XML 67 R55.htm IDEA: XBRL DOCUMENT v3.21.1

Earnings Per Share (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
	Aug. 18, 2020	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		$ (910.0)	$ (3,000.0)
Income (Loss) from Continuing Operations Attributable to Parent, Available to Common Stockholders		$ (910.0)	$ (3,000.0)
Antidilutive share options excluded from computation of diluted earnings per share (in shares)		300,000	400,000
Holders Of Equity Interests
Restructuring Cost and Reserve [Line Items]
Warrants term	7 years
Warrants for new equity	7.00%
Senior Noteholders
Restructuring Cost and Reserve [Line Items]
Recovery of claims	100.00%

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount after tax of income (loss) from continuing operations attributable to the parent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4613673-111683

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.13)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Income (Loss) from Continuing Operations Attributable to Parent, Available to Common Stockholders

+ References

No definition available.

+ Details

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

X

- Definition

Plan Of Reorganization, Recovery Of Claims, Percentage

+ References

No definition available.

+ Details

Name:	val_PlanOfReorganizationRecoveryOfClaimsPercentage
Namespace Prefix:	val_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Plan Of Reorganization, Warrants For New Equity

+ References

No definition available.

+ Details

Name:	val_PlanOfReorganizationWarrantsForNewEquity
Namespace Prefix:	val_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Plan Of Reorganization, Warrants Term

+ References

No definition available.

+ Details

Name:	val_PlanOfReorganizationWarrantsTerm
Namespace Prefix:	val_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	val_PlanOfReorganizationParticipantsAxis=val_HoldersOfEquityInterestsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	val_PlanOfReorganizationParticipantsAxis=val_SeniorNoteholdersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: