Analysis Of Income And Expense [Abstract]

IG Group Holdings PLC - Filing #1755413

Concept	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2021-06-01 to 2022-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31	2020-06-01 to 2021-05-31
Analysis of income and expense [abstract]
Material income and expense [abstract]
Other operating income (expense)	8,600,000 GBP	—	—	—	—	—	—	—	—	—	—	7. 0 GBP	—	—
Miscellaneous other operating expense	2 . 5 GBP	—	—	—	—	—	—	—	—	—	—	0. 9 GBP	—	—
Operating expense	499. 2 GBP	—	—	—	—	—	—	—	—	—	—	390,500,000 GBP	—	—
Trading income (expense) [abstract]
Trading income (expense)	982 . 0 GBP	—	—	—	—	—	—	—	—	—	—	84 6.9 GBP	—	—
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]
Share of profit (loss) of associates accounted for using equity method	2 . 3 GBP	—	—	—	—	—	—	—	—	—	—	– GBP	—	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income from continuing operations	459,500,000 GBP	—	—	—	—	—	—	—	—	—	—	3 49. 6 GBP	—	—
Comprehensive income from discontinued operations	10 4 . 8 GBP	—	—	—	—	—	—	—	—	—	—	0 .1 GBP	—	—
Comprehensive income	564 .3 GBP	– GBP	– GBP	64,400,000 GBP	4 . 0 GBP	– GBP	503,900,000 GBP	20. 9 GBP	– GBP	– GBP	3 71. 9 GBP	3 49.7 GBP	1. 3 GBP	– GBP
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	564 .3 GBP	—	—	—	—	—	—	—	—	—	—	3 49.7 GBP	—	—