Analysis Of Income And Expense [Abstract]

Jupiter Fund Management PLC - Filing #1583784

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	—	—	—	—	617,800,000 GBP	—	—	—	500,500,000 GBP	—	—	—	—	—
Material income and expense [abstract]
Fee and commission income (expense) [abstract]
Fee and commission expense [abstract]
Fee and commission expense	—	—	—	—	—	—	49,200,000 GBP	—	—	—	42,700,000 GBP	—	—	—	—	—
Expenses by nature [abstract]
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Amortisation expense	—	—	—	—	—	—	20,600,000 GBP	—	—	—	11,300,000 GBP	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [abstract]
Disclosure of attribution of expenses by nature to their function [line items]
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	200,000 GBP	– GBP	– GBP	– GBP	2,500,000 GBP	146,900,000 GBP	147,100,000 GBP	149,400,000 GBP	105,500,000 GBP	– GBP	106,000,000 GBP	700,000 GBP	200,000 GBP	106,200,000 GBP	– GBP	– GBP