Profit Or Loss [Abstract]

Admiral Group PLC - Filing #2008813

Concept	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	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	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Profit or loss [abstract]
Profit (loss) [abstract]
Revenue	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Insurance revenue	3,486,100,000 GBP	—	—	—	—	—	—	—	—	—	—	2,956,900,000 GBP	—	—	—	—	—	—	—	—
Other gains (losses)	31,700,000 GBP	—	—	—	—	—	—	—	—	—	—	119,600,000 GBP	—	—	—	—	—	—	—	—
Insurance service expenses from insurance contracts issued	3,093,200,000 GBP	—	—	—	—	—	—	—	—	—	—	2,737,200,000 GBP	—	—	—	—	—	—	—	—
Profit (loss) from operating activities	462,900,000 GBP	—	—	—	—	—	—	—	—	—	—	373,200,000 GBP	—	—	—	—	—	—	—	—
Finance costs	20,500,000 GBP	—	—	—	—	—	—	—	—	—	—	13,500,000 GBP	—	—	—	—	—	—	—	—
Insurance finance income (expenses) from insurance contracts issued recognised in profit or loss	94,500,000 GBP	—	—	—	—	—	—	—	—	—	—	52,000,000 GBP	—	—	—	—	—	—	—	—
Finance income (expenses) from reinsurance contracts held recognised in profit or loss	28,900,000 GBP	—	—	—	—	—	—	—	—	—	—	13,600,000 GBP	—	—	—	—	—	—	—	—
Profit (loss) before tax	442,800,000 GBP	—	—	—	—	—	—	—	—	—	—	361,200,000 GBP	—	—	—	—	—	—	—	—
Tax expense (income)	105,600,000 GBP	—	—	—	—	—	—	—	—	—	—	75,900,000 GBP	—	—	—	—	—	—	—	—
Profit (loss)	337,200,000 GBP	– GBP	338,000,000 GBP	800,000 GBP	338,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	285,300,000 GBP	286,500,000 GBP	1,200,000 GBP	– GBP	– GBP	– GBP	286,500,000 GBP	– GBP	– GBP
Profit (loss), attributable to [abstract]
Profit (loss), attributable to owners of parent	338,000,000 GBP	—	—	—	—	—	—	—	—	—	—	286,500,000 GBP	—	—	—	—	—	—	—	—
Profit (loss), attributable to non-controlling interests	800,000 GBP	—	—	—	—	—	—	—	—	—	—	1,200,000 GBP	—	—	—	—	—	—	—	—
Earnings per share [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Earnings per share [abstract]
Earnings per share [line items]
Basic earnings per share [abstract]
Basic earnings (loss) per share	1.112	—	—	—	—	—	—	—	—	—	—	0.954	—	—	—	—	—	—	—	—
Diluted earnings per share [abstract]
Diluted earnings (loss) per share	1.108	—	—	—	—	—	—	—	—	—	—	0.950	—	—	—	—	—	—	—	—