Statement Of Changes In Equity [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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Decrease (increase) through tax on share-based payment transactions, equity	— GBP	— GBP	200,000 GBP	200,000 GBP	200,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	700,000 GBP	— GBP	— GBP	700,000 GBP	— GBP	— GBP	700,000 GBP
Increase (decrease) through transactions with owners, equity	2,400,000 GBP	2,100,000 GBP	365,900,000 GBP	365,900,000 GBP	368,300,000 GBP	— GBP	— GBP	2,100,000 GBP	— GBP	— GBP	3,700,000 GBP	421,000,000 GBP	1,100,000 GBP	3,700,000 GBP	421,000,000 GBP	— GBP	— GBP	419,900,000 GBP
Cancellation of treasury shares	— GBP	2,100,000 GBP	50,100,000 GBP	50,100,000 GBP	50,100,000 GBP	— GBP	— GBP	2,100,000 GBP	— GBP	— GBP	3,700,000 GBP	101,000,000 GBP	— GBP	3,700,000 GBP	101,000,000 GBP	— GBP	— GBP	101,000,000 GBP