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Cash and cash equivalents and debt financing - Additional information (Detail) - GBP (£) £ in Millions	Jun. 30, 2023	Dec. 31, 2022
Corporate bond [member]
Cash Reconciliation [Line Items]
Fair value of corporate bonds	£ 4,565.0	£ 4,049.1

X

- Definition

The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_FinancialLiabilitiesAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Cash Reconciliation

+ References

No definition available.

+ Details

Name:	wpp_CashReconciliationLineItems
Namespace Prefix:	wpp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=wpp_CorporateBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: