XML 85 R63.htm IDEA: XBRL DOCUMENT
v3.20.2

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details) | Jun. 30, 2020 jackup rigs contract
--- | ---
Segment Reporting Information [Line Items] |
Number of Drilling Management Contracts | contract | 2
Number of contract drilling rigs (in rigs) | 74
Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 25
Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 40
Other |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 9
ARO |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | jackup | 7
North & South America (Excl. Brazil) |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 14
North & South America (Excl. Brazil) | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 7
North & South America (Excl. Brazil) | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 7
Europe & the Mediterranean |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 19
Europe & the Mediterranean | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 5
Europe & the Mediterranean | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 14
Middle East & Africa |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 23
Middle East & Africa | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 2
Middle East & Africa | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 12
Middle East & Africa | Other |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 9
Middle East & Africa | ARO |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | jackup | 7
Asia & Pacific Rim |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 9
Asia & Pacific Rim | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 3
Asia & Pacific Rim | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 6
Work-in-progress | Asia & Pacific Rim |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 2
Work-in-progress | Asia & Pacific Rim | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 2
Work-in-progress | Asia & Pacific Rim | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 0
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 7
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Floaters |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 6
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Jackups |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 1
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Other |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in rigs) | 0
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | ARO |
Segment Reporting Information [Line Items] |
Number of contract drilling rigs (in 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 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 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_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_AsiaMember
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: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |