Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Current Assets:
Cash and cash equivalents	$ 221.9	$ 141.9
Accounts receivable, net of allowance for credit losses of $8.6 million and $8.6 million, respectively	367.4	256.8
Prepaid expenses and other assets	97.4	73.2
Total current assets	686.7	471.9
Long-term Assets:
Investment in SSAT	113.7	96.2
Property and equipment, net	2,733.6	2,499.4
Operating lease right-of-use assets	364.4	369.6
Goodwill	327.8	327.8
Intangible assets, net	137.2	146.6
Capital Construction Fund	298.6	532.7
Deferred dry-docking costs, net	115.1	94.7
Other long-term assets	94.9	96.7
Total long-term assets	4,185.3	4,163.7
Total Assets	4,872.0	4,635.6
Current Liabilities:
Current portion of debt	39.7	39.7
Accounts payable and accruals	310.1	244.9
Operating lease liabilities	128.1	128.5
Other liabilities	146.0	114.3
Total current liabilities	623.9	527.4
Long-term Liabilities:
Long-term debt, net of deferred loan fees	282.9	312.1
Long-term operating lease liabilities	248.1	246.8
Deferred income taxes, net	702.3	701.9
Other long-term liabilities	86.5	88.4
Total long-term liabilities	1,319.8	1,349.2
Commitments and Contingencies (see Note 16)
Shareholders' Equity:
Common stock	22.2	22.8
Additional paid in capital	286.0	295.2
Accumulated other comprehensive income (loss), net	(2.2)	1.6
Retained earnings	2,622.3	2,439.4
Total shareholders' equity	2,928.3	2,759.0
Total Liabilities and Shareholders' Equity	$ 4,872.0	$ 4,635.6

The carrying value of cash and cash equivalents and investments in capital construction fund.

No definition available.

Name:	matx_CapitalConstructionFundCashAndCashEquivalentsAndInvestments
Namespace Prefix:	matx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.