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Financial Risks - Schedule of Fair Values of Available-for-Sale (AFS) Instruments (Detail) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Fair values of available for sale instruments used [line items] |  |
Total fair value | € 148,570 | € 139,834
Total value of fair value through profit or loss | 9,080 | 8,597
Asset backed securities [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 0 | 4,503
Asset backed securities [member] | Level II [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 2,668 | 3,650
Asset backed securities [member] | Level III [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 664 | 853
Residential mortgage- backed securities [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 2,222 | 2,102
Residential mortgage- backed securities [member] | Level II [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 2,188 | 2,060
Residential mortgage- backed securities [member] | Level III [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total fair value | 34 | 42
Commercial mortgage- backed securities (CMBSs) [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total value of fair value through profit or loss | 3,427 | 3,314
Commercial mortgage- backed securities (CMBSs) [member] | Level II [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total value of fair value through profit or loss | € 3,427 | 3,310
Commercial mortgage- backed securities (CMBSs) [member] | Level III [member] | Americas [member] |  |
Fair values of available for sale instruments used [line items] |  |
Total value of fair value through profit or loss |  | € 4

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_a&doctype=Standard -URIDate 2019-03-27 + Details
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