Statement Of Comprehensive Income [Abstract]

Derwent London PLC - Filing #1875168

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	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	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 comprehensive income [abstract]
Profit (loss)	– GBP	– GBP	280,500,000 GBP	280,500,000 GBP	– GBP	– GBP	– GBP	34,300,000 GBP	– GBP	34,300,000 GBP	– GBP	34,300,000 GBP	280,500,000 GBP	– GBP	1,500,000 GBP	– GBP	252,300,000 GBP	– GBP	11,600,000 GBP	– GBP	– GBP	– GBP	– GBP	11,600,000 GBP	11,600,000 GBP	– GBP	253,800,000 GBP	252,300,000 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	—	—	700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3,700,000 GBP	—
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	—	—	2,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,700,000 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	—	—	200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,300,000 GBP	—
Income tax relating to remeasurements of defined benefit plans included in other comprehensive income	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	400,000 GBP	—
Other comprehensive income	– GBP	500,000 GBP	1,500,000 GBP	2,000,000 GBP	– GBP	– GBP	– GBP	2,000,000 GBP	– GBP	2,000,000 GBP	– GBP	2,000,000 GBP	1,500,000 GBP	– GBP	– GBP	2,400,000 GBP	4,700,000 GBP	– GBP	2,300,000 GBP	– GBP	– GBP	– GBP	– GBP	2,300,000 GBP	2,300,000 GBP	– GBP	4,700,000 GBP	2,300,000 GBP
Comprehensive income	—	—	282,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	258,500,000 GBP	—
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	282,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	257,000,000 GBP	—
Comprehensive income, attributable to non-controlling interests	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,500,000 GBP	—