Consolidated income statement [axis] Before exceptional items and remeasurements [member] Exceptional items and remeasurements [member] Total [member] Profit or loss [table] Profit or loss [line items] Net losses in respect of cash flow hedging of capital expenditure Net gains/(losses) in respect of cost of hedging Other comprehensive income/(loss) for the year, net of tax from continuing operations Other comprehensive income/(loss) for the year, net of tax from discontinued operations Total comprehensive income for the year from continuing operations Total comprehensive income for the year from discontinued operations Comprehensive income attributable to equity shareholders of the parent from continuing operations Comprehensive income attributable to equity shareholders of the parent from discontinued operations Scrip dividend-related share issue Cash flow hedges transferred to the statement of financial position, net of tax Transfer of accumulated gains and losses on sale of equity investments Accumulated losses transferred to retained earnings on disposal Adjustments for exceptional items and remeasurements Adjustments for cash flows relating to exceptional items Disposal of interest in the UK Gas Transmission business2 classified as investing activities Disposal of interest in The Narragansett Electric Company2 classified as investing activities Disposal of interest in Millennium Pipeline Company LLC classified as investing activities Disposal of interest in St William Homes LLP classified as investing activities Net movements in short-term financial investments classified as investing activities Cash flows relating to exceptional items classified as investing activities Cash inflows on derivatives classified as financing activities Cash outflows on derivatives classified as financing activities Cash and cash equivalents if different from statement of financial position Cash and cash equivalents if different from statement of financial position Disclosure of disposal of the narragansett electric company Disclosure of disposal of the UK gas transmission business Description of accounting policy for impact of climate change and the transition of net zero Disclosure of exceptional items and remeasurements Description of accounting policy for other non-current assets Disclosure of contract liabilities Description of accounting policy for contract liabilities Description of accounting policy for other non-current liabilities Disclosure of sensitivities Description of accounting policy for sensitivities Disclosure of additional disclosures in respect of guaranteed securities Description of accounting policy for additional disclosures in respect of guaranteed securities