Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 25, 2022
Jul. 02, 2021
Cover [Abstract]      
Document Type 10-K    
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 001-36341    
Entity Registrant Name Vectrus, Inc.    
Entity Incorporation, State or Country Code IN    
Entity Tax Identification Number 38-3924636    
Entity Address, Address Line One 2424 Garden of the Gods Road,    
Entity Address, City or Town Colorado Springs,    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80919    
City Area Code (719)    
Local Phone Number 591-3600    
Title of 12(b) Security Common Stock, Par Value $.01 Per Share    
Trading Symbol VEC    
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 false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 543,635,649
Entity Common Stock, Shares Outstanding   11,738,546  
Documents Incorporated by Reference Portions of Part III will be incorporated by reference in accordance with Instruction G(3) to Form 10-K no later than 120 days after the end of the registrant’s fiscal year.    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001601548