Statement Of Changes In Equity [Abstract]

Close Brothers Group PLC - Filing #1960467

Concept	As at 2023-07-31	As at 2023-07-31	2022-08-01 to 2023-07-31	2022-08-01 to 2023-07-31	As at 2023-07-31	As at 2023-07-31	2022-08-01 to 2023-07-31	As at 2023-07-31	As at 2023-07-31	2022-08-01 to 2023-07-31	As at 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	As at 2023-07-31	2022-08-01 to 2023-07-31	As at 2023-07-31	As at 2022-07-31	As at 2022-07-31	As at 2022-07-31	2021-08-01 to 2022-07-31	As at 2022-07-31	2021-08-01 to 2022-07-31	As at 2022-07-31	As at 2022-07-31	2021-08-01 to 2022-07-31	As at 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	As at 2022-07-31	As at 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31	As at 2021-07-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	38,000,000 GBP	1,608,500,000 GBP	—	—	2,700,000 GBP	32,000,000 GBP	—	34,400,000 GBP	1,300,000 GBP	—	1,644,900,000 GBP	—	—	—	—	– GBP	—	1,644,900,000 GBP	38,000,000 GBP	1,628,400,000 GBP	1,657,500,000 GBP	—	1,500,000 GBP	—	21,700,000 GBP	29,200,000 GBP	—	100,000 GBP	—	—	—	1,657,500,000 GBP	– GBP	—	—	—	1,000,000 GBP	1,569,300,000 GBP	800,000 GBP	22,400,000 GBP	300,000 GBP	1,570,300,000 GBP	38,000,000 GBP	1,555,500,000 GBP	1,300,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	– GBP	81,100,000 GBP	—	—	81,100,000 GBP	—	—	– GBP	—	– GBP	81,100,000 GBP	– GBP	– GBP	—	– GBP	—	—	—	—	– GBP	—	165,200,000 GBP	—	—	– GBP	—	– GBP	– GBP	– GBP	—	—	165,200,000 GBP	– GBP	165,200,000 GBP	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	– GBP	4,100,000 GBP	—	—	6,000,000 GBP	—	—	12,700,000 GBP	—	200,000 GBP	6,000,000 GBP	– GBP	2,800,000 GBP	—	– GBP	—	—	—	—	– GBP	—	21,300,000 GBP	—	—	700,000 GBP	—	200,000 GBP	– GBP	22,000,000 GBP	—	—	21,300,000 GBP	– GBP	200,000 GBP	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	– GBP	77,000,000 GBP	—	—	87,100,000 GBP	—	—	12,700,000 GBP	—	200,000 GBP	87,100,000 GBP	– GBP	2,800,000 GBP	—	– GBP	—	—	—	—	– GBP	—	186,500,000 GBP	—	—	700,000 GBP	—	200,000 GBP	– GBP	22,000,000 GBP	—	—	186,500,000 GBP	– GBP	165,400,000 GBP	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	– GBP	99,100,000 GBP	—	—	99,100,000 GBP	—	—	– GBP	—	– GBP	99,100,000 GBP	– GBP	– GBP	—	– GBP	—	—	—	—	– GBP	—	95,500,000 GBP	—	—	– GBP	—	– GBP	– GBP	– GBP	—	—	95,500,000 GBP	– GBP	95,500,000 GBP	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	– GBP	2,300,000 GBP	—	—	1,100,000 GBP	—	—	– GBP	—	– GBP	1,100,000 GBP	3,400,000 GBP	– GBP	—	– GBP	—	—	—	—	1,000,000 GBP	—	1,900,000 GBP	—	—	– GBP	—	– GBP	2,200,000 GBP	– GBP	—	—	2,900,000 GBP	– GBP	4,100,000 GBP	—	—	—	—	—	—	—	—	—