XML 38 R25.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2016
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) | The components of accumulated other comprehensive income (loss) are as follows (in millions):
|  | Currency Translation Adjustments |  |  | Derivative Financial Instruments, Net of Tax |  |  | Defined Benefit Plans, Net of Tax |  |  | Total |
Balance at December 31, 2015 |  | $ | (1,279 | ) |  | $ | (205 | ) |  | $ | (69 | ) |  | $ | (1,553 | )
Accumulated other comprehensive income (loss) before reclassifications |  |  | 97 |  |  |  | 47 |  |  |  | — |  |  |  | 144 |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | — |  |  |  | 84 |  |  |  | — |  |  |  | 84 |
Balance at June 30, 2016 |  | $ | (1,182 | ) |  | $ | (74 | ) |  | $ | (69 | ) |  | $ | (1,325 | )
Components of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | The components of amounts reclassified from accumulated other comprehensive income (loss) are as follows (in millions):
|  | Three Months Ended June 30, |
|  | 2016 |  |  | 2015 |
|  | Currency Translation Adjustments |  |  | Derivative Financial Instruments |  |  | Defined Benefit Plans |  |  | Total |  |  | Currency Translation Adjustments |  |  | Derivative Financial Instruments |  |  | Defined Benefit Plans |  |  | Total |
Revenue |  | $ | — |  |  | $ | (2 | ) |  | $ | — |  |  | $ | (2 | ) |  | $ | — |  |  | $ | (66 | ) |  | $ | — |  |  | $ | (66 | )
Cost of revenue |  |  | — |  |  |  | 46 |  |  |  | — |  |  |  | 46 |  |  |  | — |  |  |  | 153 |  |  |  | — |  |  |  | 153 |
Tax effect |  |  | — |  |  |  | (12 | ) |  |  | — |  |  |  | (12 | ) |  |  | — |  |  |  | (26 | ) |  |  | — |  |  |  | (26 | )
|  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 61 |  |  | $ | — |  |  | $ | 61 |
|  | Six Months Ended June 30, |
|  | 2016 |  |  | 2015 |
|  | Currency Translation Adjustments |  |  | Derivative Financial Instruments |  |  | Defined Benefit Plans |  |  | Total |  |  | Currency Translation Adjustments |  |  | Derivative Financial Instruments |  |  | Defined Benefit Plans |  |  | Total |
Revenue |  | $ | — |  |  | $ | (3 | ) |  | $ | — |  |  | $ | (3 | ) |  | $ | — |  |  | $ | (1 | ) |  | $ | — |  |  | $ | (1 | )
Cost of revenue |  |  | — |  |  |  | 122 |  |  |  | — |  |  |  | 122 |  |  |  | — |  |  |  | 152 |  |  |  | — |  |  |  | 152 |
Other income (expense), net |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Tax effect |  |  | — |  |  |  | (35 | ) |  |  | — |  |  |  | (35 | ) |  |  | — |  |  |  | (44 | ) |  |  | — |  |  |  | (44 | )
|  | $ | — |  |  | $ | 84 |  |  | $ | — |  |  | $ | 84 |  |  | $ | — |  |  | $ | 107 |  |  | $ | — |  |  | $ | 107 |

X
- Definition Schedule of Reclassifications Out of Accumulated Other Comprehensive Income Loss [Table Text Block] + References No definition available. + Details
Name: | nov_ScheduleOfReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | nov_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration