Profit Or Loss [Abstract]

OSB Group PLC - Filing #1592509

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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Profit or loss [abstract]
Profit (loss) [abstract]
Revenue	—	—	—	—	—	—	—	—	—	—	6 2 9.0 GBP	—	—	50 8.6 GBP	—	—	—	—	—	—	—	—	—	—
Other income	—	—	—	—	—	—	—	—	—	—	7. 9 GBP	—	—	9. 0 GBP	—	—	—	—	—	—	—	—	—	—
Administrative expenses	—	—	—	—	—	—	—	—	—	—	16 6.5 GBP	—	—	157 .0 GBP	—	—	—	—	—	—	—	—	—	—
Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9	—	—	—	—	—	—	—	—	—	—	4,400,000 GBP	—	—	71,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Profit (loss) before tax	—	—	—	—	—	—	—	—	—	—	464,600,000 GBP	—	—	2 6 0.4 GBP	—	—	—	—	—	—	—	—	—	—
Tax expense (income)	—	—	—	—	—	—	—	—	—	—	11 9. 3 GBP	—	—	6 4.1 GBP	—	—	—	—	—	—	—	—	—	—
Profit (loss)	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	345 .3 GBP	345,300,000 GBP	– GBP	196 .3 GBP	– GBP	– GBP	– GBP	196,300,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– 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	—	—	—	—	—	—	—	—	—	—	76 . 0	—	—	42 .8	—	—	—	—	—	—	—	—	—	—
Diluted earnings per share [abstract]
Diluted earnings (loss) per share	—	—	—	—	—	—	—	—	—	—	0.752	—	—	42 .4	—	—	—	—	—	—	—	—	—	—