Statement Of Comprehensive Income [Abstract]

Marshalls PLC - Filing #5821477

Concept	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	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	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Statement of 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 [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	— GBP	— GBP	— GBP	— GBP	13,400,000 GBP	13,400,000 GBP	— GBP	— GBP	— GBP	— GBP	9,800,000 GBP	9,800,000 GBP	— GBP	— GBP	9,800,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations	— GBP	— GBP	— GBP	200,000 GBP	— GBP	200,000 GBP	— GBP	— GBP	— GBP	— GBP	100,000 GBP	100,000 GBP	— GBP	— GBP	— GBP	— GBP	100,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP
Cash flow hedges [abstract]
Gains (losses) on cash flow hedges, before tax	— GBP	— GBP	— GBP	— GBP	— GBP	1,600,000 GBP	1,600,000 GBP	— GBP	— GBP	— GBP	600,000 GBP	600,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	600,000 GBP
Reclassification adjustments on cash flow hedges, before tax	— GBP	— GBP	— GBP	— GBP	— GBP	2,400,000 GBP	2,400,000 GBP	— GBP	— GBP	— GBP	1,100,000 GBP	1,100,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	1,100,000 GBP
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to remeasurements of defined benefit plans included in other comprehensive income	— GBP	— GBP	— GBP	— GBP	3,400,000 GBP	3,400,000 GBP	— GBP	— GBP	— GBP	— GBP	2,400,000 GBP	2,400,000 GBP	— GBP	— GBP	2,400,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	— GBP	— GBP	— GBP	— GBP	— GBP	200,000 GBP	200,000 GBP	— GBP	— GBP	— GBP	800,000 GBP	800,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	800,000 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
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	40,600,000 GBP	—	—	—	—	10,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	— GBP	—	—	—	—	800,000 GBP	—	—	—	—	—	—	—	—	—	—	—