Cash flow from financing activities Profit for the period Components of profit or loss [Axis] Components of profit or loss Statement of profit or loss [Table] Statement of profit or loss [Table] Statement of profit or loss Comprehensive income attributable to owners of the parent Contract liabilities Share premium Dividends received from equity investments Dividends received from equity investments Net treasury income through CCP business Net treasury income through CCP business Components of equity Dividends paid Clearing business liabilities Clearing business liabilities Recognition of combined derivative instrument Recognition of combined derivative instrument Goodwill and other intangible assets Total profit or loss [Member] Total profit or loss [Member] Total profit or loss Current Trade and other payables Current Trade and other payables Other comprehensive income for the year Cash flow from investing activities Redemption of other current financial assets Redemption of other current financial assets Net cash (used in) financing activities Lease liabilities Non-current assets Disclosure of non-underlying items [Text Block] Disclosure of non-underlying items Depreciation and amortisation Equity 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 Asset acquisition Asset acquisition Asset acquisition Underlying items [Member] Underlying items [Member] Underlying items Net cash (used in) investing activities Clearing business assets Clearing business assets Equity and liabilities Increase (decrease) from delivery of shares Increase (decrease) from delivery of shares Share based payments Share based payments Contract liabilities Current assets Other income comparative adjustment Other income comparative adjustment Employee share transactions Employee share transactions Non-controlling interests Dividends received from associates Assets Transactions in own shares Trade and other receivables Fair value reserve of financial assets at FVOCI Net cash generated by operating activities Repayments of borrowings, classified as financing activities Adjustments for: Non-cash exchange (losses)/gains on cash and cash equivalents Revenue and other operating income Tax expense (income) Non-underlying items [Member] Non-underlying items [Member] Non-underlying items Dividends paid to non-controlling interests Purchase of other current financial assets Purchase of other current financial assets Reserve own shares 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 Acquisition of subsidiaries, net of cash acquired Comprehensive income attributable to non-controlling interests Statement of profit or loss [Line Items] Statement of profit or loss [Line Items] Lease liabilities Cash flow from operating activities Other non-current assets and other assets Profit attributable to: Financial assets at fair value through other comprehensive income Profit before income tax Adjustments for dividend income Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates 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 Statement of profit or loss [Member] Statement of profit or loss Non-current liabilities Issued capital Purchase of property, plant and equipment, classified as investing activities Current liabilities Comprehensive income attributable to: Share-based payments Total Shareholders' equity Retained earnings Foreign currency translation reserve 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 Income tax impact on exchange differences on translation of foreign operations Net (decrease)/increase in cash and cash equivalents Total other reserves Financial assets at amortised cost Current Income tax liabilities