XML 190 R178.htm IDEA: XBRL DOCUMENT
v3.20.4

Authorised and issued share capital - Options Granted, WPP Worldwide Share Ownership Program (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 shares ADRs £ / shares $ / ADRs | Dec. 31, 2018 shares
Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 25,105,815 | 24,218,615
WPP Worldwide Share Ownership Program [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 4,701,924 | 5,520,774
WPP Worldwide Share Ownership Program [member] | Exercise price group 1 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 82,650 |
Exercise price per share | £ / shares | £ 6.268 |
Exercise dates | 2014 - 2021 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 1 [member] | American depository receipts [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ADRs under option | ADRs | 24,550 |
Exercise dates | 2014 - 2021 |
Exercise price per ADR | $ / ADRs | 49.230 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 2 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 36,500 |
Exercise price per share | £ / shares | £ 6.268 |
Exercise dates | 2015 - 2021 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 2 [member] | American depository receipts [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ADRs under option | ADRs | 16,530 |
Exercise dates | 2013 - 2020 |
Exercise price per ADR | $ / ADRs | 56.560 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 3 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 53,150 |
Exercise price per share | £ / shares | £ 7.113 |
Exercise dates | 2013 - 2020 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 3 [member] | American depository receipts [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ADRs under option | ADRs | 39,184 |
Exercise dates | 2015 - 2022 |
Exercise price per ADR | $ / ADRs | 67.490 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 4 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 25,750 |
Exercise price per share | £ / shares | £ 7.113 |
Exercise dates | 2014 - 2020 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 4 [member] | American depository receipts [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ADRs under option | ADRs | 166,655 |
Exercise dates | 2017 - 2024 |
Exercise price per ADR | $ / ADRs | 102.670 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 5 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 194,079 |
Exercise price per share | £ / shares | £ 8.458 |
Exercise dates | 2015 - 2022 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 5 [member] | American depository receipts [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ADRs under option | ADRs | 141,935 |
Exercise dates | 2016 - 2023 |
Exercise price per ADR | $ / ADRs | 110.760 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 6 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 43,000 |
Exercise price per share | £ / shares | £ 13.145 |
Exercise dates | 2017 - 2021 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 7 [member] | Ordinary shares [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 1,739,050 |
Exercise price per share | £ / shares | £ 13.145 |
Exercise dates | 2017 - 2024 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 8 [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 4,375 |
Exercise price per share | £ / shares | £ 13.145 |
Exercise dates | 2018 - 2024 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 9 [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 564,975 |
Exercise price per share | £ / shares | £ 13.505 |
Exercise dates | 2016 - 2023 |
WPP Worldwide Share Ownership Program [member] | Exercise price group 10 [member] |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |
Number of ordinary shares under option | 14,125 |
Exercise price per share | £ / shares | £ 13.505 |
Exercise dates | 2017 - 2023 |

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_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The exercise price of outstanding share options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_d&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ExercisePriceOfOutstandingShareOptions2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_d&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfOutstandingShareOptions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise date range of ADR-based payment arrangement. + References No definition available. + Details
Name: | wpp_ExerciseDateRangeOfADRBasedPaymentArrangement
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise date range of share-based payment arrangement + References No definition available. + Details
Name: | wpp_ExerciseDateRangeOfSharebasedPaymentArrangement
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise Price Of Outstanding ADR Option. + References No definition available. + Details
Name: | wpp_ExercisePriceOfOutstandingAdrOption
Namespace Prefix: | wpp_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of ADR options outstanding in a share-based payment arrangement. Each ADR represents five Ordinary Shares. + References No definition available. + Details
Name: | wpp_NumberOfOutstandingADROptions
Namespace Prefix: | wpp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=wpp_WPPWorldwideShareOwnershipProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=wpp_AmericanDepositoryReceiptsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis=wpp_ExercisePriceTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |