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Cover Page
6 Months Ended
Jun. 30, 2021
Entity Information [Line Items]  
Document Type 6-K
Amendment Flag false
Document Period End Date Jun. 30, 2021
Document Fiscal Year Focus 2021
Document Fiscal Period Focus Q2
Entity Registrant Name WPP PLC
Entity Central Index Key 0000806968
Current Fiscal Year End Date --12-31