XML 48 R38.htm IDEA: XBRL DOCUMENT v3.24.1.u1

GENERAL AND SIGNIFICANT ACCOUNTING POLICIES- PROPERTY AND EQUIPMENT AND OTHER (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Vessels
Capitalized Interest
Interest Costs Capitalized	$ 0.8	$ 0.4

X

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483013/835-20-50-1

+ Details

Name:	us-gaap_InterestCostsCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InterestCostsIncurredCapitalizedAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=matx_VesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: