Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities:
Net income	$ 31.0	$ 36.1
Reconciling adjustments:
Depreciation and amortization	49.7	47.6
Deferred income taxes	11.0	7.4
Share-based compensation expense	4.9	6.2
Equity in income of related party Terminal Joint Venture	(11.8)	(5.6)
Cash distribution received from Terminal Joint Venture	7.0
Other	1.1	1.1
Changes in assets and liabilities:
Accounts receivable, net	(9.0)	7.2
Deferred dry-docking payments	(33.0)	(28.5)
Deferred dry-docking amortization	25.6	17.2
Prepaid expenses and other assets	(1.1)	8.0
Accounts payable, accruals and other liabilities	(9.4)	(22.4)
Other long-term liabilities	(2.6)	4.5
Net cash provided by operating activities	63.4	78.8
Cash Flows From Investing Activities:
Vessel construction expenditures	(46.2)	(12.9)
Other capital expenditures	(37.1)	(52.9)
Proceeds from (payments for) disposal of property and equipment	(0.3)	1.7
Cash deposits into Capital Construction Fund	(12.2)	(12.5)
Cash withdrawals from Capital Construction Fund	43.4	12.5
Net cash used in investing activities	(52.4)	(64.1)
Cash Flows From Financing Activities:
Repayments of debt and capital leases	(15.0)	(11.1)
Proceeds from revolving credit facility	155.0	159.0
Repayments of revolving credit facility	(125.0)	(115.0)
Proceeds from issuance of common stock	0.4	0.4
Dividends paid	(16.5)	(15.8)
Repurchase of Matson common stock	(1.3)	(32.3)
Tax withholding related to net share settlements of restricted stock units	(7.2)	(6.3)
Other		0.1
Net cash used in financing activities	(9.6)	(21.0)
Net Increase (Decrease) in Cash and Cash Equivalents	1.4	(6.3)
Cash and Cash Equivalents, Beginning of the Period	13.9	25.5
Cash and Cash Equivalents, End of the Period	15.3	19.2
Supplemental Cash Flow Information:
Interest paid, net of capitalized interest	12.8	11.6
Income tax paid (refund)	(0.3)	5.4
Non-cash Information:
Capital expenditures included in accounts payable, accruals and other liabilities	1.1	4.9
Accrued dividend	$ 8.7	$ 8.2