Statement Of Financial Position [Abstract]

Pennon Group PLC - Filing #6458173

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 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 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	As at 2023-03-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	5,849,400,000 GBP	—	—	—	—	—	—	—	—	5,374,300,000 GBP	—	—	—	—	—	—
Goodwill	—	—	179,900,000 GBP	—	—	—	—	—	—	—	—	179,900,000 GBP	—	—	—	—	—	—
Intangible assets other than goodwill	—	—	62,200,000 GBP	—	—	—	—	—	—	—	—	60,300,000 GBP	—	—	—	—	—	—
Current tax assets	—	—	900,000 GBP	—	—	—	—	—	—	—	—	6,000,000 GBP	—	—	—	—	—	—
Deferred tax assets	—	—	– GBP	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	—	—
Cash and cash equivalents	—	—	417,900,000 GBP	—	—	—	—	—	—	—	—	134,000,000 GBP	—	132,300,000 GBP	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	288,100,000 GBP	—	—	—	—	—	—	—	—	174,600,000 GBP	—	—	—	—	—	—
Share premium	—	—	755,000,000 GBP	—	—	—	—	—	—	—	—	398,200,000 GBP	—	—	—	—	—	—
Equity attributable to owners of parent	—	—	1,448,200,000 GBP	—	—	—	—	—	—	—	—	1,161,200,000 GBP	—	—	—	—	—	—
Non-controlling interests	—	—	2,500,000 GBP	—	—	—	—	—	—	—	—	1,400,000 GBP	—	—	—	—	—	—
Equity	288,100,000 GBP	248,000,000 GBP	1,450,700,000 GBP	2,500,000 GBP	157,100,000 GBP	755,000,000 GBP	431,300,000 GBP	1,400,000 GBP	398,200,000 GBP	174,600,000 GBP	157,100,000 GBP	1,162,600,000 GBP	570,600,000 GBP	1,125,200,000 GBP	159,500,000 GBP	400,000 GBP	157,100,000 GBP	237,600,000 GBP
Liabilities [abstract]
Current tax liabilities	—	—	– GBP	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	—	—
Deferred tax liabilities	—	—	530,600,000 GBP	—	—	—	—	—	—	—	—	548,400,000 GBP	—	—	—	—	—	—