XML 116 R79.htm IDEA: XBRL DOCUMENT v3.19.1

Costs of services and general and administrative costs - Summary of Operating Costs (Parenthetical) (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Analysis of income and expense [abstract]
Other pass-through costs	£ 708.6	£ 558.8	[1]	£ 512.7	[1]
[1] Prior year figures have been restated for the impact of the adoption of IFRS 15 Revenue from Contracts with Customers, as described in the accounting policies.

X

- References

No definition available.

+ Details

Name:	ifrs-full_AnalysisOfIncomeAndExpenseAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Other pass through costs

+ References

No definition available.

+ Details

Name:	wpp_OtherPassThroughCosts
Namespace Prefix:	wpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration