XML 70 R54.htm IDEA: XBRL DOCUMENT v3.22.0.1

Goodwill and Intangible Assets - Identified Intangible Assets, by Major Classification (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	$ 1,068	$ 1,055
Accumulated Amortization	(565)	(528)
Net Book Value	503	527	$ 852
Indefinite-lived Trade Names [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	196	196
Net Book Value	196	196
Customer Relationships [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	471	475
Accumulated Amortization	(323)	(300)
Net Book Value	148	175
Trademarks [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	174	175
Accumulated Amortization	(122)	(116)
Net Book Value	52	59
Patents [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	145	115
Accumulated Amortization	(59)	(53)
Net Book Value	86	62
Other [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	82	94
Accumulated Amortization	(61)	(59)
Net Book Value	$ 21	$ 35

X

- Definition

Intangible Assets Net Excluding Goodwill.

+ References

No definition available.

+ Details

Name:	nov_IntangibleAssetsNetExcludingGoodwillLineItems
Namespace Prefix:	nov_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

+ Details

Name:	us-gaap_IntangibleAssetsGrossExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

+ Details

Name:	us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=nov_OtherFiniteLivedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: