XML 81 R142.htm IDEA: XBRL DOCUMENT
v3.20.1

Trade and Other Payables - Additional Information (Detail) - GBP (£) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Bottom of range [member] | Earnout agreements for acquisitions completed in the current year [member] |  |
Disclosure of trade and other payables [line items] |  |
Potential undiscounted amount of future payments | £ 0 | £ 0
Bottom of range [member] | All earn-out agreements [member] |  |
Disclosure of trade and other payables [line items] |  |
Potential undiscounted amount of future payments | 0 | 0
Top of range [member] | Earnout agreements for acquisitions completed in the current year [member] |  |
Disclosure of trade and other payables [line items] |  |
Potential undiscounted amount of future payments | 14,000,000 | 179,000,000
Top of range [member] | All earn-out agreements [member] |  |
Disclosure of trade and other payables [line items] |  |
Potential undiscounted amount of future payments | £ 1,110,000,000 | £ 1,960,000,000

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with disclosure of trade and other payables. + References No definition available. + Details
Name: | wpp_DisclosureOfTradeAndOtherPayablesLineItems
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated financial effect, contingent consideration in business combination. + References No definition available. + Details
Name: | wpp_EstimatedFinancialEffectContingentConsiderationInBusinessCombination
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ItemsOfContingentLiabilitiesAxis=wpp_EarnoutAgreementsInThePeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ItemsOfContingentLiabilitiesAxis=wpp_EarnoutAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |