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Leases - Additional Information (Details) - GBP (£) £ in Millions	Dec. 31, 2024	Dec. 31, 2023
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

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No definition available.

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

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- Definition

Unrecorded Unconditional Purchase Obligation1

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No definition available.

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Name:	wpp_UnrecordedUnconditionalPurchaseObligation1
Namespace Prefix:	wpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant