Profit Or Loss [Abstract]

Direct Line Insurance Group PLC - Filing #3490494

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
Profit or loss [abstract]
Profit (loss) [abstract]
Other income	—	—	—	55,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	46,700,000 GBP	—
Finance costs	—	—	—	20,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	34,300,000 GBP	—
Profit (loss) before tax	—	—	—	45,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	446,000,000 GBP	—
Tax expense (income)	—	—	—	5,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	102,300,000 GBP	—
Profit (loss)	— GBP	— GBP	39,500,000 GBP	39,500,000 GBP	39,500,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	343,700,000 GBP	— GBP	343,700,000 GBP	343,700,000 GBP
Profit (loss), attributable to [abstract]
Profit (loss), attributable to owners of parent	—	—	—	39,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	343,700,000 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	—	—	—	0.043	—	—	—	—	—	—	—	—	—	—	—	—	0.245	—
Diluted earnings per share [abstract]
Diluted earnings (loss) per share	—	—	—	0.043	—	—	—	—	—	—	—	—	—	—	—	—	0.241	—