Increase (decrease) by allocation of accumulated profit Loss on share premium Cash flows from (used in) financing activities [total] Equity at end of period Treasury shares [member] Statement of changes in equity [line items] Adjustments Effect IFRS 16 Equity Cash and cash equivalents at beginning of period Increase (decrease) through treasury share transactions, equity Reserves and retained earnings Increase (decrease) through other changes, equity Number Of Shares Issued at beginning of period Cash flow from operations after cost of net debt and income tax expense Cash and cash equivalents if different from statement of financial position at end of period Repayment of borrowings excluding BPI Other Reserves [Member] Adjustments effect IFRS 16 Repayments of borrowings BPI Cash and cash equivalents if different from statement of financial position Cash flows from (used in) operating activities [total] Reserve Of Exchange Differences On Translation [Member] Components of equity [axis] Statement of changes in equity [abstract] Cash and cash equivalents Cash flows from (used in) operations before changes in working capital [total] Number Of Shares Issued Cash flows from (used in) investing activities [total] Proceeds from liquidity contract Réserve de réévaluation des régimes à prestations définies [Membre] Cash and cash equivalents at end of period Other Comprehensive Income Net Of Tax Gains Losses On Remeasurements Of Defined Benefit Plans Cash flows used in obtainingor losing control of subsidiarie Statement of changes in equity [table] Changes in cash and cash equivalents [abstract] Current trade receivable and contract assets Issue of equity for free shares Issued capital [member] Increase Decrease In Number Of Ordinary Shares Issued Comprehensive income Issue of equity other than for free shares Share premium [member] Cash and cash equivalents if different from statement of financial position at beginning of period Equity [member] Number Of Shares Issued at end of period Cash flow from operations after cost of net debt and income tax expense [total] Increase Decrease Through Share based Payment Transactions Profit (loss) Repayments of borrowings BPI Finance income (cost) [total] Equity at beginning of period