Statement Of Changes In Equity [Abstract]

WPP PLC - Filing #1592573

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Decrease (increase) through tax on share-based payment transactions, equity	− GBP	− GBP	− GBP	− GBP	− GBP	15. 4 GBP	15. 4 GBP	15. 4 GBP	—	—	—	—	—	—	—	—
Cancellation of treasury shares	− GBP	− GBP	− GBP	7. 2 GBP	7. 2 GBP	7 2 9. 3 GBP	7 2 9. 3 GBP	7 2 9. 3 GBP	281. 2 GBP	3. 2 GBP	281,200,000 GBP	– GBP	− GBP	281,200,000 GBP	– GBP	3,200,000 GBP