Statement Of Changes In Equity [Abstract]

Marshalls PLC - Filing #5821477

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2023-01-01 to 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	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	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 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	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	—	75,400,000 GBP	393,700,000 GBP	—	200,000,000 GBP	—	63,200,000 GBP	700,000 GBP	—	—	—	—	1,500,000 GBP	141,600,000 GBP	1,700,000 GBP	—	213,100,000 GBP	—	661,300,000 GBP	—	641,300,000 GBP	—	—	373,100,000 GBP	—	75,400,000 GBP	—	—	— GBP	—	200,000,000 GBP	—	63,200,000 GBP	500,000 GBP	141,600,000 GBP	—	2,100,000 GBP	641,300,000 GBP	—	—	1,500,000 GBP	213,100,000 GBP	—	661,100,000 GBP	800,000 GBP	200,000,000 GBP	75,400,000 GBP	391,200,000 GBP	63,200,000 GBP	300,000 GBP	660,300,000 GBP	141,600,000 GBP	1,300,000 GBP	213,100,000 GBP	3,000,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	— GBP	— GBP	—	—	— GBP	—	— GBP	—	—	31,000,000 GBP	31,000,000 GBP	— GBP	— GBP	—	—	—	— GBP	—	— GBP	—	18,400,000 GBP	—	18,600,000 GBP	— GBP	—	200,000 GBP	—	18,600,000 GBP	— GBP	—	— GBP	—	— GBP	—	—	—	— GBP	—	—	— GBP	— GBP	—	—	— GBP	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	— GBP	— GBP	—	—	— GBP	—	200,000 GBP	—	—	10,000,000 GBP	9,600,000 GBP	600,000 GBP	— GBP	—	—	—	— GBP	—	— GBP	—	9,000,000 GBP	—	8,400,000 GBP	— GBP	—	600,000 GBP	—	7,700,000 GBP	— GBP	—	200,000 GBP	—	— GBP	—	—	—	— GBP	—	—	— GBP	— GBP	—	—	900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	— GBP	— GBP	—	—	— GBP	—	200,000 GBP	—	—	41,000,000 GBP	40,600,000 GBP	600,000 GBP	— GBP	—	—	—	— GBP	—	— GBP	—	9,400,000 GBP	—	10,200,000 GBP	— GBP	—	800,000 GBP	—	10,900,000 GBP	— GBP	—	200,000 GBP	—	— GBP	—	—	—	— GBP	—	—	— GBP	— GBP	—	—	900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	— GBP	— GBP	—	—	— GBP	—	— GBP	—	—	21,000,000 GBP	21,000,000 GBP	— GBP	— GBP	—	—	—	— GBP	—	— GBP	—	31,600,000 GBP	—	31,600,000 GBP	— GBP	—	— GBP	—	31,600,000 GBP	— GBP	—	— GBP	—	— GBP	—	—	—	— GBP	—	—	— GBP	— GBP	—	—	— GBP	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	— GBP	— GBP	—	—	— GBP	—	— GBP	—	—	1,800,000 GBP	1,800,000 GBP	— GBP	— GBP	—	—	—	— GBP	—	— GBP	—	2,800,000 GBP	—	2,800,000 GBP	— GBP	—	— GBP	—	2,800,000 GBP	— GBP	—	— GBP	—	— GBP	—	—	—	— GBP	—	—	— GBP	— GBP	—	—	— GBP	—	—	—	—	—	—	—	—	—	—	—	—