Statement Of Comprehensive Income [Abstract]

FORTERRA PLC - Filing #1870671

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	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	– GBP	– GBP	5 8. 8 GBP	– GBP	5 8 .8 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	45,500,000 GBP	45,500,000 GBP
Other comprehensive income [abstract]
Other comprehensive income	– GBP	0 .8 GBP	– GBP	– GBP	0 . 8 GBP	– GBP	– GBP	200,000 GBP	– GBP	– GBP	– GBP	– GBP	200,000 GBP	– GBP
Comprehensive income	– GBP	0 . 8 GBP	– GBP	– GBP	5 9. 6 GBP	– GBP	5 8 . 8 GBP	200,000 GBP	– GBP	– GBP	– GBP	– GBP	45,300,000 GBP	45,500,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	5 9.6 GBP	—	—	—	—	—	—	—	45,300,000 GBP	—