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Note 8 - Fair Value - Reconciliation Of Changes In Fair Value Measurement - Acquisition, disposals and liquidation (Details)
€ in Millions
12 Months Ended
Dec. 31, 2018
EUR (€)
Acquisitions [Member]  
Fair value level 3 acquisition disposals liquidations line items  
Acquisition disposal liquidation assets € 2,400
Acquisition disposal liquidation Liabilities 2,716
Disposals [Member]  
Fair value level 3 acquisition disposals liquidations line items  
Acquisition disposal liquidation assets 254
Liquidations [Member]  
Fair value level 3 acquisition disposals liquidations line items  
Acquisition disposal liquidation assets 44
Acquisition disposal liquidation Liabilities € 5