XML 183 R171.htm IDEA: XBRL DOCUMENT
v3.20.4

Risk management policies - Summary of currency risk (Detail) - Currency risk [member] - GBP (£) £ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Euro [member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Accumulated fair value hedge adjustment on hedged item included in carrying amount, assets | [1] | £ 153.0 | £ 211.4
US dollar [member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Accumulated fair value hedge adjustment on hedged item included in carrying amount, assets | [1] | £ 240.5 | £ 278.1
[1] | Figures have been restated, as described in the accounting policies.

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Losses/Gains resulting from a weakening/strengthening of sterling against major currencies, which would be posted directly to equity. + References No definition available. + Details
Name: | wpp_LossesGainsResultingFromAWeakeningStrengtheningOfSterlingAgainstMajorCurrencies
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |