Consolidated companies and businesses acquired and divested - Additional information (Details) € in Billions	6 Months Ended
Jun. 30, 2022 EUR (€)
Consolidated companies and businesses acquired and divested [Line Items]
Amount of savings accounts transferred	€ 5.5

Disposal Group, Savings Accounts Transferred, Amount

No definition available.

Name:	ing_DisposalGroupSavingsAccountsTransferredAmount
Namespace Prefix:	ing_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration