XML 56 R44.htm IDEA: XBRL DOCUMENT v3.21.1

Subsequent Events - Additional Information (Detail) $ in Millions	Apr. 01, 2021 USD ($)
Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price consideration	$ 90

X

- Definition

Net purchase price.

+ References

No definition available.

+ Details

Name:	dnow_NetPurchasePrice
Namespace Prefix:	dnow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: