Statement Of Comprehensive Income [Abstract]

Oxford Instruments PLC - Filing #1669474

Concept	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2020-04-01 to 2021-03-31	2020-04-01 to 2021-03-31	2020-04-01 to 2021-03-31	2020-04-01 to 2021-03-31	2020-04-01 to 2021-03-31	2020-04-01 to 2021-03-31
Statement of comprehensive income [abstract]
Profit (loss)	— GBP	— GBP	38,600,000 GBP	— GBP	— GBP	38,600,000 GBP	— GBP	— GBP	— GBP	— GBP	41 . 8 GBP	41 . 8 GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	— GBP	— GBP	2 7. 3 GBP	— GBP	— GBP	2 7. 3 GBP	— GBP	— GBP	— GBP	— GBP	3 0. 8 GBP	30. 8 GBP
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	— GBP	— GBP	6 .8 GBP	— GBP	— GBP	6. 8 GBP	— GBP	— GBP	— GBP	— GBP	5. 5 GBP	5,500,000 GBP
Other comprehensive income	—	—	—	—	—	21 .5 GBP	—	—	—	—	—	30. 2 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	— GBP	1 .0 GBP	59. 1 GBP	— GBP	— GBP	60. 1 GBP	4,900,000 GBP	— GBP	— GBP	— GBP	16. 5 GBP	11 .6 GBP