Statement Of Changes In Equity [Abstract]

British Land Co PLC - Filing #3461622

Concept	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 2024-03-31	2023-04-01 to 2024-03-31	As at 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	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	213,000,000 GBP	—	5,299,000,000 GBP	—	—	13,000,000 GBP	3,528,000,000 GBP	—	13,000,000 GBP	1,310,000,000 GBP	—	235,000,000 GBP	—	5,312,000,000 GBP	—	– GBP	—	—	—	—	—	—	5,512,000,000 GBP	—	—	—	13,000,000 GBP	5,525,000,000 GBP	234,000,000 GBP	1,308,000,000 GBP	2,000,000 GBP	—	—	—	13,000,000 GBP	—	3,742,000,000 GBP	—	213,000,000 GBP	—	234,000,000 GBP	6,753,000,000 GBP	213,000,000 GBP	4,994,000,000 GBP	6,768,000,000 GBP	15,000,000 GBP	1,307,000,000 GBP	3,000,000 GBP	2,000,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	– 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	– GBP	1,038,000,000 GBP	—	– GBP	1,303,000,000 GBP	264,000,000 GBP	—	—	—	—	—	– GBP	– GBP	1,038,000,000 GBP	—	1,000,000 GBP	—	– GBP	—	1,039,000,000 GBP	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	– GBP	—	—	—	—	—	2,000,000 GBP	—	—	2,000,000 GBP	—	2,000,000 GBP	—	– GBP	—	– GBP	– GBP	– GBP	– GBP	10,000,000 GBP	10,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	– GBP	– GBP	– GBP	—	– GBP	—	– GBP	—	10,000,000 GBP	—	—	—	—	—	—	—	—	—
Comprehensive income	—	– GBP	—	—	—	—	—	3,000,000 GBP	—	—	2,000,000 GBP	—	1,000,000 GBP	—	– GBP	—	– GBP	– GBP	1,000,000 GBP	2,000,000 GBP	10,000,000 GBP	1,028,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	– GBP	– GBP	1,038,000,000 GBP	—	1,000,000 GBP	—	– GBP	—	1,029,000,000 GBP	—	—	—	—	—	—	—	—	—
Issue of equity	—	– GBP	—	—	—	—	—	3,000,000 GBP	—	—	– GBP	—	3,000,000 GBP	—	– GBP	—	2,000,000 GBP	1,000,000 GBP	– GBP	– GBP	– GBP	1,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	– GBP	1,000,000 GBP	– GBP	—	– GBP	—	– GBP	—	1,000,000 GBP	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	– GBP	—	—	—	—	—	215,000,000 GBP	—	—	– GBP	—	215,000,000 GBP	—	– GBP	—	– GBP	– GBP	215,000,000 GBP	– GBP	– GBP	215,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	– GBP	– GBP	215,000,000 GBP	—	– GBP	—	– GBP	—	215,000,000 GBP	—	—	—	—	—	—	—	—	—