Coupon as of date.

No definition available.

Name:	aeg_CouponAsOfDate
Namespace Prefix:	aeg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Coupon interest rate.

+ References

No definition available.

+ Details

Name:	aeg_CouponInterestRate
Namespace Prefix:	aeg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items of other equity instruments.

+ References

No definition available.

+ Details

Name:	aeg_DisclosureOfOtherEquityInstrumentsLineItems
Namespace Prefix:	aeg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maturity of borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_7&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_BorrowingsMaturity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The currency in which the borrowings are denominated. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_BorrowingsOriginalCurrency
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=aeg_PerpetualCumulativeSubordinatedBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_ParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=aeg_RangeSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=aeg_RangeEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=aeg_RangeNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Other Equity Instruments - Summary of Coupon Details - Perpetual Cumulative Subordinated Bonds (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other equity instruments [line items]
Borrowings	€ 12,061	€ 13,635
Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [line items]
Borrowings	454	454	€ 454
Perpetual cumulative subordinated bonds [member] \| Aegon N.V [member]
Disclosure of other equity instruments [line items]
Borrowings	€ 454	454
Perpetual cumulative subordinated bonds [member] \| EUR 203 million [member]
Disclosure of other equity instruments [line items]
Coupon rate	4.26%
Borrowings original currency	EUR
Coupon date	Annual, March 4
Year of next call	2021
Borrowings	€ 203	203	203
Perpetual cumulative subordinated bonds [member] \| EUR 203 million [member] \| Aegon N.V [member]
Disclosure of other equity instruments [line items]
Coupon rate	4.26%
Borrowings original currency	EUR
Coupon date	Annual, March 4
Year of next call	2021
Borrowings	€ 203	203
Perpetual cumulative subordinated bonds [member] \| EUR 114 million [member]
Disclosure of other equity instruments [line items]
Coupon rate	1.506%
Borrowings original currency	EUR
Coupon date	Annual, June 8
Year of next call	2025
Borrowings	€ 114	114	114
Perpetual cumulative subordinated bonds [member] \| EUR 114 million [member] \| Aegon N.V [member]
Disclosure of other equity instruments [line items]
Coupon rate	1.506%
Borrowings original currency	EUR
Coupon date	Annual, June 8
Year of next call	2025
Borrowings	€ 114	114
Perpetual cumulative subordinated bonds [member] \| EUR 136 million [member]
Disclosure of other equity instruments [line items]
Coupon rate	1.425%
Borrowings original currency	EUR
Coupon date	Annual, October 14
Year of next call	2028
Borrowings	€ 136	136	€ 136
Perpetual cumulative subordinated bonds [member] \| EUR 136 million [member] \| Aegon N.V [member]
Disclosure of other equity instruments [line items]
Coupon rate	1.425%
Borrowings original currency	EUR
Coupon date	Annual, October 14
Year of next call	2028
Borrowings	€ 136	€ 136