Profit Or Loss [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
Profit or loss [abstract]
Profit (loss) [abstract]
Administrative expenses	39,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	36,400,000 GBP	—	—	—	—	—	—	—
Profit (loss) from operating activities	428,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	238,300,000 GBP	—	—	—	—	—	—	—
Finance income	900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—
Finance costs	40,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	39,700,000 GBP	—	—	—	—	—	—	—
Profit (loss) before tax	475,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	279,500,000 GBP	—	—	—	—	—	—	—
Tax expense (income)	500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	—	—	—	—	—	—
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
Earnings per share [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Earnings per share [abstract]
Earnings per share [line items]
Basic earnings per share [abstract]
Basic earnings (loss) per share	4.2425	—	—	—	—	—	—	—	—	—	—	—	2.4984	—	—	—	—	—	—	—
Diluted earnings per share [abstract]
Diluted earnings (loss) per share	4.2425	—	—	—	—	—	—	—	—	—	—	—	2.4984	—	—	—	—	—	—	—