Profit Or Loss [Abstract]

Close Brothers Group PLC - Filing #1960465

Concept	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	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31	2021-08-01 to 2022-07-31
Profit or loss [abstract]
Profit (loss) [abstract]
Other income	—	114,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	106,100,000 GBP	—	—	—
Profit (loss) before tax	—	112,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	232,800,000 GBP	—	—	—
Tax expense (income)	—	30,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	67,600,000 GBP	—	—	—
Profit (loss)	– GBP	81,100,000 GBP	– GBP	81,100,000 GBP	– GBP	– GBP	81,100,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	165,200,000 GBP	– GBP	165,200,000 GBP	165,200,000 GBP
Profit (loss), attributable to [abstract]
Profit (loss), attributable to owners of parent	—	81,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	165,200,000 GBP	—	—	—
Earnings per share [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Earnings per share [abstract]
Earnings per share [line items]
Basic earnings per share [abstract]
Basic earnings (loss) per share	—	0.543	—	—	—	—	—	—	—	—	—	—	—	—	1.104	—	—	—
Diluted earnings per share [abstract]
Diluted earnings (loss) per share	—	0.542	—	—	—	—	—	—	—	—	—	—	—	—	1.099	—	—	—