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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	Dec. 31, 2017
Disclosure of bank overdraft bonds and bank loans [abstract]
Non-current portion of non-current borrowings	[1]	£ 4,047.3	£ 5,634.8	£ 6,250.4
[1] Figures have been restated, as described in the accounting policies.

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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

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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