XML 73 R104.htm IDEA: XBRL DOCUMENT
v3.20.1

Sources of finance - Analysis of Fixed and Floating Rate Debt by Currency (Detail) € in Millions, £ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 GBP (£) | Dec. 31, 2018 GBP (£) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€)
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 4,272.9 | £ 6,217.9 |  |
US Dollar bonds [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings | $ |  |  |  | $ 1,563 |
US Dollar bonds [member] | Fixed interest rate [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 1,178.2 | £ 1,154.8 |  |
Fixed rate | [1] | 4.06% | 4.58% | 4.06% | 4.06%
Period (months) | [1] | 95 months | 181 months |  |
US Dollar bonds [member] | Floating interest rate [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  |  | £ 1,029.6 |  |
Floating basis |  |  | LIBOR |  |
Sterling bonds [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 400.0 |  |  |
Sterling bonds [member] | Fixed interest rate [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 844.1 | £ 1,044.1 |  |
Fixed rate | [1] | 2.73% | 3.43% | 2.73% | 2.73%
Period (months) | [1] | 188 months | 232 months |  |
Eurobonds [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings | € |  |  |  |  | € 3,100
Eurobonds [member] | Fixed interest rate [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 1,777.7 | £ 2,425.9 |  |
Fixed rate | [1] | 2.34% | 1.99% | 2.34% | 2.34%
Period (months) | [1] | 82 months | 75 months |  |
Eurobonds [member] | Floating interest rate [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 423.3 | £ 449.2 |  |
Floating basis |  | EURIBOR | EURIBOR |  |
Period (months) | [1] | 16 months |  |  |
Other bonds [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Borrowings |  | £ 49.6 | £ 114.3 |  |
[1] | Weighted average. These rates do not include the effect of gains on interest rate swap terminations that are written to income over the life of the original instrument.

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Average debt financing period. + References No definition available. + Details
Name: | wpp_DebtPeriod
Namespace Prefix: | wpp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=wpp_USDollarBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=wpp_SterlingBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=wpp_EurobondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=wpp_OtherBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |