Statement Of Comprehensive Income [Abstract]

British Land Co PLC - Filing #3461638

Concept	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31
Statement of comprehensive income [abstract]
Profit (loss)	– GBP	1,038,000,000 GBP	– GBP	1,303,000,000 GBP	264,000,000 GBP	– GBP	1,000,000 GBP	– GBP	1,038,000,000 GBP	– GBP	1,039,000,000 GBP	963,000,000 GBP	– GBP	2,000,000 GBP	963,000,000 GBP	– GBP	– GBP	– GBP	965,000,000 GBP	253,000,000 GBP	71 2 GBP	– GBP
Other comprehensive income [abstract]
Other comprehensive income	10,000,000 GBP	10,000,000 GBP	– GBP	—	—	– GBP	– GBP	– GBP	– GBP	– GBP	10,000,000 GBP	11,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	12,000,000 GBP	11,000,000 GBP	—	—	1,000,000 GBP
Comprehensive income	10,000,000 GBP	1,028,000,000 GBP	– GBP	—	—	– GBP	1,000,000 GBP	– GBP	1,038,000,000 GBP	– GBP	1,029,000,000 GBP	952,000,000 GBP	– GBP	2,000,000 GBP	963,000,000 GBP	– GBP	– GBP	12,000,000 GBP	954,000,000 GBP	—	—	1,000,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	—	—	—	—	1,028,000,000 GBP	—	—	—	—	—	—	—	952,000,000 GBP	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	—	—	—	—	—	—	2,000,000 GBP	—	—	—