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Leases - Additional Information (Details) - GBP (£) £ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Leases Disclosure [Abstract] |  |
Future cash flows for leases not yet commenced to which lessee is committed | £ 114 | £ 280

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- Definition Leases Disclosure + References No definition available. + Details
Name: | wpp_LeasesDisclosureAbstract
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Unrecorded Unconditional Purchase Obligation1 + References No definition available. + Details
Name: | wpp_UnrecordedUnconditionalPurchaseObligation1
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant