v3.25.2
Document And Entity Information - shares
6 Months Ended
Jun. 30, 2025
Jul. 25, 2025
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-34910  
Entity Registrant Name HUNTINGTON INGALLS INDUSTRIES, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 90-0607005  
Entity Address, Address Line One 4101 Washington Avenue  
Entity Address, City or Town Newport News  
Entity Address, State or Province VA  
Entity Address, Postal Zip Code 23607  
City Area Code 757  
Local Phone Number 380-2000  
Title of 12(b) Security Common Stock  
Trading Symbol HII  
Security Exchange Name NYSE  
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   39,240,631
Amendment Flag false  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Entity Central Index Key 0001501585  
Current Fiscal Year End Date --12-31