Disclosure Of Fair Value Measurement [Text Block]

Derwent London PLC - Filing #3488061

Concept	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	2021-01-01 to 2021-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Disclosure of fair value measurement [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—		—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of fair value measurement of assets [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of fair value measurement of assets [abstract]
Disclosure of fair value measurement of assets [line items]
Assets	—	—	5,892,000,000 GBP	3,744,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3,375,500,000 GBP	—	—	—	—	—	—	—	—	5,531,400,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Reconciliation of changes in fair value measurement, assets [abstract]
Disclosure of fair value measurement of liabilities [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of fair value measurement of liabilities [abstract]
Disclosure of fair value measurement of liabilities [line items]
Liabilities	—	—	1,450,200,000 GBP	2,362,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,928,700,000 GBP	—	—	—	—	—	—	—	—	1,216,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Reconciliation of changes in fair value measurement, liabilities [abstract]
Disclosure of fair value measurement of equity [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of fair value measurement of equity [abstract]
Disclosure of fair value measurement of equity [line items]
Equity	3,299,700,000 GBP	941,100,000 GBP	4,441,800,000 GBP	1,382,300,000 GBP	925,600,000 GBP	– GBP	1,382,300,000 GBP	195,400,000 GBP	5,600,000 GBP	255,700,000 GBP	4,441,800,000 GBP	195,400,000 GBP	– GBP	5,600,000 GBP	—	3,124,500,000 GBP	51,900,000 GBP	4,263,200,000 GBP	5,600,000 GBP	1,446,800,000 GBP	– GBP	1,446,800,000 GBP	5,600,000 GBP	926,300,000 GBP	321,200,000 GBP	193,700,000 GBP	939,400,000 GBP	193,700,000 GBP	4,315,100,000 GBP	4,421,200,000 GBP	55,700,000 GBP	936,200,000 GBP	403,700,000 GBP	5,600,000 GBP	1,525,600,000 GBP	193,000,000 GBP	4,476,900,000 GBP	– GBP	1,525,600,000 GBP	193,000,000 GBP	3,286,400,000 GBP	923,300,000 GBP	5,600,000 GBP
Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract]