Interest paid on lease liabilities Other reserves and retained earnings Change of parent company: remove Havas SA Personnel costs excluding performance share payments Transactions on borrowings [total] Effect of hyperinflation Increase (decrease) in cash and cash equivalents after effect of exchange rate changes [total] Transactions on borrowings Cash flows from (used in) operating activities [total] Change in number of shares reverse share split Current earn-out and non-controlling interest buy-out obligations Short-term borrowings, excluding borrowing from Vivendi SE Interest paid on borrowings Purchase of intangible and tangible assets Commitment share-buyback program Cash and cash equivalents if different from statement of financial position at begining of period Effect of acquisitions and commitments to buy out non controlling interests Cash and cash equivalents if different from statement of financial position at end of period Reverse share split Number of shares issued at end of period Elimination of finance costs Change of parent company: Havas NV Change in loan to Vivendi SE Non-current earn-out and non-controlling interest buy-out obligations Change in number of shares : remove Havas SA Transactions with shareholders [total] Finance income (cost) [total] Increase / (decrease) in share equity Change in number of shares : Havas NV Net cost of debt (interest) Changes in cash and cash equivalents [Abstract] Cash flows from (used in) investing activities [total] Cash flows from (used in) financing activities [total] Transactions with shareholders Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets [total] Proceeds from disposals of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets [total] Number of shares issued at begining of period Proceeds from Sale and repayment of intangible and tangible assets Changes in number of shares issued [Abstract] Costs rebilled to customers Historical adjustment Increase (decrease) in working capital [total] Payments for buy-out of non-controlling interests