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Financing Activities (Detail Of Debt Repayments) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
May 02, 2015
May 03, 2014
Debt repaid $ 3us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations $ 5us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations
9.5% Amortizing Debentures due Two Thousand Twenty One [Member]    
Extinguishment of debt 2us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_NinePointFivePercentAmortizingDebenturesDueTwoThousandTwentyOneMember		 2us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_NinePointFivePercentAmortizingDebenturesDueTwoThousandTwentyOneMember
9.75% Amortizing Debentures Due Two Thousand Twenty One [Member]    
Extinguishment of debt 1us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_NinePointSevenFivePercentAmortizingDebenturesDueTwoThousandTwentyOneMember		 1us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_NinePointSevenFivePercentAmortizingDebenturesDueTwoThousandTwentyOneMember
Capital Lease and Other Long-Term Obligations [Member]    
Extinguishment of debt $ 0us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_CapitalLeaseAndOtherLongTermObligationsMember		 $ 2us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_ShortTermDebtTypeAxis
= m_CapitalLeaseAndOtherLongTermObligationsMember