Receivables - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of receivables [Line Items]
Income tax receivable	€ 102	€ 85
Aegon N.V [member]
Disclosure of receivables [Line Items]
Income tax receivable	€ 88	€ 130
Aegon N.V [member] | Top of range [member]
Disclosure of receivables [Line Items]
Receivables from group companies and other receivables, maturity	1 year