Statement Of Financial Position [Abstract]

Just Group PLC - Filing #1591568

Concept	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 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	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	14 . 2 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	20 .5 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Investment property	—	69,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Current tax assets	—	30. 2 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Deferred tax assets	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	11 . 5 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Assets	—	2 8 , 3 4 7. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2 8 ,17 3 . 4 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	103. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	10 3. 8 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Retained earnings	—	9 7 7. 0 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1, 056.6 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Share premium	—	94,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	94,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Treasury shares	—	4 . 3 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	5 .4 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	—	2 ,119 . 5 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,1 98 . 3 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	1 .9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity	9 7 7. 0 GBP	2,440,000,000 GBP	348 .4 GBP	2,800,000 GBP	5 9 7. 1 GBP	32 2. 4 GBP	4 . 3 GBP	2 , 119. 5 GBP	1. 9 GBP	94,600,000 GBP	103. 9 GBP	1,056 .6 GBP	1 .9 GBP	2 ,19 8 . 3 GBP	103 . 8 GBP	5 9 7. 1 GBP	94. 5 GBP	2 , 490 . 4 GBP	5 .4 GBP	3. 3 GBP	348 .4 GBP	294. 0 GBP	2 , 0 2 7. 8 GBP	0. 8 GBP	94. 5 GBP	2, 321 . 0 GBP	597 .1 GBP	885 .9 GBP	10 3. 5 GBP	6 .0 GBP	34 8.4 GBP	294 .0 GBP	4,400,000 GBP
Liabilities [abstract]
Provisions [abstract]
Other provisions	—	1,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other financial liabilities	—	2 ,8 65.6 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3, 305.1 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Insurance contracts issued that are liabilities	—	21, 812. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	21 ,11 8 . 4 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Reinsurance contracts held that are liabilities	—	2 74 . 7 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2 6 7. 1 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Deferred tax liabilities	—	5. 3 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	22. 8 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Liabilities	—	2 5 , 9 0 7. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	25, 683. 0 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities	—	2 8 , 3 4 7. 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2 8 ,17 3 . 4 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—