Statement Of Comprehensive Income [Abstract]

Derwent London PLC - Filing #2016614

Concept	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 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)	476,400,000 GBP	– GBP	476,400,000 GBP	– GBP	– GBP	189,600,000 GBP	– GBP	– GBP	– GBP	189,600,000 GBP	– GBP	– GBP	280,500,000 GBP	280,500,000 GBP	– GBP	– GBP	– GBP	34,300,000 GBP	– GBP	34,300,000 GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets	3,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	700,000 GBP	—	—	—	—	—	—	—
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	2,000,000 GBP	—	—	—	—	—	—	—
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to changes in revaluation surplus of property, plant and equipment, right-of-use assets and intangible assets included in other comprehensive income	1,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	200,000 GBP	—	—	—	—	—	—	—
Other comprehensive income	3,600,000 GBP	2,900,000 GBP	700,000 GBP	– GBP	– GBP	700,000 GBP	– GBP	– GBP	– GBP	700,000 GBP	– GBP	500,000 GBP	1,500,000 GBP	2,000,000 GBP	– GBP	– GBP	– GBP	2,000,000 GBP	– GBP	2,000,000 GBP
Comprehensive income	480,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	282,000,000 GBP	—	—	—	—	—	—	—