| Cover | Oct. 28, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Entity Registrant Name | FEDERAL HOME LOAN BANK OF INDIANAPOLIS |
| Entity File Number | 000-51404 |
| Entity Tax Identification Number | 35-6001443 |
| Entity Incorporation, State or Country Code | X1 |
| Entity Address, Address Line One | 8250 Woodfield Crossing Blvd. |
| Entity Address, City or Town | Indianapolis |
| Entity Address, Postal Zip Code | 46240 |
| Local Phone Number | 465-0200 |
| City Area Code | (317) |
| Entity Address, State or Province | IN |
| Soliciting Material | false |
| Written Communications | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001331754 |
| Document Period End Date | Oct. 28, 2024 |
