XML 70 R56.htm IDEA: XBRL DOCUMENT
v3.25.4

Shareholders' Equity Narrative (Details) - USD ($) shares in Millions, $ in Millions | 1 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2025
Shareholders' Equity Note [Abstract] |  |
Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation | 600.0 |
Share Repurchase Program, Remaining Authorized, Amount |  | $ 175.0

X
- Definition Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares of common stock subject to repurchase or cancellation determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. Common stock subject to repurchase are outstanding common shares that are contingently returnable (that is, subject to recall). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-13 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shareholders' Equity Note [Abstract] + References No definition available. + Details
Name: | val_ShareholdersEquityNoteAbstract
Namespace Prefix: | val_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration