Statement Of Comprehensive Income [Abstract]

CMC Markets PLC - Filing #3479858

Concept	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	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	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31
Statement of comprehensive income [abstract]
Profit (loss)	— GBP	46,886,000 GBP	— GBP	— GBP	— GBP	— GBP	46, 886 GBP	41 , 4 3 9 GBP	— GBP	— GBP	41 , 4 3 9 GBP	— GBP	— GBP	— GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Gains (losses) on exchange differences on translation of foreign operations, net of tax	5,285,000 GBP	5,285,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	1 , 760 GBP	— GBP	— GBP	— GBP	1 ,7 60 GBP	— GBP	— GBP
Hedges of net investment in foreign operations [abstract]
Gains (losses) on hedges of net investments in foreign operations, net of tax	—	— GBP	—	—	—	—	—	86,000 GBP	— GBP	— GBP	— GBP	86,000 GBP	— GBP	— GBP
Financial assets measured at fair value through other comprehensive income [abstract]
Gains (losses) on financial assets measured at fair value through other comprehensive income, net of tax	144,000 GBP	14 4 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	2 10 GBP	— GBP	— GBP	— GBP	2 10 GBP	— GBP	— GBP
Other comprehensive income	—	4 , 9 0 4 GBP	—	—	—	—	—	1 , 8 1 9 GBP	—	—	—	—	—	—
Comprehensive income	4 , 9 0 4 GBP	41 , 9 8 2 GBP	— GBP	— GBP	— GBP	— GBP	46, 886 GBP	39,620,000 GBP	— GBP	— GBP	41 , 4 3 9 GBP	1 , 8 19 GBP	— GBP	— GBP