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Bank overdrafts, bonds and bank loans - Corporate Bonds and Bank Loans Amounts Falling Due After More Than One Year (Detail) - GBP (£) £ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of bank overdraft bonds and bank loans [abstract] |  |
Non-current portion of non-current borrowings | £ 4,047.3 | £ 5,634.8

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- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + 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_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Disclosure of bank overdraft bonds and bank loans. + References No definition available. + Details
Name: | wpp_DisclosureOfBankOverdraftBondsAndBankLoansAbstract
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration