Statement Of Comprehensive Income [Abstract]

Admiral Group PLC - Filing #1869190

Concept	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	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	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31
Statement of comprehensive income [abstract]
Profit (loss)	– GBP	– GBP	373,000,000 GBP	– GBP	371,800,000 GBP	– GBP	373,000,000 GBP	1,200,000 GBP	– GBP	1,200,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	997,900,000 GBP	996,700,000 GBP	997,900,000 GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Cash flow hedges [abstract]
Other comprehensive income, before tax, cash flow hedges	—	—	—	—	25,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	6,600,000 GBP	—
Financial assets measured at fair value through other comprehensive income [abstract]
Other comprehensive income, before tax, financial assets measured at fair value through other comprehensive income	– GBP	– GBP	255,600,000 GBP	255,600,000 GBP	255,600,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	50,100,000 GBP	– GBP	– GBP	50,100,000 GBP	50,100,000 GBP	– GBP
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to cash flow hedges included in other comprehensive income	7,000,000 GBP	– GBP	7,000,000 GBP	– GBP	7,000,000 GBP	– GBP	– GBP	– GBP	– GBP	—	—	—	—	—	—	—	– GBP	—
Income tax relating to financial assets measured at fair value through other comprehensive income included in other comprehensive income	– GBP	– GBP	13,000,000 GBP	13,000,000 GBP	13,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	1,400,000 GBP	– GBP	– GBP	1,400,000 GBP	1,400,000 GBP	– GBP
Other comprehensive income	—	—	—	—	217,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	52,500,000 GBP	—
Comprehensive income	18,100,000 GBP	– GBP	155,300,000 GBP	242,600,000 GBP	154,200,000 GBP	– GBP	373,000,000 GBP	1,100,000 GBP	6,800,000 GBP	1,500,000 GBP	– GBP	6,600,000 GBP	48,700,000 GBP	– GBP	10,100,000 GBP	945,700,000 GBP	944,200,000 GBP	997,900,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	155,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	945,700,000 GBP	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	1,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	1,500,000 GBP	—