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Financing (Narrative) (Details) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
12 Months Ended |
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Jan. 31, 2015
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Feb. 02, 2013
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Apr. 28, 2012
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Jan. 31, 2015
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Feb. 01, 2014
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Feb. 02, 2013
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| Extinguishment of debt |
$ 407us-gaap_ExtinguishmentOfDebtAmount |
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| Long-term debt |
8,219us-gaap_LongTermDebt |
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8,219us-gaap_LongTermDebt |
7,171us-gaap_LongTermDebt |
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| Additional interest expense from early repurchase of debt |
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133us-gaap_GainsLossesOnExtinguishmentOfDebt |
4us-gaap_GainsLossesOnExtinguishmentOfDebt |
17us-gaap_GainsLossesOnExtinguishmentOfDebt |
0us-gaap_GainsLossesOnExtinguishmentOfDebt |
137us-gaap_GainsLossesOnExtinguishmentOfDebt |
| Amount of outstanding debt repaid at maturity |
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453m_AmountOfOutstandingDebtRepaidAtMaturity |
109m_AmountOfOutstandingDebtRepaidAtMaturity |
914m_AmountOfOutstandingDebtRepaidAtMaturity |
| Line of credit facility, maximum borrowing capacity |
1,500us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity |
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1,500us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity |
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| Line of credit facility, maximum borrowing capacity at Company's option |
1,750us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |
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1,750us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |
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| Interest coverage ratio |
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9.68m_LineOfCreditFacilityCovenantComplianceInterestCoverageRatio |
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| Leverage ratio |
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1.83m_LineOfCreditFacilityCovenantComplianceLeverageRatio |
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| Minimum specified interest coverage ratio in credit agreement |
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3.25m_LineOfCreditFacilityCovenantTermsInterestCoverageRatio |
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| Maximum specified leverage ratio in credit agreement |
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3.75m_LineOfCreditFacilityCovenantTermsLeverageRatio |
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| Amount non-recurring cash charges may not exceed in credit agreement |
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400m_MaximumSpecifiedNonRecurringCashChargesInCreditAgreement |
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| Amount of indebtedness due prior to maturity that would result in default under credit agreements |
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150m_AmountOfIndebtednessDuePriorToMaturityWhichWouldResultInDefaultUnderCreditAgreements |
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| Cross Default Provision In Credit Agreement Floor |
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100m_CrossDefaultProvisionInCreditAgreementFloor |
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| Commercial paper |
1,500m_CommercialPaperFacilityMaximumBorrowingCapacity |
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1,500m_CommercialPaperFacilityMaximumBorrowingCapacity |
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| Prepaid expenses and other current assets pledged as collateral for debt security |
37us-gaap_PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue |
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37us-gaap_PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue |
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| 5.875% Senior Notes Due 2013 [Member] |
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| Extinguishment of debt |
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0us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_FivePointEightSevenFivePercentSeniorNotesDueTwoThousandThirteenMember |
0us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_FivePointEightSevenFivePercentSeniorNotesDueTwoThousandThirteenMember |
298us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_FivePointEightSevenFivePercentSeniorNotesDueTwoThousandThirteenMember |
| Debt instrument interest rate, stated percentage |
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5.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_FivePointEightSevenFivePercentSeniorNotesDueTwoThousandThirteenMember |
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5.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_FivePointEightSevenFivePercentSeniorNotesDueTwoThousandThirteenMember |
| 8.0% Senior Debentures Due 2012 [Member] |
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| Extinguishment of debt |
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0us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
0us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
173us-gaap_ExtinguishmentOfDebtAmount / us-gaap_ShortTermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
| Debt instrument interest rate, stated percentage |
|
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
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8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
| 7.875% Senior Notes Due 2015 [Member] |
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| Debt instrument interest rate, stated percentage |
7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
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7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
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| Other Standby and Commercial Letters of Credit [Member] |
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| Debt instrument, principal outstanding |
29us-gaap_DebtInstrumentCarryingAmount / us-gaap_ShortTermDebtTypeAxis = m_OtherStandbyAndCommercialLettersOfCreditMember |
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29us-gaap_DebtInstrumentCarryingAmount / us-gaap_ShortTermDebtTypeAxis = m_OtherStandbyAndCommercialLettersOfCreditMember |
34us-gaap_DebtInstrumentCarryingAmount / us-gaap_ShortTermDebtTypeAxis = m_OtherStandbyAndCommercialLettersOfCreditMember |
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| 3.625% senior notes due 2024[Member] [Member] [Member] |
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| Proceeds from Issuance of Debt |
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500us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
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| Debt instrument interest rate, stated percentage |
3.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
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3.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
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| Debt instrument, principal outstanding |
500us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
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500us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
0us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreepointsixtwofivepercentseniornotesduetwothousandtwentyfourMemberMemberMember |
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| 7.875% Senior Notes Due 2015 [Member] |
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| Extinguishment of debt |
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407us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
0us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
205us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
| Debt instrument, principal outstanding |
0us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
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0us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
407us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_SevenPointEightSevenFivePercentSeniorNotesDueTwoThousandFifteenMember |
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| November 28, 2012 Debt Tender [Member] |
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| Extinguishment of debt |
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700us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember |
| 4.375% Senior notes due 2023 [Member] |
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| Proceeds from Issuance of Debt |
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400us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = m_A4.375Seniornotesdue2023Member |
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| Debt instrument interest rate, stated percentage |
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4.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_A4.375Seniornotesdue2023Member |
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| Debt instrument, principal outstanding |
400us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A4.375Seniornotesdue2023Member |
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400us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A4.375Seniornotesdue2023Member |
400us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A4.375Seniornotesdue2023Member |
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| 3.875% Senior notes due 2022 [Member] |
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| Debt instrument, principal outstanding |
550us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreePointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyTwoMember |
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550us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreePointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyTwoMember |
550us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_ThreePointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyTwoMember |
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| 5.125% Senior debentures due 2042 [Member] |
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| Debt instrument, principal outstanding |
250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FivePointOneTwoFivePercentSeniorDebenturesDueTwoThousandFortyTwoMember |
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250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FivePointOneTwoFivePercentSeniorDebenturesDueTwoThousandFortyTwoMember |
250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FivePointOneTwoFivePercentSeniorDebenturesDueTwoThousandFortyTwoMember |
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| 2.875% Senior notes due 2023 [Member] |
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| Proceeds from Issuance of Debt |
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750us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
| Debt instrument interest rate, stated percentage |
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2.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
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2.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
| Debt instrument, principal outstanding |
750us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
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750us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
750us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A2875SeniorNotesDue2023Member |
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| 4.3% Senior notes due 2043 [Member] |
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| Proceeds from Issuance of Debt |
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250us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
| Debt instrument interest rate, stated percentage |
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4.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
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4.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
| Debt instrument, principal outstanding |
250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
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250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
250us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_A43SeniorNotesDue2043Member |
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| 8.0% Senior Debentures Due 2012 [Member] |
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| Extinguishment of debt |
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173us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = m_EightPercentSeniorDebenturesDueTwoThousandTwelveMember |
| 4.5% senior notes due 2034[Member] |
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| Proceeds from Issuance of Debt |
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550us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
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| Debt instrument interest rate, stated percentage |
4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
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4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
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| Debt instrument, principal outstanding |
550us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
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|
550us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
0us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = m_FourpointfivepercentseniornotesduetwothousandthirtyfourMemberMemberMemberMember |
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| Minimum [Member] | November 28, 2012 Debt Tender [Member] |
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| Debt instrument interest rate, stated percentage |
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5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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|
5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
| Maximum [Member] | Financial Standby Letter of Credit [Member] |
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| Stand-by letter of credit facility amount outstanding |
1m_StandByLetterOfCreditFacilityAmountOutstanding / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_FinancialStandbyLetterOfCreditMember |
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1m_StandByLetterOfCreditFacilityAmountOutstanding / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_FinancialStandbyLetterOfCreditMember |
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| Maximum [Member] | November 28, 2012 Debt Tender [Member] |
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| Debt instrument interest rate, stated percentage |
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7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
| Carrying Amount |
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| Long-term debt |
7,236us-gaap_LongTermDebt / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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7,236us-gaap_LongTermDebt / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
6,684us-gaap_LongTermDebt / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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| Carrying Amount | November 28, 2012 Debt Tender [Member] |
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| Long-term debt |
|
$ 706us-gaap_LongTermDebt / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember |
|
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$ 706us-gaap_LongTermDebt / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = m_November282012DebtTenderMember |