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Investments - Summary of Investments for General Accounts Comprise Financial Assets Excluding Derivatives And Investments in Real Estate (Detail) - EUR (€)
€ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of investments in financial assets and real estate [abstract]      
Available-for-sale (AFS) € 84,675 € 88,170  
Loans 42,653 39,368  
Financial assets at fair value through profit or loss (FVTPL) 8,597 7,119  
Total financial assets, excluding derivatives 135,925 134,658  
Investments in real estate 2,700 2,147 € 1,999
Total investments for general account € 138,625 € 136,804