Document and Entity Information
6 Months Ended
Jun. 30, 2019
Document and Entity Information  
Document Type 10-Q
Document Quarterly Report true
Document Transition Report false
Document Period End Date Jun. 30, 2019
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 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 42,855,015
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2019
Document Fiscal Period Focus Q2
Entity Central Index Key 0000003453
Amendment Flag false