| Cover Page | Nov. 04, 2021 | Jul. 08, 2021 |
| Entity Information [Line Items] | ||
| Document Type | 8-K | |
| Document Period End Date | Nov. 4, 2021 | |
| Entity Registrant Name | CHS Inc. | |
| Entity File Number | 001-36079 | |
| Entity Incorporation, State or Country Code | MN | |
| Entity Tax Identification Number | 41-0251095 | |
| Entity Address, Address Line One | 5500 Cenex Drive | |
| Entity Address, City or Town | Inver Grove Heights, | |
| Entity Address, State or Province | MN | |
| Entity Address, Postal Zip Code | 55077 | |
| City Area Code | (651) | |
| Local Phone Number | 355-6000 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000823277 | |
| Amendment Flag | false | |
| 8% Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | 8% Cumulative Redeemable Preferred Stock | |
| Trading Symbol | CHSCP | |
| Security Exchange Name | NASDAQ | |
| Class B, Series 1 Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | Class B Cumulative Redeemable Preferred Stock, Series 1 | |
| Trading Symbol | CHSCO | |
| Security Exchange Name | NASDAQ | |
| Class B, Series 2 Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | Class B Reset Rate Cumulative Redeemable Preferred Stock, Series 2 | |
| Trading Symbol | CHSCN | |
| Security Exchange Name | NASDAQ | |
| Class B, Series 3 Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | Class B Reset Rate Cumulative Redeemable Preferred Stock, Series 3 | |
| Trading Symbol | CHSCM | |
| Security Exchange Name | NASDAQ | |
| Class B, Series 4 Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | Class B Cumulative Redeemable Preferred Stock, Series 4 | |
| Trading Symbol | CHSCL | |
| Security Exchange Name | NASDAQ |
