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Customer deposits - Additional information (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of customer deposits [line items]
Current accounts / Overnight deposits	€ 225,865	€ 221,773
Savings accounts	349,910	334,296
Time deposits	113,104	92,154
Private Individuals
Disclosure of customer deposits [line items]
Current accounts / Overnight deposits	106,497	107,711
Savings accounts	322,365	305,743
Time deposits	€ 50,834	€ 46,762

X

- References

No definition available.

+ Details

Name:	ing_CustomerAccountsOvernightDeposits
Namespace Prefix:	ing_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	ing_DisclosureOfCustomerDepositsLineItems
Namespace Prefix:	ing_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Customer accounts credit balances.

+ References

No definition available.

+ Details

Name:	ing_SavingsAccounts
Namespace Prefix:	ing_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Corporate deposits.

+ References

No definition available.

+ Details

Name:	ing_TimeDeposits
Namespace Prefix:	ing_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ing_CustomerDepositsByCustomerAxis=ing_PrivateIndividualsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: