XML 162 R125.htm IDEA: XBRL DOCUMENT v3.19.1

Trade and other receivables - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Trade and other receivables [abstract]
Allowance for bad and doubtful debts as a percentage of gross trade accounts receivables	1.40%	1.10%	1.20%

X

- References

No definition available.

+ Details

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

X

- Definition

Allowance for bad and doubtful debts percentage.

+ References

No definition available.

+ Details

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