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Interests in associates, joint ventures and other investments - Additional Information (Details) - GBP (£) £ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Kantar US
Disclosure of principal associates and joint ventures [line items]
Cumulative share of unrecognised losses	£ 57	£ 30	£ 30
ROW Chain
Disclosure of principal associates and joint ventures [line items]
Cumulative share of unrecognised losses	£ 196	£ 138	£ 34

X

- Definition

The cumulative amount of the unrecognised share of losses of associates if the entity has stopped recognising its share of losses when applying the equity method. [Refer: Total for all associates [member]; Unrecognised share of losses of associates]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 22
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_22_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

Disclosure of principal associates and joint ventures.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=wpp_KantarUSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=wpp_ROWChainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: