Statement Of Comprehensive Income [Abstract]

Direct Line Insurance Group PLC - Filing #2024748

Concept	2023-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 to 2023-12-31	2022-01-01 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
Statement of comprehensive income [abstract]
Profit (loss)	—	— GBP	222,900,000 GBP	222,900,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	222,900,000 GBP	— GBP	— GBP	231,900,000 GBP	231,900,000 GBP	— GBP	— GBP	— GBP	— GBP	231,900,000 GBP	— GBP
Other comprehensive income [abstract]
Other comprehensive income that will not be reclassified to profit or loss, net of tax	2,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	7,900,000 GBP	—	—	—	—	—	—	—
Other comprehensive income that will be reclassified to profit or loss, net of tax	200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—
Other comprehensive income	2,600,000 GBP	— GBP	100,000 GBP	2,600,000 GBP	— GBP	200,000 GBP	2,700,000 GBP	— GBP	— GBP	— GBP	2,600,000 GBP	— GBP	— GBP	7,600,000 GBP	7,300,000 GBP	— GBP	— GBP	— GBP	600,000 GBP	7,600,000 GBP	300,000 GBP
Comprehensive income	—	— GBP	223,000,000 GBP	225,500,000 GBP	— GBP	200,000 GBP	2,700,000 GBP	— GBP	— GBP	— GBP	225,500,000 GBP	— GBP	— GBP	239,500,000 GBP	239,200,000 GBP	— GBP	— GBP	— GBP	600,000 GBP	239,500,000 GBP	300,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	225,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	239,500,000 GBP	—	—	—	—	—	—	—