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Debt securities in issue (Tables)	6 Months Ended
Debt securities in issue (Tables)	Jun. 30, 2022
Debt securities in issue [Abstract]
Summary of changes in debt securities in issue	Changes in debt securities in issue in EUR million 30 June 2022 31 December 2021 Opening balance 91,784 82,065 Additions 50,085 85,113 Redemptions / Disposals -46,591 -76,150 Exchange rate differences 2,817 2,771 Other movements -4,972 -2,014 Closing balance 93,123 91,784