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Transfers of Financial Assets - Summary of Securities Lending (Detail) - Securities lending [member] - EUR (€) € in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
Carrying amount of transferred financial assets	€ 2,734	€ 3,718
Fair value of cash collateral received	2,146	2,480
Fair value of non-cash collateral received	780	1,356
Net exposure	(192)	(117)
Non-cash collateral that can be sold or repledged in the absence of default	618	1,171
Non-cash collateral that has been sold or transferred

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Financial instruments sold or re pledged as collateral at fair value.

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The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]]

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The fair value of collateral sold or repledged that was permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]]

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The amount of non-cash collateral assets (such as debt or equity instruments) provided to a transferee, for which the transferee has the right by contract or custom to sell or repledge the collateral.

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