XML 116 R99.htm IDEA: XBRL DOCUMENT v3.20.4

Segment Information (Narrative) (Details) - 12 months ended Dec. 31, 2020	rigs floater drillship	jackup	drillship	Total	contract
Segment Reporting Information [Line Items]
Number of operating segments | drillship	4
Number of contract drilling rigs	61
Number of jackups leased by ARO		9	9
Number of drilling management contracts | contract					2
Total number of contract drilling rigs	61
Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	16
Floaters [Member] | Ultra Deepwater Drillships [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs | floater	11
Floaters [Member] | Dynamically Positioned Semisubmersible [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs | floater	4
Floaters [Member] | Moored Semisubmersible Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs | floater	1
Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	36
ARO
Segment Reporting Information [Line Items]
Number of contract drilling rigs | floater	7
Total number of contract drilling rigs	7
Jackup Rigs Member [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs | drillship	36
Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs				9

X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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

Number Of Contract Drilling Rig

+ References

No definition available.

+ Details

Name:	val_NumberOfContractDrillingRigs
Namespace Prefix:	val_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of Drilling Management Contracts

+ References

No definition available.

+ Details

Name:	val_NumberOfDrillingManagementContracts
Namespace Prefix:	val_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of jackups leased by ARO

+ References

No definition available.

+ Details

Name:	val_NumberofjackupsleasedbyARO
Namespace Prefix:	val_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Total Number Of Contract Drilling Rigs

+ References

No definition available.

+ Details

Name:	val_TotalNumberOfContractDrillingRigs
Namespace Prefix:	val_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=val_FloatersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=val_UltraDeepwaterDrillshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=val_DynamicallyPositionedSemisubmersibleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=val_MooredSemisubmersibleRigsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=val_JackupsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=val_AROMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=val_JackupRigsMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=val_JackupRigsDeployedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: