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Insider Trading Arrangements - shares
 3 Months Ended
Feb. 23, 2024
Feb. 22, 2024
Dec. 31, 2023
Trading Arrangements, by Individual      
Material Terms of Trading Arrangement    

Trading Plans: During the quarter ended December 31, 2023, no director or Section 16 officer adopted or terminated any Rule 10b5-1 trading arrangements or non-Rule 10b5-1 trading arrangements (as defined in Item 408(a) of Regulation S-K).

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On February 23, 2024, Matthew J. Cox, Chairman and Chief Executive Officer, adopted a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) to sell up to 39,204 shares of Matson common stock through December 31, 2024, subject to certain pricing and other conditions.

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On February 22, 2024, Joel M. Wine, Executive Vice President and Chief Financial Officer, adopted a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) to sell up to 76,156 shares of Matson common stock through July 31, 2024, subject to certain pricing and other conditions.

Rule 10b5-1 Arrangement Adopted     false
Non-Rule 10b5-1 Arrangement Adopted     false
Rule 10b5-1 Arrangement Terminated     false
Non-Rule 10b5-1 Arrangement Terminated     false
Matthew J. Cox      
Trading Arrangements, by Individual      
Name Matthew J. Cox    
Title Chairman and Chief Executive Officer    
Rule 10b5-1 Arrangement Adopted true    
Adoption Date February 23, 2024    
Aggregate Available 39,204    
Expiration Date December 31, 2024    
Joel M. Wine      
Trading Arrangements, by Individual      
Name   Joel M. Wine  
Title   Executive Vice President and Chief Financial Officer  
Rule 10b5-1 Arrangement Adopted   true  
Adoption Date   February 22, 2024  
Aggregate Available   76,156  
Expiration Date   July 31, 2024