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v3.21.2

Going concern and liquidity risk - Additional Information (Detail) | 3 Months Ended
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Jun. 30, 2021
Going Concern And Liquidity Risk [Line Items] |
Maximum percentage of decline in revenue less pass-through costs to still meet liabilities as they fall due | 29.00%

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

X
- Definition Maximum Percentage of Decline in Revenue Less Pass-Through Costs To Still Meet Liabilities As They Fall Due + References No definition available. + Details
Name: | wpp_MaximumPercentageOfRevenueLessPassThroughCostsDeclineToCoverLiabilities
Namespace Prefix: | wpp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration