Statement Of Financial Position [Abstract]

Severn Trent PLC - Filing #7157678

Concept	As at 2025-03-31	As at 2025-03-31	As at 2025-03-31	As at 2025-03-31	As at 2025-03-31	As at 2024-03-31	As at 2024-03-31	As at 2024-03-31	As at 2024-03-31	As at 2024-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	—	13,307,200,000 GBP	—	—	—	—	—	11,766,900,000 GBP	—	—	—	—	—
Right-of-use assets	—	—	—	141,000,000 GBP	—	—	—	—	—	143,000,000 GBP	—	—	—	—	—
Goodwill	—	—	—	117,300,000 GBP	—	—	—	—	—	112,800,000 GBP	—	—	—	—	—
Intangible assets other than goodwill	—	—	—	206,500,000 GBP	—	—	—	—	—	186,500,000 GBP	—	—	—	—	—
Investments in subsidiaries, joint ventures and associates reported in separate financial statements	—	—	—	– GBP	—	—	—	—	—	– GBP	—	—	—	—	—
Current tax assets	—	—	—	– GBP	—	—	—	—	—	– GBP	—	—	—	—	—
Deferred tax assets	—	—	—	– GBP	—	—	—	—	—	– GBP	—	—	—	—	—
Cash and cash equivalents	—	—	—	1,048,100,000 GBP	—	—	—	—	—	953,200,000 GBP	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	—	296,300,000 GBP	—	—	—	—	—	295,400,000 GBP	—	—	—	—	—
Retained earnings	—	—	—	78,100,000 GBP	—	—	—	—	—	7,900,000 GBP	—	—	—	—	—
Share premium	—	—	—	1,378,300,000 GBP	—	—	—	—	—	1,363,100,000 GBP	—	—	—	—	—
Other reserves	—	—	—	174,300,000 GBP	—	—	—	—	—	167,600,000 GBP	—	—	—	—	—
Equity	296,300,000 GBP	174,300,000 GBP	78,100,000 GBP	1,770,800,000 GBP	1,378,300,000 GBP	167,600,000 GBP	7,900,000 GBP	1,363,100,000 GBP	295,400,000 GBP	1,834,000,000 GBP	970,600,000 GBP	408,700,000 GBP	249,100,000 GBP	162,500,000 GBP	150,300,000 GBP
Liabilities [abstract]
Current tax liabilities	—	—	—	400,000 GBP	—	—	—	—	—	900,000 GBP	—	—	—	—	—
Deferred tax liabilities	—	—	—	1,472,100,000 GBP	—	—	—	—	—	1,364,500,000 GBP	—	—	—	—	—