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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 03, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-33784    
Entity Registrant Name SANDRIDGE ENERGY, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-8084793    
Entity Address, Address Line One 1 E. Sheridan Ave, Suite 500    
Entity Address, City or Town Oklahoma City    
Entity Address, State or Province OK    
Entity Address, Postal Zip Code 73104    
City Area Code 405    
Local Phone Number 429-5500    
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol SD    
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 Bankruptcy Proceedings, Reporting Current true    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 195.5
Entity Common Stock, Shares Outstanding   36,696,519  
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag true    
Entity Central Index Key 0001349436    
Amendment Description Sandridge Energy, Inc. (the “Company”) is filing this Amendment No. 1 to its Annual Report on Form 10-K (this “Amendment”) for the fiscal year ended December 31, 2021, which was originally filed with the Securities and Exchange Commission (“SEC”) on March 10, 2022 (the “Original Filing”). In response to an SEC comment letter dated June 30, 2022, this Amendment makes certain revisions to the Original Filing to reflect the following revisions:     •   Revise the consent of Deloitte & Touche LLP, which was inadvertently misdated in the Original Filing; and     •   Provide additional clarifying statements on assumptions used in regards to our reserves report filed in the Original Filing as Exhibit 99.1. We have made no changes to any volumetric, dollar value or other quantitative metric in our reserves report filed in the Original Filing as Exhibit 99.1. In addition, as required by Rule 12b-15 under the Securities Act of 1934, as amended, new certifications by the Company’s principal executive officer and principal financial officer are filed as exhibits to this Amendment under Part IV, “Item 15. Exhibits, Financial Statement Schedules” hereof. Except for the foregoing amended information or where otherwise noted, this Amendment does not reflect events that occurred after the Original Filing or modify or update those disclosures affected by subsequent events. This Amendment should be read in conjunction with the Original Filing.