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DEBT (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2003 | Aug. 31, 2004
--- | --- | --- | --- | --- | ---
Debt |  |  |  |  |
Capital leases | $ 1.3 us-gaap_CapitalLeaseObligations | $ 2.4 us-gaap_CapitalLeaseObligations |  |  |
Total debt | 373.6 us-gaap_LongTermDebt | 286.1 us-gaap_LongTermDebt | 319.1 us-gaap_LongTermDebt |  |
Less current portion | (21.6)us-gaap_LongTermDebtCurrent | (12.5)us-gaap_LongTermDebtCurrent | (16.4)us-gaap_LongTermDebtCurrent |  |
Total long-term debt | 352.0 us-gaap_LongTermDebtAndCapitalLeaseObligations | 273.6 us-gaap_LongTermDebtAndCapitalLeaseObligations | 302.7 us-gaap_LongTermDebtAndCapitalLeaseObligations |  |
Current borrowing capacity | 6.0 us-gaap_LineOfCreditFacilityAmountOutstanding |  |  |  |
Debt maturities |  |  |  |  |
2015 | 21.6 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths |  |  |  |
2016 | 20.7 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo |  |  |  |
2017 | 28.2 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree |  |  |  |
2018 | 28.2 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour |  |  |  |
2019 | 28.2 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive |  |  |  |
Thereafter | 246.7 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive |  |  |  |
Term Loans Payable5.79 Percent Through2020 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 38.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable5.79PercentThrough2020Member | 45.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable5.79PercentThrough2020Member | 52.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable5.79PercentThrough2020Member |  |
Interest rate (as a percent) | 5.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable5.79PercentThrough2020Member | 5.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable5.79PercentThrough2020Member |  |  |
Term Loans Payable3.66 Percent Through2023 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 77.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable3.66PercentThrough2023Member | 77.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable3.66PercentThrough2023Member | 77.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable3.66PercentThrough2023Member |  |
Interest rate (as a percent) | 3.66%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable3.66PercentThrough2023Member | 3.66%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable3.66PercentThrough2023Member |  |  |
Term Loans Payable4.16 Percent Through2027 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 55.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.16PercentThrough2027Member | 55.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.16PercentThrough2027Member | 55.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.16PercentThrough2027Member |  |
Interest rate (as a percent) | 4.16%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.16PercentThrough2027Member | 4.16%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.16PercentThrough2027Member |  |  |
Term Loans Payable4.31 Percent Through2032 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 37.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.31PercentThrough2032Member | 37.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.31PercentThrough2032Member | 37.5 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.31PercentThrough2032Member |  |
Interest rate (as a percent) | 4.31%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.31PercentThrough2032Member | 4.31%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.31PercentThrough2032Member |  |  |
Term Loans Payable4.35 Percent Through2044 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 100.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.35PercentThrough2044Member |  |  |  |
Interest rate (as a percent) | 4.35%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_TermLoansPayable4.35PercentThrough2044Member |  |  |  |
Secured Bonds Payable5.34 Percent Through2028 |  |  |  |  |
Debt |  |  |  |  |
Total debt | 30.8 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member | 33.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member | 35.2 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member |  |
Interest rate (as a percent) | 5.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member | 5.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member |  | 5.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.34PercentThrough2028Member |
Secured Bonds Payable5.27 Percent Through2029 |  |  |  |  |
Debt |  |  |  |  |
Total debt | $ 33.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member | $ 35.2 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member | $ 37.4 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member |  |
Interest rate (as a percent) | 5.27%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member | 5.27%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member |  |  | 5.27%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = matx_SecuredBondsPayable5.27PercentThrough2029Member

X
- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H + Details
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- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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