Statement Of Changes In Equity [Abstract]

Direct Line Insurance Group PLC - Filing #2024748

Concept	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 changes in equity [abstract]
Statement of changes in equity [line items]
Decrease (increase) through tax on share-based payment transactions, equity	— GBP	300,000 GBP	300,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	300,000 GBP	— GBP	— GBP	200,000 GBP	200,000 GBP	— GBP	— GBP	— GBP	— GBP	200,000 GBP	— GBP
Increase (decrease) through transactions with owners, equity	— GBP	21,700,000 GBP	12,600,000 GBP	— GBP	— GBP	— GBP	9,100,000 GBP	— GBP	— GBP	12,600,000 GBP	2,400,000 GBP	2,100,000 GBP	365,800,000 GBP	368,200,000 GBP	2,100,000 GBP	— GBP	— GBP	— GBP	365,800,000 GBP	— GBP
Cancellation of treasury shares	—	—	—	—	—	—	—	—	—	—	— GBP	2,100,000 GBP	50,100,000 GBP	50,100,000 GBP	2,100,000 GBP	— GBP	— GBP	— GBP	50,100,000 GBP	— GBP