Analysis Of Income And Expense [Abstract]

Essentra PLC - Filing #1600165

Concept	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	—	—	—	—	—	959,700,000 GBP	—	—	—	896,500,000 GBP	—	—	—	—	—	—
Expenses by nature [abstract]
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Amortisation expense	—	—	—	—	—	—	—	22,400,000 GBP	—	—	—	22,600,000 GBP	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [abstract]
Disclosure of attribution of expenses by nature to their function [line items]
Miscellaneous other comprehensive income [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations	—	—	—	—	—	—	—	23,400,000 GBP	—	—	—	9,300,000 GBP	—	—	—	—	—	—
Other comprehensive income, before tax, hedges of net investments in foreign operations	—	—	—	—	—	—	—	400,000 GBP	—	—	—	3,300,000 GBP	—	—	—	—	—	—
Other comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	100,000 GBP	—	—	—	500,000 GBP	—	—	—	—	—	—
Income tax relating to components of other comprehensive income [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	—	—	—	—	400,000 GBP	—	—	—	500,000 GBP	—	—	—	—	—	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	1,300,000 GBP	23,400,000 GBP	- GBP	1,400,000 GBP	- GBP	- GBP	- GBP	24,000,000 GBP	47,500,000 GBP	7,900,000 GBP	- GBP	20,100,000 GBP	13,100,000 GBP	1,300,000 GBP	400,000 GBP	- GBP	- GBP	- GBP
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	—	22,700,000 GBP	—	—	—	21,400,000 GBP	—	—	—	—	—	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	1,300,000 GBP	—	—	—	1,300,000 GBP	—	—	—	—	—	—