XML 50 R75.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Business Segments - Schedule of Comparison of Approximate Sales Mix in Principal Product Categories (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues | $ 639 | $ 751 | $ 776 | $ 785 | $ 764 | $ 822 | $ 777 | $ 764 | $ 2,951 | $ 3,127 | $ 2,648
Drilling and Production [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 711 | 691 | 625
Pipe [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 473 | 587 | 418
Valves [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 608 | 664 | 541
Fittings and Flanges [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 524 | 523 | 419
Mill Tool, MRO, Safety and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | $ 635 | $ 662 | $ 645

X
- Definition Entity wide portfolio carrying amount major customer. + References No definition available. + Details
Name: | dnow_EntityWidePortfolioCarryingAmountMajorCustomerLineItems
Namespace Prefix: | dnow_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ExplorationAndProductionEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_PipelinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dnow_ValveSystemsAndControlsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dnow_ValvesFittingsFlangesAndAllOtherProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dnow_MillsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |