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Financial assets held for trading (Details 2) - Financial Assets At Fair Value Through Profit Or Loss Classified As Held For Trading Category [Member] € in Millions | 12 Months Ended
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Dec. 31, 2017 EUR (€)
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 6,212
Financial assets, at fair value | 6,012
Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 728
Financial assets, at fair value | 709
Quoted bonds issued by sovereign states, Floating rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 309
Financial assets, at fair value | 313
Quoted bonds issued by sovereign states [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 1,037
Financial assets, at fair value | 1,022
Other Bonds, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 3,501
Financial assets, at fair value | 3,356
Other Bonds, Fixed rate bonds [Member] | Quoted bonds issued by industrial companies [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 2,036
Financial assets, at fair value | € 1,922
External rating by moody's, grade | from Aaa to Baa3
External rating by SP, grade | from AAA to BBB-
Other Bonds, Fixed rate bonds [Member] | Quoted bonds issued by financial and insurance companies [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 1,437
Financial assets, at fair value | € 1,409
External rating by moody's, grade | from Aaa to Baa3
External rating by SP, grade | from AAA to BBB-
Other Bonds, Fixed rate bonds [Member] | Quoted bonds issued by supranational institutions [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 28
Financial assets, at fair value | € 25
External rating by moody's, grade | from Aaa to Aa3
External rating by SP, grade | from AAA to AA-
Other Bonds, Floating rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 1,674
Financial assets, at fair value | 1,634
Other Bonds, Floating rate bonds [Member] | Quoted bonds issued by industrial companies [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 789
Financial assets, at fair value | € 754
External rating by moody's, grade | from Aaa to Baa3
External rating by SP, grade | from AAA to BBB-
Other Bonds, Floating rate bonds [Member] | Quoted bonds issued by financial and insurance companies [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 840
Financial assets, at fair value | € 842
External rating by moody's, grade | from Aaa to Baa3
External rating by SP, grade | from AAA to BBB-
Other Bonds, Floating rate bonds [Member] | Quoted bonds issued by supranational institutions [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 45
Financial assets, at fair value | € 38
External rating by moody's, grade | from Aaa to Aa3
External rating by SP, grade | from AAA to AA-
Other Bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 5,175
Financial assets, at fair value | 4,990
Italy [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | 478
Financial assets, at fair value | € 477
External rating by moody's, grade | Baa2
External rating by SP, grade | BBB
Italy [Member] | Quoted bonds issued by sovereign states, Floating rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 300
Financial assets, at fair value | € 304
External rating by moody's, grade | Baa2
External rating by SP, grade | BBB
Spain [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 45
Financial assets, at fair value | € 41
External rating by moody's, grade | Baa2
External rating by SP, grade | BBB+
Poland [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 53
Financial assets, at fair value | € 52
External rating by moody's, grade | A2
External rating by SP, grade | BBB+
Slovenia [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 33
Financial assets, at fair value | € 34
External rating by moody's, grade | Baa1
External rating by SP, grade | A+
Ireland [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 10
Financial assets, at fair value | € 10
External rating by moody's, grade | A2
External rating by SP, grade | A+
Chile [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 8
Financial assets, at fair value | € 9
External rating by moody's, grade | Aa3
External rating by SP, grade | A+
Slovakia [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 5
Financial assets, at fair value | € 4
External rating by moody's, grade | A2
External rating by SP, grade | A+
Sweden [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 4
Financial assets, at fair value | € 4
External rating by moody's, grade | Aaa
External rating by SP, grade | AAA
United States of America [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 53
Financial assets, at fair value | € 45
External rating by moody's, grade | Aaa
External rating by SP, grade | AA+
United States of America [Member] | Quoted bonds issued by sovereign states, Floating rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 2
Financial assets, at fair value | € 2
External rating by moody's, grade | Aaa
External rating by SP, grade | AA+
Japan [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 25
Financial assets, at fair value | € 21
External rating by moody's, grade | A1
External rating by SP, grade | A+
Canada [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 11
Financial assets, at fair value | € 9
External rating by moody's, grade | Aaa
External rating by SP, grade | AAA
Netherlands [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 2
Financial assets, at fair value | € 2
External rating by moody's, grade | Aaa
External rating by SP, grade | AAA
South Korea [Member] | Quoted bonds issued by sovereign states, Fixed rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 1
Financial assets, at fair value | € 1
External rating by moody's, grade | Aa2
External rating by SP, grade | AA
Belgium [Member] | Quoted bonds issued by sovereign states, Floating rate bonds [Member] |
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items] |
Nominal Amount | € 7
Financial assets, at fair value | € 7
External rating by moody's, grade | Aa3
External rating by SP, grade | AA

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