Statement Of Changes In Equity [Abstract]

Direct Line Insurance Group PLC - Filing #2024748

Concept	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 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	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	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 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	As at 2022-01-01	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	484,700,000 GBP	143,100,000 GBP	200,000 GBP	1,456,900,000 GBP	346,500,000 GBP	3,600,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	2,404,700,000 GBP	29,900,000 GBP	2,058,200,000 GBP	—	—	1,456,900,000 GBP	—	346,500,000 GBP	— GBP	900,000 GBP	—	—	2,191,800,000 GBP	—	283,400,000 GBP	39,000,000 GBP	143,100,000 GBP	— GBP	1,845,300,000 GBP	—	—	—	—	2,797,100,000 GBP	1,454,800,000 GBP	1,454,800,000 GBP	— GBP	346,500,000 GBP	1,500,000 GBP	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	7,500,000 GBP	— GBP	7,500,000 GBP	1,500,000 GBP	— GBP	346,500,000 GBP	96,100,000 GBP	— GBP	96,100,000 GBP	41,400,000 GBP	41,400,000 GBP	2,896,700,000 GBP	— GBP	2,550,200,000 GBP	145,200,000 GBP	300,000 GBP	2,450,600,000 GBP	300,000 GBP	145,200,000 GBP	890,800,000 GBP	2,797,100,000 GBP	— GBP	— GBP	— GBP	982,900,000 GBP	4,000,000 GBP	3,500,000 GBP	3,500,000 GBP	96,100,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	—	—	—	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	222,900,000 GBP	—	— GBP	222,900,000 GBP	222,900,000 GBP	—	—	—	— GBP	— GBP	—	— GBP	—	—	—	— GBP	— GBP	—	231,900,000 GBP	—	—	—	—	—	231,900,000 GBP	— GBP	231,900,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	—	—	—	—	—	— GBP	200,000 GBP	2,700,000 GBP	— GBP	— GBP	— GBP	2,600,000 GBP	2,600,000 GBP	— GBP	100,000 GBP	2,600,000 GBP	—	—	—	— GBP	— GBP	—	— GBP	—	—	—	— GBP	600,000 GBP	—	7,600,000 GBP	—	—	—	—	—	7,600,000 GBP	300,000 GBP	7,300,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	—	—	—	—	—	— GBP	200,000 GBP	2,700,000 GBP	— GBP	— GBP	— GBP	225,500,000 GBP	—	— GBP	223,000,000 GBP	225,500,000 GBP	—	—	—	— GBP	— GBP	—	— GBP	—	—	—	— GBP	600,000 GBP	—	239,500,000 GBP	—	—	—	—	—	239,500,000 GBP	300,000 GBP	239,200,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	—	—	—	—	—	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	16,600,000 GBP	—	— GBP	16,600,000 GBP	16,600,000 GBP	—	—	—	— GBP	— GBP	—	— GBP	—	—	—	— GBP	— GBP	—	314,500,000 GBP	—	—	—	—	—	314,500,000 GBP	— GBP	314,500,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	—	—	—	—	— GBP	— GBP	— GBP	— GBP	— GBP	— GBP	13,900,000 GBP	—	— GBP	13,900,000 GBP	13,900,000 GBP	—	—	—	— GBP	— GBP	—	— GBP	—	—	—	— GBP	— GBP	—	9,600,000 GBP	—	—	—	—	—	9,600,000 GBP	— GBP	9,600,000 GBP	— GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—