Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities:
Net income	$ 719.9	$ 249.7
Reconciling adjustments:
Depreciation and amortization	71.1	67.9
Amortization of operating lease right of use assets	75.3	49.2
Deferred income taxes	9.4	15.2
Share-based compensation expense	10.5	9.5
Income from SSAT	(58.7)	(22.0)
Distribution from SSAT	26.3	21.0
Other	(0.7)	(1.0)
Changes in assets and liabilities:
Accounts receivable, net	(37.6)	(60.2)
Deferred dry-docking payments	(14.7)	(17.4)
Deferred dry-docking amortization	12.9	12.6
Prepaid expenses and other assets	(48.3)	(38.7)
Accounts payable, accruals and other liabilities	4.5	3.7
Operating lease liabilities	(74.2)	(47.1)
Other long-term liabilities	(4.6)	(3.6)
Net cash provided by operating activities	691.1	238.8
Cash Flows From Investing Activities:
Capitalized vessel construction expenditures	(11.4)
Other capital expenditures	(68.4)	(101.3)
Proceeds from disposal of property and equipment	0.8	1.7
Cash deposits into Capital Construction Fund	(10.7)	(31.2)
Withdrawals from Capital Construction Fund	10.7	31.2
Net cash used in investing activities	(79.0)	(99.6)
Cash Flows From Financing Activities:
Repayments of debt	(32.5)	(26.8)
Proceeds from revolving credit facility		241.9
Repayments of revolving credit facility		(313.7)
Payment of financing costs		(3.0)
Dividends paid	(25.0)	(20.2)
Repurchase of Matson common stock	(208.5)
Tax withholding related to net share settlements of restricted stock units	(19.5)	(14.4)
Net cash used in financing activities	(285.5)	(136.2)
Net Increase in Cash, Cash Equivalents and Restricted Cash	326.6	3.0
Cash, Cash Equivalents and Restricted Cash, Beginning of the Period	287.7	19.7
Cash, Cash Equivalents and Restricted Cash, End of the Period	614.3	22.7
Reconciliation of Cash, Cash Equivalents and Restricted Cash, End of the Period:
Cash and Cash Equivalents	609.0	17.4
Restricted Cash	5.3	5.3
Total Cash, Cash Equivalents and Restricted Cash, End of the Period	614.3	22.7
Supplemental Cash Flow Information:
Interest paid, net of capitalized interest	8.4	10.4
Income tax payments, net of refunds	211.7	75.2
Non-cash Information:
Capital expenditures included in accounts payable, accruals and other liabilities	6.1	7.7
Accrued dividends	$ 12.4	$ 13.2