Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 7.0	$ 18.1
Reconciling adjustments:
Depreciation and amortization	24.6	23.8
Deferred income taxes	2.9	3.0
Share-based compensation expense	2.6	2.8
Equity in income of related party Terminal Joint Venture	(4.9)	(2.6)
Other	(2.6)	(1.6)
Changes in assets and liabilities:
Accounts receivable, net	(8.4)	2.6
Deferred dry-docking payments	(15.1)	(13.2)
Deferred dry-docking amortization	11.5	8.1
Prepaid expenses and other assets	(1.1)	7.7
Accounts payable, accruals and other liabilities	(13.3)	(29.3)
Other long-term liabilities	0.8	0.4
Net cash provided by operating activities	4.0	19.8
Cash Flows From Investing Activities:
Capital expenditures	(22.9)	(30.6)
Capitalized vessel construction expenditures	(1.3)
Proceeds from disposal of property and equipment		0.5
Cash deposits into Capital Construction Fund	0.0	(12.5)
Net cash used in investing activities	(24.2)	(42.6)
Cash Flows From Financing Activities:
Repayments of debt and capital leases	(2.6)	(2.7)
Proceeds from revolving credit facility	100.0	97.0
Repayments of revolving credit facility	(56.0)	(43.0)
Proceeds from issuance of common stock	0.4	0.8
Dividends paid	(8.3)	(7.9)
Repurchase of Matson common stock	(0.7)	(20.8)
Tax withholding related to net share settlements of restricted stock units	(7.1)	(6.1)
Other	0.1	0.1
Net cash provided by financing activities	25.8	17.4
Net Increase (Decrease) in Cash and Cash Equivalents	5.6	(5.4)
Cash and Cash Equivalents, Beginning of the Period	13.9	25.5
Cash and Cash Equivalents, End of the Period	19.5	20.1
Supplemental Cash Flow Information:
Interest paid, net of capitalized interest	6.5	4.2
Income tax paid (refund)	0.4	(0.1)
Non-cash Information:
Capital expenditures included in accounts payable, accruals and other liabilities	$ 2.4	$ 2.1