Disclosure Of Income Tax [Text Block]

Severn Trent PLC - Filing #1912150

Concept	2022-04-01 to 2023-03-31	As at 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2022-04-01 to 2023-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	2021-04-01 to 2022-03-31	As at 2022-03-31
Disclosure of income tax [text block]	—	—	—	—	—		—	—	—	—	—	—
Major components of tax expense (income) [abstract]
Current tax expense (income) and adjustments for current tax of prior periods [abstract]
Current tax expense (income)	—	—	—	—	—	200,000 GBP	—	—	—	—	4,800,000 GBP	—
Tax expense (income)	—	—	—	—	—	35,700,000 GBP	—	—	—	—	361,300,000 GBP	—
Income tax relating to components of other comprehensive income [abstract]
Income tax relating to cash flow hedges included in other comprehensive income	600,000 GBP	—	– GBP	– GBP	– GBP	600,000 GBP	– GBP	– GBP	13,000,000 GBP	– GBP	13,000,000 GBP	—
Income tax relating to remeasurements of defined benefit plans included in other comprehensive income	– GBP	—	– GBP	– GBP	63,000,000 GBP	63,000,000 GBP	– GBP	47,100,000 GBP	– GBP	– GBP	47,100,000 GBP	—
Disclosure of temporary difference, unused tax losses and unused tax credits [text block]	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets and liabilities [abstract]
Deferred tax liabilities	—	1,293,500,000 GBP	—	—	—	—	—	—	—	—	—	1,320,600,000 GBP
Deferred tax expense (income) [abstract]
Deferred tax expense (income)	—	—	—	—	—	35,500,000 GBP	—	—	—	—	366,100,000 GBP	—
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Disclosure of information about Pillar Two income taxes [abstract]
Disclosure of statement that information is not known or reasonably estimable and entity's progress in assessing exposure to Pillar Two income taxes [text block]	—	—	—	—	—	—	—	—	—	—	—	—