Statement Of Changes In Equity [Abstract]

Oxford Instruments PLC - Filing #1909204

Concept	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	As at 2023-03-31	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	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	2021-04-01 to 2022-03-31	As at 2022-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	344 .0 GBP	62 .6 GBP	2 .9 GBP	—	—	—	—	265,400,000 GBP	—	12 .9 GBP	—	0. 2 GBP	—	—	—	—	—	0. 2 GBP	2,900,000 GBP	7. 6 GBP	62. 5 GBP	243 . 2 GBP	—	316. 4 GBP	194. 1 GBP	0. 2 GBP	266. 2 GBP	62 . 4 GBP	2 .9 GBP	6,600,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	– GBP	– GBP	– GBP	5 8.6 GBP	—	– GBP	—	58,600,000 GBP	—	– GBP	– GBP	38,600,000 GBP	– GBP	– GBP	—	—	—	—	—	38,600,000 GBP	—	—	—	—	—	—	—
Other comprehensive income	—	—	—	—	—	—	—	—	—	—	23 .6 GBP	—	—	—	—	—	—	—	—	—	—	—	21 . 5 GBP	—	—	—	—	—	—	—
Issue of equity	—	—	—	– GBP	100,000 GBP	– GBP	– GBP	—	– GBP	—	100,000 GBP	—	0. 1 GBP	– GBP	– GBP	– GBP	– GBP	—	—	—	—	—	0. 1 GBP	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	—	– GBP	– GBP	– GBP	10. 6 GBP	—	– GBP	—	10. 6 GBP	—	– GBP	– GBP	12 . 3 GBP	– GBP	– GBP	—	—	—	—	—	1 2 .3 GBP	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	– GBP	– GBP	– GBP	2,400,000 GBP	—	– GBP	—	2,400,000 GBP	—	– GBP	– GBP	2,100,000 GBP	– GBP	– GBP	—	—	—	—	—	2,100,000 GBP	—	—	—	—	—	—	—