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Income Taxes - Summary of movement of valuation allowance (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Taxes
Balance at the beginning of the year	¥ 378,851	¥ 378,815
Additions	54,097	47,941
Reversals	(74,379)	(47,905)
Balance at end of the year	¥ 358,569	¥ 378,851

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Represents the amount of addition in the period in the valuation allowance for a specified deferred tax asset.

+ References

No definition available.

+ Details

Name:	wdh_ValuationAllowanceDeferredTaxAssetAdditionsAmount
Namespace Prefix:	wdh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of valuation allowance of a specified deferred tax asset reversed in the period.

+ References

No definition available.

+ Details

Name:	wdh_ValuationAllowanceDeferredTaxAssetReversalAmount
Namespace Prefix:	wdh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration