Additional cash contributions to plan.

No definition available.

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- Definition

Defined benefit contribution paid.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Defined benefit plan target asset allocation percentage.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan target liability allocation percentage.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plans deficit

+ References

No definition available.

+ Details

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- Definition

Defined benefit unfunded plans.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Number of pension plans.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The retirement age used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_144&doctype=Standard
-URIDate 2018-03-16

+ Details

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Balance Type:	na
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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.

+ Details

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Balance Type:	na
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- Definition

The amount of employer contributions to retirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2018-01-01
-Paragraph 35
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=26&date=2018-03-01&anchor=para_35_b_i&doctype=Standard
-URIDate 2018-03-16

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount that investment funds constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]; Investment funds [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 142
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_142_f&doctype=Standard
-URIDate 2018-03-16

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 140
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard
-URIDate 2018-03-16

+ Details

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- Definition

The amount that other types of assets not separately disclosed constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 142
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_142&doctype=Standard
-URIDate 2018-03-16

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_57_a&doctype=Standard
-URIDate 2018-03-16

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 147
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_147_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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- Details

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- Details

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- Details

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- Details

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Defined Benefit Plans - Additional Information (Detail) € in Millions	1 Months Ended		12 Months Ended
	Sep. 30, 2018 EUR (€)	Sep. 30, 2017 EUR (€)	Dec. 31, 2018 EUR (€) yr Plans	Dec. 31, 2017 EUR (€) yr	Jan. 01, 2018 yr	Dec. 31, 2016 EUR (€)
Disclosure of defined benefit plans [Line Items]
Defined benefit plans deficit			€ 450	€ (629)
Plan benefit liability			3,989	3,950		€ 4,767
Unfunded amount of defined benefit plans			1,956	2,032
Unfunded amount of other post employment defined benefit plans			€ 484	397
Retirement age \| yr			67
Defined benefit plan deficit			€ (502)	(767)
Aegon United Kingdom [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plan deficit			51	137
Contributions were paid into scheme			55	87
Additional contribution				34
Plan Amendment Average Life Expectancy [member]
Disclosure of defined benefit plans [Line Items]
Retirement age \| yr					68
United States [member] \| Supplemental pension and retirement plan [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plans unfunded			241	257
United States [member] \| Post employment healthcare benefits [member]
Disclosure of defined benefit plans [Line Items]
Plan benefit liability			€ 210	€ 227
Aegon United Kingdom [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation \| yr			21.6	23.1
Percentage of investment assets allocation in primary equities			30.00%
Percentage of investment liability allocation in fixed interest and inflation-linked bonds and related derivatives			70.00%
Transamerica Corporation [member]
Disclosure of defined benefit plans [Line Items]
Employer contribution to pension plan	€ 190	€ 89
Aegon United States of America [member]
Disclosure of defined benefit plans [Line Items]
Number of benefit plans \| Plans			2
Remaining average duration of defined benefits obligation \| yr			12.2	13.2
Aegon Nederland N.V. [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation \| yr			11.7	11.9
Unfunded amount of other post employment defined benefit plans			€ 65	€ 65
Aegon Nederland N.V. [member] \| Unfunded [member] \| Life insurance general account [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation \| yr			20.9	19.6
Unfunded amount of defined benefit plans			€ 2,967	€ 2,628