Statement Of Comprehensive Income [Abstract]

3i Group PLC - Filing #5974679

Concept	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31
Statement of comprehensive income [abstract]
Profit (loss)	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	4,535,000,000 GBP	5,038,000,000 GBP	503,000,000 GBP	– GBP	– GBP	3,309,000,000 GBP	– GBP	527,000,000 GBP	3,836,000,000 GBP	– GBP	– GBP	– GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	4,000,000 GBP	4,000,000 GBP	– GBP	– GBP	– GBP	7,000,000 GBP	– GBP	– GBP	7,000,000 GBP	– GBP	– GBP	– GBP
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	– GBP	– GBP	– GBP	7,000,000 GBP	– GBP	– GBP	– GBP	7,000,000 GBP	– GBP	4,000,000 GBP	– GBP	– GBP	– GBP	– GBP	4,000,000 GBP	– GBP	– GBP	– GBP
Other comprehensive income	—	—	—	—	—	—	—	11,000,000 GBP	—	—	—	—	—	—	3,000,000 GBP	—	—	—
Comprehensive income	– GBP	– GBP	– GBP	7,000,000 GBP	– GBP	– GBP	4,539,000,000 GBP	5,049,000,000 GBP	503,000,000 GBP	4,000,000 GBP	– GBP	3,316,000,000 GBP	– GBP	527,000,000 GBP	3,839,000,000 GBP	– GBP	– GBP	– GBP