Analysis Of Income And Expense [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
Analysis of income and expense [abstract]
Material income and expense [abstract]
Investment income	—	—	—	51,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	146,300,000 GBP	—
Miscellaneous other operating expense	—	—	—	744,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	807,800,000 GBP	—
Operating expense	—	—	—	955,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	1,048,700,000 GBP	—
Fee and commission income (expense) [abstract]
Fee and commission expense [abstract]
Fee and commission expense	—	—	—	211,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	240,900,000 GBP	—
Income tax relating to components of other comprehensive income [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	67,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	17,100,000 GBP	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	— GBP	250,300,000 GBP	— GBP	250,300,000 GBP	— GBP	46,800,000 GBP	— GBP	203,700,000 GBP	200,000 GBP	74,900,000 GBP	300,000 GBP	— GBP	— GBP	— GBP	271,500,000 GBP	— GBP	271,500,000 GBP	346,700,000 GBP
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	250,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	271,500,000 GBP	—