XML 32 R76.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-Term Debt (Detail) (USD $)
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Debt Instrument [Line Items]        
$2,000 Credit Facility $ 0us-gaap_LineOfCredit   $ 0us-gaap_LineOfCredit  
Other 123,000,000mar_LongtermDebtandCapitalLeaseObligationsOther   180,000,000mar_LongtermDebtandCapitalLeaseObligationsOther  
Long-term debt 3,781,000,000us-gaap_DebtAndCapitalLeaseObligations   3,199,000,000us-gaap_DebtAndCapitalLeaseObligations  
Accrued expenses and other (liabilities held for sale) 0us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities (46,000,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities (46,000,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities  
Less current portion (324,000,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent   (6,000,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent  
Long-term debt, noncurrent 3,457,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations   3,147,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations  
Multicurrency revolving credit agreement, aggregate effective borrowings 2,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity      
Commercial Paper        
Debt Instrument [Line Items]        
Commercial paper, average interest rate of 0.4% at December 31, 2014 1,072,000,000us-gaap_CommercialPaperNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CommercialPaperMember
  834,000,000us-gaap_CommercialPaperNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CommercialPaperMember
 
Senior notes, weighted average interest rate 0.40%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CommercialPaperMember
     
Series G, Senior Notes 5.8% Due November 10, 2015        
Debt Instrument [Line Items]        
Senior Notes 314,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesGSeniorNotesMember
[1]   312,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesGSeniorNotesMember
[1]  
Debt instrument, stated interest rate 5.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesGSeniorNotesMember
     
Senior Notes, face amount 316,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesGSeniorNotesMember
     
Senior notes, effective interest rate 6.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesGSeniorNotesMember
     
Series H, Senior Notes 6.2% Due June 15, 2016        
Debt Instrument [Line Items]        
Senior Notes 289,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesHSeniorNotesMember
[1]   289,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesHSeniorNotesMember
[1]  
Debt instrument, stated interest rate 6.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesHSeniorNotesMember
     
Senior Notes, face amount 289,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesHSeniorNotesMember
     
Senior notes, effective interest rate 6.30%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesHSeniorNotesMember
     
Series I, Senior Notes 6.4% Due June 15, 2017        
Debt Instrument [Line Items]        
Senior Notes 293,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesISeniorNotesMember
[1]   292,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesISeniorNotesMember
[1]  
Debt instrument, stated interest rate 6.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesISeniorNotesMember
     
Senior Notes, face amount 293,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesISeniorNotesMember
     
Senior notes, effective interest rate 6.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesISeniorNotesMember
     
Series K, Senior Notes 3.0% Due March 1, 2019        
Debt Instrument [Line Items]        
Senior Notes 596,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesKSeniorNotesMember
[1]   595,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesKSeniorNotesMember
[1]  
Debt instrument, stated interest rate 3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesKSeniorNotesMember
     
Senior Notes, face amount 600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesKSeniorNotesMember
     
Senior notes, effective interest rate 4.40%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesKSeniorNotesMember
     
Series L, Senior Notes 3.3% Due September 15, 2022        
Debt Instrument [Line Items]        
Senior Notes 349,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesLSeniorNotesMember
[1]   349,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesLSeniorNotesMember
[1]  
Debt instrument, stated interest rate 3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesLSeniorNotesMember
     
Senior Notes, face amount 350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesLSeniorNotesMember
     
Senior notes, effective interest rate 3.40%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesLSeniorNotesMember
     
Series M Senior Notes 3.4% Due October 15, 2020        
Debt Instrument [Line Items]        
Senior Notes 348,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
[1]   348,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
[1]  
Debt instrument, stated interest rate 3.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
    3.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
Senior Notes, face amount 350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
    350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
Senior notes, effective interest rate 3.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesMSeniorNotesMember
     
Series N Senior Notes 3.1% Due October 15, 2021        
Debt Instrument [Line Items]        
Senior Notes 397,000,000us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesNSeniorNotesMember
[1]   0us-gaap_SeniorNotes
/ us-gaap_DebtInstrumentAxis
= mar_SeriesNSeniorNotesMember
[1]  
Debt instrument, stated interest rate 3.10%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesNSeniorNotesMember
     
Senior Notes, face amount $ 400,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mar_SeriesNSeniorNotesMember
     
Senior notes, effective interest rate 3.40%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= mar_SeriesNSeniorNotesMember
     
[1] Face amount and effective interest rate are as of year-end 2014.