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Cover
 12 Months Ended
Dec. 31, 2024
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2024
Current Fiscal Year End Date --12-31
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-14642
Entity Registrant Name ING GROEP NV
Entity Incorporation, State or Country Code P7
Entity Address, Address Line One Bijlmerdreef 106
Entity Address, Postal Zip Code 1102 CT
Entity Address, City or Town Amsterdam
Entity Address, Country NL
Entity Common Stock, Shares Outstanding 3,147,391,173
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction false
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Document Fiscal Year Focus 2024
Document Fiscal Period Focus FY
Amendment Flag false
Entity Central Index Key 0001039765
Other Address  
Document Information [Line Items]  
Entity Address, Address Line One P.O. Box 1800
Entity Address, Postal Zip Code 1000 BV
Entity Address, City or Town Amsterdam
Entity Address, Country NL
Business Contact  
Document Information [Line Items]  
Contact Personnel Name Erwin Olijslager
Country Region 31
City Area Code 20
Local Phone Number 564 7705
Contact Personnel Email Address Erwin.Olijslager@ing.com
Entity Address, Address Line One Bijlmerdreef 106
Entity Address, Postal Zip Code 1102 CT
Entity Address, City or Town Amsterdam
Entity Address, Country NL
American Depositary Shares  
Document Information [Line Items]  
Title of 12(b) Security American Depositary Shares
Trading Symbol ING
Security Exchange Name NYSE
Ordinary shares  
Document Information [Line Items]  
Title of 12(b) Security Ordinary shares
No Trading Symbol Flag
Security Exchange Name NYSE
3.950% Fixed Rate Senior Notes due 2027  
Document Information [Line Items]  
Title of 12(b) Security 3.950% Fixed Rate Senior Notes due 2027
Trading Symbol ING27
Security Exchange Name NYSE
4.550% Fixed Rate Senior Notes due 2028  
Document Information [Line Items]  
Title of 12(b) Security 4.550% Fixed Rate Senior Notes due 2028
Trading Symbol ING28
Security Exchange Name NYSE
4.050% Fixed Rate Senior Notes due 2029  
Document Information [Line Items]  
Title of 12(b) Security 4.050% Fixed Rate Senior Notes due 2029
Trading Symbol ING29
Security Exchange Name NYSE
1.726% Callable Fixed-to-Floating Rate Senior Notes due 2027  
Document Information [Line Items]  
Title of 12(b) Security 1.726% Callable Fixed-to-Floating Rate Senior Notes due 2027
Trading Symbol ING27A
Security Exchange Name NYSE
2.727% Callable Fixed-to-Floating Rate Senior Notes due 2032  
Document Information [Line Items]  
Title of 12(b) Security 2.727% Callable Fixed-to-Floating Rate Senior Notes due 2032
Trading Symbol ING32
Security Exchange Name NYSE
Callable Floating Rate Senior Notes due 2027  
Document Information [Line Items]  
Title of 12(b) Security Callable Floating Rate Senior Notes due 2027
Trading Symbol ING27B
Security Exchange Name NYSE
4.017% Callable Fixed-to-Floating Rate Senior Notes due 2028  
Document Information [Line Items]  
Title of 12(b) Security 4.017% Callable Fixed-to-Floating Rate Senior Notes due 2028
Trading Symbol ING28A
Security Exchange Name NYSE
3.869% Callable Fixed-to-Floating Rate Senior Notes due 2026  
Document Information [Line Items]  
Title of 12(b) Security 3.869% Callable Fixed-to-Floating Rate Senior Notes due 2026
Trading Symbol ING26
Security Exchange Name NYSE
4.252% Callable Fixed-to-Floating Rate Senior Notes due 2033  
Document Information [Line Items]  
Title of 12(b) Security 4.252% Callable Fixed-to-Floating Rate Senior Notes due 2033
Trading Symbol ING33
Security Exchange Name NYSE
Callable Floating Rate Senior Notes due 2026  
Document Information [Line Items]  
Title of 12(b) Security Callable Floating Rate Senior Notes due 2026
Trading Symbol ING26A
Security Exchange Name NYSE
6.083% Callable Fixed-to-Floating Rate Senior Notes due 2027  
Document Information [Line Items]  
Title of 12(b) Security 6.083% Callable Fixed-to-Floating Rate Senior Notes due 2027
Trading Symbol ING27C
Security Exchange Name NYSE
$500,000,000 Callable Floating Rate Senior Notes due 2027  
Document Information [Line Items]  
Title of 12(b) Security $500,000,000 Callable Floating Rate Senior Notes due 2027
Trading Symbol ING27D
Security Exchange Name NYSE
$1,250,000,000 6.114% Callable Fixed-to-Floating Rate Senior Notes due 2034  
Document Information [Line Items]  
Title of 12(b) Security $1,250,000,000 6.114% Callable Fixed-to-Floating Rate Senior Notes due 2034
Trading Symbol ING34
Security Exchange Name NYSE
5.335% Callable Fixed-to-Floating Rate Senior Notes due 2030  
Document Information [Line Items]  
Title of 12(b) Security 5.335% Callable Fixed-to-Floating Rate Senior Notes due 2030
Trading Symbol ING30
Security Exchange Name NYSE
5.550% Callable Fixed-to-Floating Rate Senior Notes due 2035  
Document Information [Line Items]  
Title of 12(b) Security 5.550% Callable Fixed-to-Floating Rate Senior Notes due 2035
Trading Symbol ING35
Security Exchange Name NYSE