Analysis Of Income And Expense [Abstract]

Spirax-Sarco Engineering PLC - Filing #1871845

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	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	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	1,610,600,000 GBP	—	—	– GBP	1,610,600,000 GBP	—	—	—	—	—	—	—	—	– GBP	1,344,500,000 GBP	—	1,344,500,000 GBP	—
Material income and expense [abstract]
Finance income (cost)	—	—	10,700,000 GBP	—	—	1,100,000 GBP	9,600,000 GBP	—	—	—	—	—	—	—	—	– GBP	6,400,000 GBP	—	6,400,000 GBP	—
Operating expense	—	—	1,291,800,000 GBP	—	—	61,400,000 GBP	1,230,400,000 GBP	—	—	—	—	—	—	—	—	19,400,000 GBP	1,004,200,000 GBP	—	1,023,600,000 GBP	—
Miscellaneous other comprehensive income [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	– GBP	– GBP	54,800,000 GBP	– GBP	– GBP	—	—	54,800,000 GBP	– GBP	54,800,000 GBP	– GBP	– GBP	6,800,000 GBP	– GBP	6,800,000 GBP	—	—	– GBP	6,800,000 GBP	– GBP
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]
Share of profit (loss) of associates accounted for using equity method	—	—	– GBP	—	—	– GBP	– GBP	—	—	—	—	—	—	—	—	– GBP	– GBP	—	– GBP	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	– GBP	3,500,000 GBP	273,000,000 GBP	218,200,000 GBP	300,000 GBP	—	—	272,700,000 GBP	– GBP	58,000,000 GBP	300,000 GBP	2,800,000 GBP	262,400,000 GBP	– GBP	6,800,000 GBP	—	—	– GBP	262,700,000 GBP	272,000,000 GBP
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	272,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	262,400,000 GBP	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	300,000 GBP	—