XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.25.2

Segments - Business Segments (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Other items | $ 19 | $ (118) | $ 32 | $ (121)
Cost of Revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 15 | (118) | 23 | (121)
Selling, General and Administrative [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 4 |  | 9 |
Severance and Other Restructuring Costs [Member] | Cost of Revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 15 |  | 23 |
Energy Products and Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 6 | 1 | 11 | 1
Energy Products and Services [Member] | Cost of Revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 6 | 1 | 10 | 1
Energy Products and Services [Member] | Selling, General and Administrative [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items |  |  | 1 |
Energy Equipment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 9 | (119) | 12 | (123)
Energy Equipment [Member] | Cost of Revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 9 | $ (119) | 12 | (123)
Corporate [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | 4 |  | 9 | 1
Corporate [Member] | Cost of Revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items |  |  | 1 | $ 1
Corporate [Member] | Selling, General and Administrative [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other items | $ 4 |  | $ 8 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of other expense (income) and loss (gain) calculated as difference between segment revenue and separately disclosed expense category to arrive at segment profit (loss). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26C -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26B -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B + Details
Name: | us-gaap_SegmentReportingOtherItemAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=nov_SeveranceAndFacilityClosuresCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nov_EnergyProductsAndServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nov_EnergyEquipmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |