The amount of liabilities relating to investment contracts that fall within the scope of IAS 39 or IFRS 9.

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

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

Investment Contracts - Additional Information (Detail) € in Millions, £ in Billions	Dec. 31, 2018 EUR (€)	Dec. 31, 2018 GBP (£)	Dec. 31, 2017 EUR (€)
Disclosure of investment contracts general account [Line Items]
Investment contracts liabilities	€ 18,048		€ 16,943
BlackRock Part VII [member]
Disclosure of investment contracts general account [Line Items]
Investment contracts liabilities	€ 18,400	£ 16.3