Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows From Operating Activities:
Net income	$ 348.4	$ 234.7
Reconciling adjustments:
Depreciation and amortization	114.7	108.1
Amortization of operating lease right of use assets	102.1	108.2
Deferred income taxes	16.2	(9.3)
Share-based compensation expense	19.1	17.6
(Income) loss from SSAT	(8.5)	1.9
Distributions from SSAT	14.0
Other	(9.1)	(1.7)
Changes in assets and liabilities:
Accounts receivable, net	(31.7)	(37.1)
Deferred dry-docking payments	(20.2)	(17.3)
Deferred dry-docking amortization	21.0	18.6
Prepaid expenses and other assets	116.9	65.8
Accounts payable, accruals and other liabilities	27.6	34.4
Operating lease liabilities	(104.0)	(109.9)
Other long-term liabilities	(13.4)	(14.9)
Net cash provided by operating activities	593.1	399.1
Cash Flows From Investing Activities:
Capitalized vessel construction expenditures	(39.8)	(52.1)
Capital expenditures (excluding vessel construction expenditures)	(144.9)	(135.4)
Proceeds from disposal of property and equipment, net	4.4	0.1
Payments for asset acquisitions	(0.7)	(12.4)
Cash and interest deposited into the Capital Construction Fund	(63.6)	(120.8)
Withdrawals from Capital Construction Fund	35.8	49.9
Net cash used in investing activities	(208.8)	(270.7)
Cash Flows From Financing Activities:
Repayments of debt	(30.0)	(67.2)
Dividends paid	(33.5)	(33.8)
Repurchase of Matson common stock	(167.4)	(108.2)
Tax withholding related to net share settlements of restricted stock units	(17.0)	(12.5)
Net cash used in financing activities	(247.9)	(221.7)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	136.4	(93.3)
Cash and Cash Equivalents, and Restricted Cash, Beginning of the Period	136.3	253.7
Cash and Cash Equivalents, and Restricted Cash, End of the Period	272.7	160.4
Reconciliation of Cash, Cash Equivalents and Restricted Cash, End of the Period:
Cash and Cash Equivalents	270.3	156.5
Restricted Cash	2.4	3.9
Total Cash and Cash Equivalents, and Restricted Cash, End of the Period	272.7	160.4
Supplemental Cash Flow Information:
Interest paid, net of capitalized interest	5.3	9.6
Income tax payments (refunds), net	(85.1)	(5.3)
Non-cash Information:
Capital expenditures included in accounts payable, accruals and other liabilities	$ 26.9	7.8
Non-cash payments for asset acquisitions		$ 4.1