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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 13, 2026
Jun. 30, 2025
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Entity File Number 001-34187    
Entity Registrant Name Matson, Inc.    
Entity Incorporation, State or Country Code HI    
Entity Tax Identification Number 99-0032630    
Entity Address, Address Line One 1411 Sand Island Parkway    
Entity Address, City or Town Honolulu    
Entity Address, State or Province HI    
Entity Address, Postal Zip Code 96819    
City Area Code 808    
Local Phone Number 848-1211    
Title of 12(b) Security Common Stock, without par value    
Trading Symbol MATX    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   30,439,310  
Entity Public Float     $ 3,466,200,557
Documents Incorporated by Reference [Text Block]

The following document is incorporated by reference in Part III of the Annual Report on Form 10-K to the extent described therein: Proxy statement for the annual meeting of shareholders of Matson, Inc. to be held on April 23, 2026.

    
Auditor Name Deloitte & Touche LLP    
Auditor Location Honolulu, Hawaii    
Auditor Firm ID 34    
Entity Central Index Key 0000003453    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false