 |  |  | $ | 99 |  |  | $ | (42 | ) |  | $ | 338 |
2011 |  |  | 270 |  |  |  | 70 |  |  |  | (59 | ) |  |  | 281 |
2010 |  |  | 206 |  |  |  | 106 |  |  |  | (42 | ) |  |  | 270 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  | $ | 13 |  |  | $ | 80 |  |  | $ | — |  |  | $ | 93 |
2011 |  |  | 9 |  |  |  | 4 |  |  |  | — |  |  |  | 13 |
2010 |  |  | 8 |  |  |  | 1 |  |  |  | — |  |  |  | 9 |
Warranty reserve: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  | $ | 211 |  |  | $ | 51 |  |  | $ | (68 | ) |  | $ | 194 |
2011 |  |  | 215 |  |  |  | 40 |  |  |  | (44 | ) |  |  | 211 |
2010 |  |  | 217 |  |  |  | 52 |  |  |  | (54 | ) |  |  | 215 |

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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Data Type: | nonnum:textBlockItemType
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Period Type: | duration