Statement Of Comprehensive Income [Abstract]

British Land Co PLC - Filing #6120680

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	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	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31
Statement of comprehensive income [abstract]
Profit (loss)	– GBP	338,000,000 GBP	63,000,000 GBP	275,000,000 GBP	338,000,000 GBP	338,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	265,000,000 GBP	266,000,000 GBP	1,000,000 GBP	– GBP	1,000,000 GBP	– GBP	– GBP	– GBP	1,000,000 GBP	2,000,000 GBP
Other comprehensive income [abstract]
Other comprehensive income	– GBP	– GBP	—	—	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	—	—	2,000,000 GBP	2,000,000 GBP	2,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP
Comprehensive income	– GBP	338,000,000 GBP	—	—	338,000,000 GBP	338,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	—	—	3,000,000 GBP	2,000,000 GBP	1,000,000 GBP	– GBP	– GBP	– GBP	1,000,000 GBP	2,000,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	338,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	3,000,000 GBP	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	2,000,000 GBP	—	—	—	—	—