Statement Of Changes In Equity [Abstract]

Close Brothers Group PLC - Filing #2522031

Concept	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2023-08-01 to 2024-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through exercise of options, equity	4,600,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	4,600,000 GBP	4,600,000 GBP	— GBP	— GBP	5,600,000 GBP	— GBP	— GBP	— GBP	5,600,000 GBP	— GBP	5,600,000 GBP	— GBP
Decrease (increase) through tax on share-based payment transactions, equity	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	100,000 GBP	— GBP	100,000 GBP	— GBP	— GBP	— GBP	100,000 GBP	— GBP
Purchase of treasury shares	3,500,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	3,500,000 GBP	3,500,000 GBP	— GBP	— GBP	5,000,000 GBP	— GBP	— GBP	— GBP	5,000,000 GBP	— GBP	5,000,000 GBP	— GBP