Cover

Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Dec. 31, 2023	Apr. 15, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39835
Entity Registrant Name	Benson Hill, Inc.
Entity Incorporation, State Code	DE
Entity Tax Identification Number	85-3374823
Entity Address, Address Line One	1001 North Warson Rd, Ste 300
Entity Address, City or Town	St. Louis,
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63132
City Area Code	(314)
Local Phone Number	222-8218
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	BHIL
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 247
Entity Common Stock, Shares Outstanding		211,998,120
Documents Incorporated by Reference	None.
Entity Central Index Key	0001830210
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	Benson Hill, Inc. (the “Company,” “Benson Hill,” “we,” “us” or “our”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to amend our Annual Report on Form 10-K for the year ended December 31, 2023, originally filed with the Securities and Exchange Commission (the “SEC”) on March 15, 2024 (the “Original 10-K”), to include the information required by Items 10 through 14 of Part III of Form 10-K. This Part III information was previously omitted from the Original 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference from our definitive proxy statement if such statement is filed no later than 120 days after our fiscal year-end. We are filing this Amendment to include Part III information in our Form 10-K because a definitive proxy statement containing such information may not be filed by Benson Hill within 120 days after the end of the fiscal year covered by the Original 10-K.In accordance with Rule 12b-15 under the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), Part III, Items 10 through 14 of the Original 10-K are hereby amended and restated in their entirety. Additionally, in accordance with Rules 12b-15 and 13a-14 under the Exchange Act, we have amended Part IV, Item 15 to include currently dated certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Since no new financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. Similarly, since no financial statements have been included in this Amendment, certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 have been omitted.Except for the changes to Part III and the filing of related certifications added to the list of Exhibits in Part IV, this Amendment makes no changes to the Original 10-K. This Amendment does not reflect events occurring after the filing of the Original 10-K or modify disclosures affected by subsequent events. Terms used but not otherwise defined in the Amendment have such meaning as ascribed to them in the Original 10-K.
Document Financial Statement Error Correction [Flag]	false

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Auditor Information [Abstract]
Auditor Name	Ernst & Young LLP
Auditor Location	St. Louis, Missouri
Auditor Firm ID	42