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Premium Income and Premiums Paid to Reinsurers - Summary of Premium Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	€ 18,138	€ 19,316	€ 22,826
Life insurance general account [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	15,926	16,969	19,952
Non-life insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	2,212	2,346	2,874
Accident and health insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	1,823	1,979	2,511
General insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	€ 390	€ 367	€ 363

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- Definition

Disclosure of insurance premium revenue.

+ References

No definition available.

+ Details

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- Definition

The amount of income arising from insurance contracts. [Refer: Types of insurance contracts [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 4
-IssueDate 2019-01-01
-Paragraph 37
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_37_b&doctype=Standard&book=b
-URIDate 2019-03-27

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