Statement Of Changes In Equity [Abstract]

Spectris PLC - Filing #1588886

Concept	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	9 57. 5 GBP	0 .7 GBP	—	—	1,261. 3 GBP	—	3 . 5 GBP	—	—	3 .1 GBP	231,400,000 GBP	—	66. 2 GBP	5,800,000 GBP	—	—	882 .6 GBP	—	1 .9 GBP	6 .0 GBP	—	—	3 .1 GBP	—	9 8.0 GBP	231,400,000 GBP	—	1 , 2 1 9.7 GBP	—	—	0. 5 GBP	—	1, 321. 5 GBP	6,000,000 GBP	3 .1 GBP	– GBP	18 .9 GBP	98 .6 GBP	231,400,000 GBP	3 .1 GBP	1 , 302 .6 GBP	98,600,000 GBP	96 4.4 GBP	18 .9 GBP	0. 5 GBP	2 31.4 GBP	1. 4 GBP	1 .4 GBP	– GBP	– GBP	6,000,000 GBP	– GBP	500,000 GBP	– GBP	– GBP	983. 3 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	– GBP	– GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	34 6.9 GBP	346. 9 GBP	—	1 7. 0 GBP	—	—	– GBP	1 7. 0 GBP	—	– GBP	—	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	– GBP	1 . 6 GBP	—	– GBP	—	– GBP	31 .8 GBP	—	—	– GBP	—	—	34,400,000 GBP	1 .0 GBP	—	6,200,000 GBP	—	—	– GBP	7. 3 GBP	—	0. 5 GBP	—	—	– GBP	—	600,000 GBP	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	– GBP	1 .6 GBP	—	– GBP	—	– GBP	31 .8 GBP	—	—	– GBP	—	—	3 12.5 GBP	34 5.9 GBP	—	10. 8 GBP	—	—	– GBP	9 .7 GBP	—	0. 5 GBP	—	—	– GBP	—	0. 6 GBP	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	– GBP	– GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	79. 0 GBP	79 .0 GBP	—	7 5 .7 GBP	—	—	– GBP	7 5 .7 GBP	—	– GBP	—	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	– GBP	– GBP	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	—	9,100,000 GBP	9,100,000 GBP	—	3,300,000 GBP	—	—	– GBP	3,300,000 GBP	—	– GBP	—	—	– GBP	—	– GBP	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—