Document and Entity Information
6 Months Ended
Jun. 30, 2018
Document and Entity Information  
Entity Registrant Name Matson, Inc.
Entity Central Index Key 0000003453
Document Type 10-Q
Document Period End Date Jun. 30, 2018
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 42,697,456
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q2