XML 37 R24.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Accrued Liabilities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2016
Payables and Accruals [Abstract] |
Accrued Liabilities | Accrued liabilities consist of (in millions):
|  | September 30, 2016 |  |  | December 31, 2015 |
Customer prepayments and billings |  | $ | 306 |  |  | $ | 426 |
Vendor costs |  |  | 280 |  |  |  | 449 |
Compensation |  |  | 195 |  |  |  | 241 |
Warranty |  |  | 190 |  |  |  | 244 |
Taxes (non-income) |  |  | 148 |  |  |  | 175 |
Insurance |  |  | 94 |  |  |  | 113 |
Commissions |  |  | 57 |  |  |  | 73 |
Fair value of derivative financial instruments |  |  | 43 |  |  |  | 261 |
Interest |  |  | 29 |  |  |  | 8 |
Other |  |  | 286 |  |  |  | 294 |
Total |  | $ | 1,628 |  |  | $ | 2,284 |
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, 2015 |  | $ | 244 |
Net provisions for warranties issued during the year |  |  | 39 |
Amounts incurred |  |  | (94 | )
Currency translation adjustments and other |  |  | 1 |
Balance at September 30, 2016 |  | $ | 190 |

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
- References No definition available. + 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