XML 13 R64.htm IDEA: XBRL DOCUMENT v3.19.2

Taxation - Additional Information (Detail)	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disclosure of income taxes [abstract]
Effective tax rate on profit before taxation	26.90%	16.70%	22.10%
Increase in effective tax rate on profit before taxation	10.20%

X

- Definition

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard
-URIDate 2018-03-16

+ Details

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X

- Definition

Disclosure of income taxes.

+ References

No definition available.

+ Details

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X

- Definition

Increase (decrease) in average effective tax rate

+ References

No definition available.

+ Details

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Namespace Prefix:	wpp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration