Statement Of Changes In Equity [Abstract]

Barratt Developments PLC - Filing #1771111

Concept	2021-07-01 to 2022-06-30	As at 2022-06-30	As at 2022-06-30	As at 2022-06-30	2021-07-01 to 2022-06-30	As at 2022-06-30	2021-07-01 to 2022-06-30	2021-07-01 to 2022-06-30	2021-07-01 to 2022-06-30	2021-07-01 to 2022-06-30	As at 2022-06-30	2021-07-01 to 2022-06-30	2021-07-01 to 2022-06-30	As at 2022-06-30	As at 2022-06-30	2021-07-01 to 2022-06-30	As at 2022-06-30	As at 2022-06-30	As at 2021-06-30	As at 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	As at 2021-06-30	As at 2021-06-30	2020-07-01 to 2021-06-30	As at 2021-06-30	As at 2021-06-30	As at 2021-06-30	As at 2021-06-30	2020-07-01 to 2021-06-30	2020-07-01 to 2021-06-30	As at 2021-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30	As at 2020-06-30
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	4,163,900,000 GBP	253,400,000 GBP	800,000 GBP	—	29,000,000 GBP	—	—	—	—	5,631,300,000 GBP	—	—	1,109,000,000 GBP	27,000,000 GBP	—	4,165,900,000 GBP	102,200,000 GBP	1,109,000,000 GBP	5,452,100,000 GBP	—	—	—	—	—	—	27,600,000 GBP	245,300,000 GBP	—	101,800,000 GBP	1,100,000 GBP	3,972,000,000 GBP	4,700,000 GBP	—	—	3,994,900,000 GBP	16,600,000 GBP	1,109,000,000 GBP	3,386,400,000 GBP	1,400,000 GBP	245,200,000 GBP	20,100,000 GBP	101,800,000 GBP	4,840,300,000 GBP	3,382,900,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	—	—	—	515,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	– GBP	– GBP	300,000 GBP	– GBP	– GBP	659,800,000 GBP	—	—	660,100,000 GBP	—	—	—	—	– GBP	659,800,000 GBP	—	—	—	—	—	—	—	—	—	—
Comprehensive income	– GBP	—	—	—	– GBP	—	– GBP	515,200,000 GBP	– GBP	100,000 GBP	—	515,100,000 GBP	– GBP	—	—	515,100,000 GBP	—	—	—	—	– GBP	– GBP	300,000 GBP	– GBP	– GBP	658,000,000 GBP	—	—	658,300,000 GBP	—	—	—	—	– GBP	658,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Issue of equity	– GBP	—	—	—	– GBP	—	– GBP	8,500,000 GBP	400,000 GBP	– GBP	—	– GBP	8,100,000 GBP	—	—	– GBP	—	—	—	—	– GBP	– GBP	– GBP	100,000 GBP	– GBP	– GBP	—	—	100,000 GBP	—	—	—	—	– GBP	– GBP	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	– GBP	—	—	—	– GBP	—	24,200,000 GBP	24,200,000 GBP	– GBP	– GBP	—	– GBP	– GBP	—	—	24,200,000 GBP	—	—	—	—	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	—	—	20,400,000 GBP	—	—	—	—	20,400,000 GBP	20,400,000 GBP	—	—	—	—	—	—	—	—	—	—