XML 22 R25.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Accrued Liabilities (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2014
Payables And Accruals [Abstract] |
Accrued Liabilities | Accrued liabilities consist of (in millions):
|  | March 31, |  |  | December 31, |
|  | 2014 |  |  | 2013 |
Customer prepayments and billings |  | $ | 755 |  |  | $ | 673 |
Accrued vendor costs |  |  | 562 |  |  |  | 531 |
Compensation |  |  | 348 |  |  |  | 516 |
Warranty |  |  | 248 |  |  |  | 228 |
Insurance |  |  | 137 |  |  |  | 131 |
Taxes (non income) |  |  | 128 |  |  |  | 188 |
Accrued Commissions |  |  | 92 |  |  |  | 97 |
Interest |  |  | 30 |  |  |  | 11 |
Fair value of derivatives |  |  | 21 |  |  |  | 31 |
Other |  |  | 396 |  |  |  | 357 |
Total |  | $ | 2,717 |  |  | $ | 2,763 |
Changes in Carrying Amount of Service and Product Warranties | The changes in the carrying amount of service and product warranties are as follows (in millions):
Balance at December 31, 2013 |  | $ | 228 |
Net provisions for warranties issued during the year |  |  | 29 |
Amounts incurred |  |  | (11 | )
Currency translation adjustments and other |  |  | 2 |
Balance at March 31, 2014 |  | $ | 248 |

X
- Definition Schedule Of Product Warranty Table [Text Block] + References No definition available. + Details
Name: | nov_ScheduleOfProductWarrantyTableTextBlock
Namespace Prefix: | nov_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration