Statement Of Cash Flows [Abstract]

Derwent London PLC - Filing #2016614

Concept	2023-01-01 to 2023-12-31	As at 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	As at 2023-12-31	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	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	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2021-12-31	As at 2021-12-31
Statement of cash flows [abstract]
Cash flows from (used in) operating activities [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	—	—
Adjustments to reconcile profit (loss) [abstract]
Adjustments for finance costs	6,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	7,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Cash flows from (used in) operations	135,300,000 GBP	—	—	—	—	—	—	—	—	—	33,700,000 GBP	—	—	—	—	148,700,000 GBP	—	—	—	—	—	—	—	29,800,000 GBP	—	—
Interest received, classified as operating activities	800,000 GBP	—	—	—	—	—	—	—	—	—	800,000 GBP	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—	200,000 GBP	—	—
Cash flows from (used in) operating activities	97,000,000 GBP	—	—	—	—	—	—	—	—	—	62,100,000 GBP	—	—	—	—	111,400,000 GBP	—	—	—	—	—	—	—	58,500,000 GBP	—	—
Cash flows from (used in) investing activities [abstract]
Other cash payments to acquire interests in joint ventures, classified as investing activities	– GBP	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—	– GBP	—	—
Purchase of property, plant and equipment, classified as investing activities	700,000 GBP	—	—	—	—	—	—	—	—	—	400,000 GBP	—	—	—	—	2,000,000 GBP	—	—	—	—	—	—	—	600,000 GBP	—	—
Cash flows from (used in) investing activities	98,000,000 GBP	—	—	—	—	—	—	—	—	—	400,000 GBP	—	—	—	—	51,700,000 GBP	—	—	—	—	—	—	—	600,000 GBP	—	—
Cash flows from (used in) financing activities [abstract]
Proceeds from issuing shares	– GBP	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	1,200,000 GBP	—	—	—	—	—	—	—	1,200,000 GBP	—	—
Proceeds from borrowings, classified as financing activities	300,000 GBP	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	7,400,000 GBP	—	—	—	—	—	—	—	– GBP	—	—
Dividends paid, classified as financing activities	88,700,000 GBP	—	—	—	—	—	—	—	—	—	88,700,000 GBP	—	—	—	—	86,800,000 GBP	—	—	—	—	—	—	—	86,800,000 GBP	—	—
Cash flows from (used in) financing activities	2,600,000 GBP	—	—	—	—	—	—	—	—	—	20,000,000 GBP	—	—	—	—	88,600,000 GBP	—	—	—	—	—	—	—	35,800,000 GBP	—	—
Increase (decrease) in cash and cash equivalents after effect of exchange rate changes	3,600,000 GBP	—	—	—	—	—	—	—	—	—	42,500,000 GBP	—	—	—	—	28,900,000 GBP	—	—	—	—	—	—	—	23,300,000 GBP	—	—
Cash and cash equivalents	—	73,000,000 GBP	—	—	—	—	—	—	—	—	—	24,800,000 GBP	76,600,000 GBP	—	—	—	—	—	—	—	—	—	67,300,000 GBP	—	105,500,000 GBP	90,600,000 GBP