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Leases - Additional Information (Details) - GBP (£) £ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases Disclosure [Abstract]
Future cash flows for leases not yet commenced to which lessee is committed	£ 280.0	£ 440.0

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- Definition

Future cash flows for leases not yet commenced to which lessee is committed.

+ References

No definition available.

+ Details

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

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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