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Prepaid Expense and Other Assets - Allowance for doubtful accounts (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Balance at beginning of the year	¥ (14,979)	¥ (12,635)
Additions	(1,154)	(965)
Reversals	1,030	42
Write-off	449	184
Balance at end of the year	¥ (14,654)	(14,979)
Impact of adoption of ASC 326
Balance at beginning of the year		¥ 1,605

X

- Definition

The valuation allowance as of the balance sheet date to reduce the gross amount of receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

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

X

- Definition

Amount of expense for expected credit loss on premiums and other receivables.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of reversal of expense for expected credit loss on premiums and other receivables.

+ References

No definition available.

+ Details

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

X

- Definition

Write-off on other receivables.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: