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Note 7 VaR by Risk factor (Details) - EUR (€)
€ in Millions

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

€ 27

€ 29

€ 27

VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

36

36

39

VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

19

22

18

End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

29

31

28

Interest spread risk [Member] | VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

33

33

29

Interest spread risk [Member] | VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

35

32

39

Interest spread risk [Member] | VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

25

27

20

Interest spread risk [Member] | End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

32

34

32

Currency risk [member] | VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

8

10

12

Currency risk [member] | VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

12

13

20

Currency risk [member] | VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

10

9

3

Currency risk [member] | End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

13

9

12

Stock market risk [Member] | VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

3

2

4

Stock market risk [Member] | VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

2

4

10

Stock market risk [Member] | VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

2

1

1

Stock market risk [Member] | End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

7

5

2

Vega Correlation risk [Member] | VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

7

11

11

Vega Correlation risk [Member] | VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

11

1

20

Vega Correlation risk [Member] | VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

11

10

6

Vega Correlation risk [Member] | End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

5

11

11

Diversification effect [Member] | VaR average in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

^[1]

(23)

(28)

(28)

Diversification effect [Member] | VaR max in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

^[1]

(24)

(14)

(14)

Diversification effect [Member] | VaR min in the year [Member]

VaR by risk factor [Line Items]

VaR by risk factor

^[1]

(28)

(25)

(39)

Diversification effect [Member] | End of period VaR [Member]

VaR by risk factor [Line Items]

VaR by risk factor

^[1]

€ (28)

€ (29)

€ (29)

[1]	(1) The diversification effect is the difference between the sum of the average individual risk factors and the total VaR figure that includes the implied correlation between all the variables and scenarios used in the measurement.