| Cover | Apr. 28, 2022 |
| Cover [Abstract] | |
| Document Period End Date | Apr. 28, 2022 |
| Entity Registrant Name | Federal Home Loan Bank of Des Moines |
| Entity Incorporation, State or Country Code | X1 |
| Entity File Number | 000-51999 |
| Entity Tax Identification Number | 42-6000149 |
| Entity Address, Postal Zip Code | 50309 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001325814 |
| Entity Address, Address Line One | 909 Locust Street |
| Entity Address, State or Province | IA |
| Document Type | 8-K |
| City Area Code | 515 |
| Local Phone Number | 412-2100 |
| Entity Address, City or Town | Des Moines |
| Written Communications | false |
