XML 66 R95.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Dec. 31, 2019 rigs
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	79
Held-for-sale
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	3
Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	27
Floaters [Member] | Held-for-sale
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	1
Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	43
Jackups [Member] | Held-for-sale
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	9
Other [Member] | Held-for-sale
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	7
ARO | Held-for-sale
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
North & South America (Excluding Brazil) [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	18
North & South America (Excluding Brazil) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	10
North & South America (Excluding Brazil) [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8
North & South America (Excluding Brazil) [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
North & South America (Excluding Brazil) [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	21
Europe & Mediterranean [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	7
Europe & Mediterranean [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	14
Europe & Mediterranean [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Europe & Mediterranean [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Middle East & Africa [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	25
Middle East & Africa [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Middle East & Africa [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	12
Middle East & Africa [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	9
Middle East & Africa [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	7
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	10
Asia Pacific [Member] | Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Asia Pacific [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	3
Asia Pacific [Member] | Floaters [Member] | Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Asia Pacific [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	7
Asia Pacific [Member] | Jackups [Member] | Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member] | Other [Member] | Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member] | ARO | Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0

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

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_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap_MiddleEastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=srt_AsiaPacificMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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