Analysis Of Income And Expense [Abstract]

SSE PLC - Filing #6129683

Concept	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2024-04-01 to 2025-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31	2023-04-01 to 2024-03-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	10,1 31 . 9 GBP	—	—	—	—	—	—	—	—	—	– GBP	10, 131 . 9 GBP	—	10,457,200,000 GBP	—	—	—	—	—	10,457,200,000 GBP	—	—	—	– GBP	—	—
Material income and expense [abstract]
Operating expense	2 ,051 .7 GBP	—	—	—	—	—	—	—	—	—	30 9.7 GBP	1 ,742.0 GBP	—	1,8 48.6 GBP	—	—	—	—	—	1,577 .7 GBP	—	—	—	270,900,000 GBP	—	—
Expenses by nature [abstract]
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Impairment loss (reversal of impairment loss) recognised in profit or loss	47,100,000 GBP	—	—	—	—	—	—	—	—	—	– GBP	47,100,000 GBP	—	128,800,000 GBP	—	—	—	—	—	128,800,000 GBP	—	—	—	– 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	42 . 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	66 .6 GBP	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income, net of tax, hedges of net investments in foreign operations	36,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	30,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]
Share of profit (loss) of associates and joint ventures accounted for using equity method	89,900,000 GBP	—	—	—	—	—	—	—	—	—	21. 1 GBP	111 .0 GBP	—	1 14.1 GBP	—	—	—	—	—	68 .0 GBP	—	—	—	46. 1 GBP	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will not be reclassified to profit or loss, net of tax	15,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax	16,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	4 0.9 GBP	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	1 ,41 1 . 2 GBP	1 , 244. 5 GBP	73. 9 GBP	– GBP	– GBP	– GBP	1 , 263.6 GBP	1 ,337 . 3 GBP	73 .7 GBP	25 . 1 GBP	—	—	6 .0 GBP	1,7 0 3.2 GBP	– GBP	– GBP	– GBP	1,597,600,000 GBP	3 4.7 GBP	—	1 ,602.4 GBP	7 3.1 GBP	100,800,000 GBP	—	33,600,000 GBP	1 ,529. 3 GBP
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	73,900,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	10 0. 8 GBP	—	—	—	—	—	—	—	—	—	—	—	—