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Proposal for Profit Appropriation - Summary of Proposal for Profit Appropriation (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of proposal profit appropriation [Line Items]      
Owners of Aegon N.V. € 1,239 € 710 € 2,469
Aegon N.V [member]      
Disclosure of proposal profit appropriation [Line Items]      
Final dividend on common shares 329 307  
Earnings to be retained 910 403  
Owners of Aegon N.V. € 1,239 € 710 € 2,469