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Transactions - Schedule of Reconciliation of the Fair Value of the Acquisition Related Contingent Consideration Liabilities (Parenthetical) (Details) | Dec. 31, 2022
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Business Combinations [Abstract] |
Fair value discount rate | 14.00%

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- Definition Business combination, contingent consideration, liability, discount rate. + References No definition available. + Details
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Namespace Prefix: | dnow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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