Significant Accounting Policies (Details) - Schedule of condensed balance sheets are reconciled	3 Months Ended
Mar. 31, 2022 USD ($)
Schedule of condensed balance sheets are reconciled [Abstract]
Gross proceeds	$ 345,000,000
Less:
Proceeds allocated to public warrants	(11,960,000)
Issuance costs related to Class A ordinary shares	(19,450,398)
Plus:
Accretion of carrying value to redemption value	31,410,398
Contingently redeemable Class A ordinary shares	$ 345,000,000

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

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

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

+ Details

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

- References

No definition available.

+ Details

Name:	wald_AccretionOfCarryingValueToRedemptionValue
Namespace Prefix:	wald_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

No definition available.

+ Details

Name:	wald_ContingentlyRedeemableClassAOrdinaryShares
Namespace Prefix:	wald_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

No definition available.

+ Details

Name:	wald_IssuanceCostsRelatedToClassAOrdinaryShares
Namespace Prefix:	wald_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	wald_LessAbstract
Namespace Prefix:	wald_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	wald_PlusAbstract
Namespace Prefix:	wald_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	wald_ScheduleOfCondensedBalanceSheetsAreReconciledAbstract
Namespace Prefix:	wald_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration