Earnings Per Share - Summary of Basic Earnings Per Share (Detail) - EUR (€) € / shares in Units, € in Millions, shares in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per share [line items]
Owners of Aegon N.V.	€ 710	€ 2,469	€ 437
Coupons on perpetual securities	(102)	(103)	(105)
Coupons on non-cumulative subordinated notes	(11)	(28)	(28)
Net income / (loss) attributable to owners for basic earnings per share calculation	597	2,338	304
Net income / (loss) attributable to common shareholders	€ 593	€ 2,321	€ 302
Weighted average number of common shares B outstanding (in million)	2,036	2,042	2,048
Basic earnings per common share (EUR per share)	€ 0.29	€ 1.14	€ 0.15
Common share B [member]
Earnings per share [line items]
Net income / (loss) attributable to common shareholders	€ 4	€ 16	€ 2
Weighted average number of common shares B outstanding (in million)	571	575	575
Basic earnings per common share (EUR per share)	€ 0.01	€ 0.03

Coupons on non-cumulative subordinated notes.

No definition available.

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- Definition

Coupons on perpetual securities.

+ References

No definition available.

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- Definition

Profit (loss), attributable to owners of parent for basic earnings per share.

+ References

No definition available.

+ Details

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- Definition

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

+ References

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The profit (loss) attributable to ordinary equity holders of the parent equity. [Refer: Profit (loss)]

+ References

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- Definition

The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

+ References

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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

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