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LEASES (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Leases |  |  |
Rent expense | $ 58.3 us-gaap_OperatingLeasesRentExpenseNet | $ 58.2 us-gaap_OperatingLeasesRentExpenseNet | $ 52.3 us-gaap_OperatingLeasesRentExpenseNet
Rent expenses for short-term and cancelable equipment | 27.6 us-gaap_LeaseAndRentalExpense | 20.5 us-gaap_LeaseAndRentalExpense | 17.8 us-gaap_LeaseAndRentalExpense
Future minimum payments under operating leases |  |  |
2015 | 20.8 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |  |
2016 | 13.0 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |
2017 | 9.2 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |
2018 | 3.7 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |
2019 | 2.3 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |
Thereafter | 8.1 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |  |
Total minimum lease payments | $ 57.1 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |
Minimum |  |  |
Leases |  |  |
Term of existing operating leases | 1 year |  |
Maximum |  |  |
Leases |  |  |
Term of existing operating leases | 50 years |  |
Vessels, machinery and equipment | Minimum |  |  |
Leases |  |  |
Range of life (year) | 2,015 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_VesselsMachineryAndEquipmentMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Vessels, machinery and equipment | Maximum |  |  |
Leases |  |  |
Range of life (year) | 2,022 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_VesselsMachineryAndEquipmentMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Office and warehouse | Minimum |  |  |
Leases |  |  |
Range of life (year) | 2,015 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_OfficeAndWarehouseMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Office and warehouse | Maximum |  |  |
Leases |  |  |
Range of life (year) | 2,021 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_OfficeAndWarehouseMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Terminal facilities and land | Minimum |  |  |
Leases |  |  |
Range of life (year) | 2,016 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_TerminalFacilitiesAndLandMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Terminal facilities and land | Maximum |  |  |
Leases |  |  |
Range of life (year) | 2,036 matx_YearOperatingLeaseExpires / us-gaap_PropertyPlantAndEquipmentByTypeAxis = matx_TerminalFacilitiesAndLandMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

X
- Definition Represents the term during which the lease or group of leases are set to expire. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the year upon which the minimum lease terms of the Company's non-cancelable operating leases expires + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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X
- Details
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X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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