v3.25.4
Cover - shares
 9 Months Ended
Sep. 30, 2025
Oct. 28, 2025
Cover [Abstract]    
Document Type 10-Q/A  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 001-41565  
Entity Registrant Name Leonardo DRS, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 13-2632319  
Entity Address, Address Line One 2345 Crystal Drive  
Entity Address, Address Line Two Suite 1000  
Entity Address, City or Town Arlington  
Entity Address, State or Province VA  
Entity Address, Postal Zip Code 22202  
City Area Code 703  
Local Phone Number 416-8000  
Title of 12(b) Security Common stock, $0.01 par value  
Trading Symbol DRS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   266,026,725
Amendment Flag true  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001833756  
Current Fiscal Year End Date --12-31  
Amendment Description Leonardo DRS, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-Q/A (this “Amendment”) to its Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, which was originally filed with the Securities and Exchange Commission (the “Commission”) on October 29, 2025 (the “Original Filing”). This Amendment is being filed to amend Part II “Item 5. Other Information” of the Original Filing to include information concerning a Rule 10b5-1 trading arrangement adopted by Sally A. Wallace on August 6, 2025 that was inadvertently omitted from the Original Filing.In addition, as required by Rule 12b-15 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), new certifications by the Company’s principal executive officer and principal financial officer are filed herewith as exhibits to this Amendment, under Item 6 hereof, pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act. Because no 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. The Company is also not including new certifications under Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C.1350) (Section 906 of the Sarbanes-Oxley Act of 2002), as no financial statements are being filed with this Amendment.Other than as expressly set forth herein, this Amendment does not, and does not purport to, amend, update or restate the information in the Original Filing or reflect any events that have occurred after the Original Filing was made. Information not affected by this Amendment remains unchanged and reflects the disclosures made at the time as of which the Original Filing was made. No changes have been made to the financial statements of the Company as contained in the Original Filing. Accordingly, this Amendment should be read together with the Original Filing and the Company’s other filings with the Commission.