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v3.21.2

Trade and other receivables - Additional Information (Detail) - GBP (£) £ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Allowance for bad and doubtful debts as a percentage of gross trade accounts receivables | 1.40% |  | 1.70%
Trade receivables [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Credit to bad debt expense | £ 10.6 |  |
Bad debt expenses |  | £ 29.2 | £ 40.8

X
- Definition Allowance for bad and doubtful debts percentage. + References No definition available. + Details
Name: | wpp_AllowanceForBadAndDoubtfulDebtsPercentage
Namespace Prefix: | wpp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Bad debt expense. + References No definition available. + Details
Name: | wpp_BadDebtExpense
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Credit to bad debt expense. + References No definition available. + Details
Name: | wpp_CreditToBadDebtExpense
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disclosure of detailed information about financial instruments. + References No definition available. + Details
Name: | wpp_DisclosureOfDetailedInformationAboutFinancialInstrumentLineItems
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_TradeReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |