Statement Of Changes In Equity [Abstract]

Jupiter Fund Management PLC - Filing #1583784

Concept	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	400,000 GBP	639,700,000 GBP	250,100,000 GBP	—	—	—	900,800,000 GBP	—	900,800,000 GBP	– GBP	—	300,000 GBP	11,100,000 GBP	—	—	—	622,500,000 GBP	200,000 GBP	—	11,100,000 GBP	886,300,000 GBP	—	200,000 GBP	2,800,000 GBP	250,100,000 GBP	—	—	886,100,000 GBP	—	—	—	611,700,000 GBP	– GBP	8,000,000 GBP	2,100,000 GBP	611,700,000 GBP	592,700,000 GBP	300,000 GBP	9,200,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	200,000 GBP	—	—	—	– GBP	– GBP	149,400,000 GBP	—	– GBP	—	—	– GBP	—	—	149,600,000 GBP	149,400,000 GBP	105,300,000 GBP	—	—	– GBP	—	—	105,500,000 GBP	—	—	—	– GBP	– GBP	—	– GBP	200,000 GBP	105,500,000 GBP	—	—	—	—	—	—	—	—
Other comprehensive income	– GBP	—	—	—	– GBP	– GBP	2,500,000 GBP	—	2,500,000 GBP	—	—	– GBP	—	—	2,500,000 GBP	– GBP	700,000 GBP	—	—	– GBP	—	—	– GBP	—	—	—	– GBP	– GBP	—	700,000 GBP	– GBP	700,000 GBP	—	—	—	—	—	—	—	—
Comprehensive income	200,000 GBP	—	—	—	– GBP	– GBP	146,900,000 GBP	—	2,500,000 GBP	—	—	– GBP	—	—	147,100,000 GBP	149,400,000 GBP	106,000,000 GBP	—	—	– GBP	—	—	105,500,000 GBP	—	—	—	– GBP	– GBP	—	700,000 GBP	200,000 GBP	106,200,000 GBP	—	—	—	—	—	—	—	—
Issue of equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	244,000,000 GBP	—	—	– GBP	—	—	– GBP	—	—	—	242,100,000 GBP	1,900,000 GBP	—	– GBP	– GBP	244,000,000 GBP	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	– GBP	—	—	—	– GBP	– GBP	109,800,000 GBP	—	– GBP	—	—	– GBP	—	—	109,800,000 GBP	109,800,000 GBP	83,900,000 GBP	—	—	– GBP	—	—	83,900,000 GBP	—	—	—	– GBP	– GBP	—	– GBP	– GBP	83,900,000 GBP	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	– GBP	—	—	—	– GBP	– GBP	25,500,000 GBP	—	– GBP	—	—	– GBP	—	—	25,500,000 GBP	25,500,000 GBP	19,800,000 GBP	—	—	– GBP	—	—	19,800,000 GBP	—	—	—	– GBP	– GBP	—	– GBP	– GBP	19,800,000 GBP	—	—	—	—	—	—	—	—