Cash flow hedges reclassified and accounted for in net income [Abstract] Cash flow hedges reclassified and accounted for in net income Cash flows from (used in) operations before changes in working capital Foreign exchange gain (loss) Settlement of derivative financial instruments classified as financing activities Settlement of derivative financial instruments classified as financing activities Adjustments for gain (loss) on disposals, property, plant and equipment Disclosure of significant changes and transactions in the current reporting period [Text Block] Disclosure of significant changes and transactions in the current reporting period Net change in fair value of cost of hedging Net change in fair value of cost of hedging Income taxes paid (refund), classified as operating activities Payments of lease liabilities, classified as financing activities Cash flows from (used in) financing activities Adjustments for employer contributions to pension schemes Adjustments for employer contributions to pension schemes Cash flows from (used in) investing activities Handling, catering and other operating costs Handling, catering and other operating costs Hedges transferred and reported in inventory Hedges transferred and reported in inventory Payment to HMRC to appeal IAG Loyalty VAT Payment to HMRC to appeal IAG Loyalty VAT Adjustments for purchase of carbon-related assets net of the change in carbon-related obligations Adjustments for purchase of carbon-related assets net of the change in carbon-related obligations Other reserves including retained earnings Other reserves including retained earnings Reconciliation to total cash, cash equivalents and other interest-bearing deposits [Abstract] Reconciliation to total cash, cash equivalents and other interest-bearing deposits Total net non-operating costs Total net non-operating costs Total net non-operating costs Adjustments for pension scheme service costs Adjustments for pension scheme service costs Net currency retranslation credits / (charges) Net currency retranslation credits / (charges) Cash flows from (used in) operating activities Repayments of borrowings, classified as financing activities Cash flow hedges reclassified and reported in net profit: Currency differences Cash flow hedges reclassified and reported in net profit: Currency differences Cash flow hedges reclassified and reported in net profit: Currency differences Operating expense Remeasurements of post-employment benefit obligations Remeasurements of post-employment benefit obligations Tax expense (income) Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets Termination Settlement Payment Related to Purchase of Interest Termination Settlement Payment Related to Purchase of Interest Increase (decrease) in working capital Net financing credit / (charge) relating to pensions Net financing credit / (charge) relating to pensions Gains (losses) on disposals of property, plant and equipment Disclosure of impact of climate change on financial reporting [Text Block] Disclosure of impact of climate change on financial reporting Cash, cash equivalents and interest-bearing deposits Cash, cash equivalents and interest-bearing deposits Cash, cash equivalents and interest-bearing deposits Other non-operating credits / (charges) Other non-operating credits / (charges) Hedges transferred and reported in sales in advance of carriage Hedges transferred and reported in sales in advance of carriage Cash flow hedges reclassified and reported in net profit: Fuel costs and emissions charges Cash flow hedges reclassified and reported in net profit: Fuel costs and emissions charges Cash flow hedges reclassified and reported in net profit: Fuel costs and emissions charges Property, IT and other costs Property, IT and other costs Cash flow hedges reclassified and reported in net profit: Ineffectiveness recognised in other non-operating costs Cash flow hedges reclassified and reported in net profit: Ineffectiveness recognised in other non-operating costs Cash flow hedges reclassified and reported in net profit: Ineffectiveness recognised in other non-operating costs Dividends paid, classified as financing activities Interest-bearing deposits maturing after more than three months Interest-bearing deposits maturing after more than three months Interest paid, classified as operating activities Remeasurements of long-term employee-related provisions Remeasurements of long-term employee-related provisions Cost of hedging reclassified and reported in net profit Cost of hedging reclassified and reported in net profit Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Cash flow hedges reclassified and reported in net profit: Finance costs Cash flow hedges reclassified and reported in net profit: Finance costs Cash flow hedges reclassified and reported in net profit: Finance costs