XML 95 R81.htm IDEA: XBRL DOCUMENT v3.22.4

Income Taxes (Narrative) (Details) $ in Thousands, € in Millions, $ in Millions	3 Months Ended				4 Months Ended	8 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 EUR (€)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 AUD ($)	Apr. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 AUD ($)	Aug. 18, 2020	Apr. 11, 2019 EUR (€)
Investments, Owned, Federal Income Tax Note [Line Items]
Income from continuing operations before income taxes in the U.S. countries					$ 373,100	$ 253,400	$ 39,700			$ (51,000)
Income from continuing operations before income taxes in the non-U.S. countries					4,800,000	240,600	(185,200)			(5,100,000)
Deferred tax assets related to U.S. foreign tax credits						105,700	60,700	$ 105,700
Deferred tax assets related to net operating loss carryforwards						2,297,500	3,028,700	2,297,500
Net operating loss carryforwards							12,900,000
Operating Loss Carryforwards, Limitations on Use							193,400
Operating loss carryforwards, Not subject to expiration							11,800,000
Operating loss carryforwards, Subject to expiration							1,100,000
Valuation allowance on NOL carryforwards and FTC							4,700,000
Income Tax Expense (Benefit), Discrete Item					$ 2,200	$ 14,300	$ 10,300			$ 322,400
Consilidated effective income tax rate excluding discrete items					(12.90%)	213.90%	73.60%			(7.60%)
Total unrecognized tax benefits					$ 235,400	$ 235,100	$ 217,600	235,100		$ 237,700
Amount of unrecognized tax benefits affecting the consolidated effective income tax rate if recognized							183,900
Amount of accrued interest and penalties included in other liabilities						100,500	87,800	100,500
Amount of interest and penalties recognized in net tax expense					13,500	20,300	12,500			13,800
Income tax benefits, inclusive of interest and penalties due to lapses in statute of limitations					200	17,900	4,500	17,900		4,300
Decline in unrecognized tax benefits during next twelve months							50,000
Accrued interest and penalty assessments related to the decline in unrecognized tax benefits							11,400
Aggregate Undistributed Earnings of Subsidiaries to be Continually Reinvested							289,500
Deferred Tax Assets, Gross						3,915,900	4,808,900	3,915,900
Unrecognized Tax Benefits, Period Increase (Decrease)										122,100
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions					0	4,500	1,000
Effective Income Tax Rate Reconciliation, Switzerland Tax Reform, Amount						15,400
Income Tax Examination, Increase (Decrease) in Liability from Prior Year						29,700	17,200	29,700
Income Tax Benefit, Fresh Start Accounting Adjustments					19,300
Change In Liabilities For Unrecognized Tax Benefits					$ 21,500
Deferred Income Taxes and Tax Credits						9,800
Deferred Tax Expense							1,500
Interest limitation carryforwards						74,800	193,400	74,800
Four Point Eight Seven Five Percent Senior Notes Due Twenty Twenty Two [Member] | Senior Notes [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding					4.875%									4.875%
Seven Point Three Seven Five Senior Notes Due Twenty Twenty Five [Member] | Senior Notes [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding					7.375%									7.375%
Five Point Four Zero Percent Senior Notes Due Twenty Forty Two [Member] | Senior Notes [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding					5.40%									5.40%
Four Point Seven Five Percent Senior Notes Due Twenty Twenty Four [Member] | Senior Notes [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding					4.75%									4.75%
Five Point Eight Five Percent Senior Notes Due Twenty Forty Four [Member] | Senior Notes [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding					5.85%									5.85%
Rowan Companies [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Gross										$ 66,000
Rowan Companies [Member] | United States [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards							605,700
Rowan Companies [Member] | LUXEMBOURG
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards							2,100,000
Rowan Companies [Member] | SWITZERLAND
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards							79,200
Rowan Companies [Member] | United Kingdom [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards							$ 56,100
Minimum
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Foreign, Expiration Date							2023
Maximum
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Foreign, Expiration Date							2026
Operating loss carryforwards tax credits expiration year							2040
Interest limitation carryforwards							$ 500
Other Liabilities [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Total unrecognized tax benefits						202,900	187,200	202,900
Other Noncurrent Assets [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Total unrecognized tax benefits						1,000	200	1,000
Other Current Assets [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Total unrecognized tax benefits						$ 31,200	30,200	31,200
Australian Taxation Office [Member] | Rowan Companies [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Unrecognized tax benefit, maximum exposure			$ 29,000								$ 68,800
Tax Assessment Liability							$ 17,800
Tax Assessment				$ 42									$ 101
Luxembourg Inland Revenue [Member] | Rowan Companies [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Income Tax Examination, Estimate of Possible Loss	$ 161,500	€ 142.0									161,500	€ 142.0
Income Tax Examination, Penalties Accrued											$ 105,700				€ 93.0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	2,300	2.0
Luxembourg Inland Revenue [Member] | Rowan Companies [Member] | Uncertain Tax Positions Member
Investments, Owned, Federal Income Tax Note [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	$ 89,800	€ 79.0						$ 15,900	€ 14.0

X

- Definition

Interest rate on outstanding borrowings under debtor-in-possession financing arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=124437977&loc=SL2890576-112764

+ Details

Name:	us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of deferred income tax expense (benefit) and income tax credits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

+ Details

Name:	us-gaap_DeferredIncomeTaxesAndTaxCredits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

+ Details

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

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

+ Details

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

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

+ Details

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

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

+ References

No definition available.

+ Details

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

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

+ References

No definition available.

+ Details

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

X

- Definition

Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

+ Details

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

X

- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.3)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.3)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Estimated amount of loss resulting from an adverse tax position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

Name:	us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount the liability recorded for the income tax examination increased or decreased in the current year/accounting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

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

X

- Definition

The amount of estimated penalties accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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

X

- Definition

The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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

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

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

+ Details

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

X

- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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

X

- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI https://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

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

X

- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

Name:	us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of interest expense accrued for an underpayment of income taxes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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

X

- Definition

Amount of interest expense for an underpayment of income taxes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

Name:	us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

Name:	us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

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

X

- Definition

Aggregate Undistributed Earnings of Subsidiaries to be Continually Reinvested

+ References

No definition available.

+ Details

Name:	val_AggregateUndistributedEarningsofSubsidiariestobeContinuallyReinvested
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Change In Liabilities For Unrecognized Tax Benefits

+ References

No definition available.

+ Details

Name:	val_ChangeInLiabilitiesForUnrecognizedTaxBenefits
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Deferred Tax Assets, Foreign, Expiration Date

+ References

No definition available.

+ Details

Name:	val_DeferredTaxAssetsForeignExpirationDate
Namespace Prefix:	val_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Deferred Tax Expense

+ References

No definition available.

+ Details

Name:	val_DeferredTaxExpense
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Effective Income Tax Rate, Continuing Operations, Excluding Discrete Items

+ References

No definition available.

+ Details

Name:	val_EffectiveIncomeTaxRateContinuingOperationsExcludingDiscreteItems
Namespace Prefix:	val_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Effective Income Tax Rate Reconciliation, Switzerland Tax Reform, Amount

+ References

No definition available.

+ Details

Name:	val_EffectiveIncomeTaxRateReconciliationSwitzerlandTaxReformAmount
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Income Tax Benefit, Fresh Start Accounting Adjustments

+ References

No definition available.

+ Details

Name:	val_IncomeTaxBenefitFreshStartAccountingAdjustments
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Income Tax Expense (Benefit), Discrete Item

+ References

No definition available.

+ Details

Name:	val_IncomeTaxExpenseBenefitDiscreteItem
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Operating Loss Carryforwards, Interest Limitation Carryforwards

+ References

No definition available.

+ Details

Name:	val_OperatingLossCarryforwardsInterestLimitationCarryforwards
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Operating Loss Carryforwards Tax Credits Expiration Dates

+ References

No definition available.

+ Details

Name:	val_OperatingLossCarryforwardsTaxCreditsExpirationDates
Namespace Prefix:	val_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax Assessment

+ References

No definition available.

+ Details

Name:	val_TaxAssessment
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Tax Assessment Liability

+ References

No definition available.

+ Details

Name:	val_TaxAssessmentLiability
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Due to Lapses in Statute of Limitations

+ References

No definition available.

+ Details

Name:	val_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedDueToLapsesInStatuteOfLimitations
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Unrecognized tax benefit, maximum exposure

+ References

No definition available.

+ Details

Name:	val_Unrecognizedtaxbenefitmaximumexposure
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Valuation Allowance On NOL Carryforwards And FTC Due To Uncertainty Of Realization

+ References

No definition available.

+ Details

Name:	val_ValuationAllowanceOnNolCarryforwardsAndFtcDueToUncertaintyOfRealization
Namespace Prefix:	val_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_DebtInstrumentAxis=val_FourPointEightSevenFivePercentSeniorNotesDueTwentyTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=val_SevenPointThreeSevenFiveSeniorNotesDueTwentyTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=val_FivePointFourZeroPercentSeniorNotesDueTwentyFortyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=val_FourPointSevenFivePercentSeniorNotesDueTwentyTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=val_FivePointEightFivePercentSeniorNotesDueTwentyFortyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=val_RowanCompaniesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_AustralianTaxationOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_LuxembourgInlandRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	val_UnrecognizedTaxBenefitsAxisAxis=val_UncertainTaxPositionsMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: