Borrowings Dividends received from associates Issued capital Dividends paid Components of profit or loss [Axis] Components of profit or loss Profit for the period Assets Adjustments for: Statement of profit or loss [Table] Statement of profit or loss [Table] Statement of profit or loss Financial assets at fair value through other comprehensive income Dividends received from equity investments Dividends received from equity investments Profit attributable to: Net treasury income through CCP business Net treasury income through CCP business Interest received Interest Received Classified As Financing Activities Interest Received Classified As Financing Activities Contract liabilities Comprehensive income attributable to non-controlling interests Fair value reserve of financial assets at FVOCI Clearing business liabilities Clearing business liabilities Non-cash exchange (losses)/gains on cash and cash equivalents Share premium Retained earnings Total profit or loss [Member] Total profit or loss [Member] Total profit or loss Current Trade and other payables Current Trade and other payables Current Income tax liabilities Disclosure of non-underlying items [Text Block] Disclosure of non-underlying items Investments in associates and joint ventures Current assets Other Long Term Provisions And Provisions For Other Long Term Employee Benefit Expenses Other Long Term Provisions And Provisions For Other Long Term Employee Benefit Expenses Other Long Term Provisions And Provisions For Other Long Term Employee Benefit Expenses Underlying items [Member] Underlying items [Member] Underlying items Lease liabilities Clearing business assets Clearing business assets Income tax impact on exchange differences on translation of foreign operations Cash flow from financing activities Increase (decrease) from delivery of shares Increase (decrease) from delivery of shares Share based payments Share based payments Other comprehensive income for the year Lease liabilities Employee share transactions Employee share transactions Equity Non-current assets Equity and liabilities Derivative financial Instruments Total Shareholders' equity Non-controlling interests Comprehensive income attributable to owners of the parent Total other reserves Net cash generated by operating activities Proceeds from sale of property, plant and equipment and intangible assets Contract liabilities Reserve own shares Financial assets at amortised cost Profit before income tax Non-underlying items [Member] Non-underlying items [Member] Non-underlying items Goodwill and other intangible assets Trade and other receivables Settlement of derivatives financial instruments Settlement of derivatives financial instruments Share-based payments Tax expense (income) Net (decrease)/increase in cash and cash equivalents Description of accounting policy for non-underlying items [Text Block] Description of accounting policy for non-underlying items Changes in working capital and provisions Changes in working capital and provisions Changes in working capital and provisions Non-current liabilities Net cash (used in) investing activities Revenue and other operating income Statement of profit or loss [Line Items] Statement of profit or loss [Line Items] Cash flow from investing activities Current liabilities Other non-current assets and other assets Foreign currency translation reserve Adjustments for undistributed share of profit from associates and joint ventures, and impairments thereof Adjustments for undistributed share of profit from associates and joint ventures, and impairments thereof Adjustments for undistributed share of profit from associates and joint ventures, and impairments thereof Depreciation and amortisation Statement of profit or loss [Member] Statement of profit or loss Derivative financial liabilities Repayments of borrowings, net of transaction fees Borrowings Dividends paid to non-controlling interests Transactions in own shares Comprehensive income attributable to: Net cash (used in) financing activities Share of profit (loss) of investments accounted for using the equity method and impairments thereof Share of net profit/(loss) of associates and joint ventures accounted for using the equity method, and impairments thereof Acquisition of subsidiaries, net of cash acquired Acquisition of associates Acquisition of associates Acquisition of associates Cash flow from operating activities Equity