Statement Of Changes In Equity [Abstract]

Morgan Sindall Group PLC - Filing #2007817

Concept	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	568,100,000 GBP	—	508,400,000 GBP	1,300,000 GBP	—	—	56,000,000 GBP	—	2,400,000 GBP	496,200,000 GBP	—	—	—	—	1,100,000 GBP	55,900,000 GBP	436,800,000 GBP	2,400,000 GBP	—	427,100,000 GBP	1,000,000 GBP	474,200,000 GBP	45,800,000 GBP	2,300,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	117,700,000 GBP	—	– GBP	—	—	117,700,000 GBP	– GBP	—	– GBP	—	—	– GBP	– GBP	60,900,000 GBP	60,900,000 GBP	—	—	—	—	– GBP	—	—	—	—	—
Other comprehensive income	200,000 GBP	—	200,000 GBP	—	—	– GBP	– GBP	—	– GBP	—	—	– GBP	2,100,000 GBP	2,100,000 GBP	– GBP	—	—	—	—	– GBP	—	—	—	—	—
Comprehensive income	117,900,000 GBP	—	200,000 GBP	—	—	117,700,000 GBP	– GBP	—	– GBP	—	—	– GBP	2,100,000 GBP	63,000,000 GBP	60,900,000 GBP	—	—	—	—	– GBP	—	—	—	—	—
Issue of equity	100,000 GBP	—	– GBP	—	—	– GBP	100,000 GBP	—	– GBP	—	—	100,000 GBP	– GBP	10,200,000 GBP	– GBP	—	—	—	—	10,100,000 GBP	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	6,600,000 GBP	—	– GBP	—	—	6,600,000 GBP	– GBP	—	– GBP	—	—	– GBP	– GBP	9,700,000 GBP	9,700,000 GBP	—	—	—	—	– GBP	—	—	—	—	—