Statement Of Changes In Equity [Abstract]

British Land Co PLC - Filing #3461639

Concept	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	2022-04-01 to 2023-03-31	As at 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	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	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	2021-04-01 to 2022-03-31	As at 2022-03-31	As at 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	As at 2022-03-31	2021-04-01 to 2022-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	—	5,512,000,000 GBP	—	—	—	13,000,000 GBP	5,525,000,000 GBP	1,308,000,000 GBP	234,000,000 GBP	2,000,000 GBP	—	—	—	—	13,000,000 GBP	3,742,000,000 GBP	—	213,000,000 GBP	—	—	—	—	—	—	—	—	6,753,000,000 GBP	213,000,000 GBP	2,000,000 GBP	234,000,000 GBP	1,307,000,000 GBP	4,994,000,000 GBP	—	6,768,000,000 GBP	15,000,000 GBP	—	—	3,000,000 GBP	—	2,000,000 GBP	4,184,000,000 GBP	6,013,000,000 GBP	213,000,000 GBP	1,307,000,000 GBP	234,000,000 GBP	14,000,000 GBP	59,000,000 GBP	5,954,000,000 GBP	– GBP	– GBP	14,000,000 GBP	30,000,000 GBP	– GBP	4,154,000,000 GBP	234,000,000 GBP	5, 983 GBP	5,924,000,000 GBP	59,000,000 GBP	– GBP	– GBP	213,000,000 GBP	2,000,000 GBP	30,000,000 GBP	30,000,000 GBP	– GBP	1,307,000,000 GBP
Changes in equity [abstract]
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	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	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Issue of equity	– GBP	1,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	1,000,000 GBP	– GBP	– GBP	– GBP	—	—	– GBP	—	1,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	– GBP	215,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	– GBP	– GBP	– GBP	215,000,000 GBP	—	—	– GBP	—	215,000,000 GBP	157,000,000 GBP	– GBP	– GBP	157,000,000 GBP	– GBP	– GBP	– GBP	—	—	—	—	—	—	157,000,000 GBP	—	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—