Statement Of Changes In Equity [Abstract]

Rentokil Initial PLC - Filing #2010974

Concept	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	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	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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Dividends recognised as distributions to owners of parent	201,000,000 GBP	– GBP	– GBP	201,000,000 GBP	– GBP	– GBP	– GBP	– GBP	122,000,000 GBP	122,000,000 GBP	– GBP	—	—	—	—	—	– GBP	—	– GBP	—	—	—	– GBP	—	– GBP	—	—	– GBP	139,000,000 GBP	139,000,000 GBP
Increase (decrease) through transfer to statutory reserve, equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	– GBP	– GBP	– GBP	10,000,000 GBP	10,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	10,000,000 GBP
Increase (decrease) through exercise of options, equity	5,000,000 GBP	– GBP	– GBP	– GBP	5,000,000 GBP	– GBP	– GBP	– GBP	2,000,000 GBP	– GBP	– GBP	—	—	—	—	—	2,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—
Decrease (increase) through tax on share-based payment transactions, equity	—	—	—	—	—	—	– GBP	– GBP	2,000,000 GBP	2,000,000 GBP	– GBP	—	—	—	—	—	– GBP	—	– GBP	—	—	—	– GBP	—	– GBP	—	—	– GBP	5,000,000 GBP	5,000,000 GBP
Share issue related cost	—	—	—	—	—	—	– GBP	16,000,000 GBP	16,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	16,000,000 GBP	– GBP	– GBP	—	—	—	—	—	—	—	—	—	—	—	—