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Fair Value Measurements (Details) (Recurring [Member], USD $)
In Millions, unless otherwise specified
Nov. 30, 2014
Assets [Abstract]  
Money market and commercial paper $ 9,782us-gaap_CashAndCashEquivalentsFairValueDisclosure
Level 1 [Member]  
Assets [Abstract]  
Money market and commercial paper 9,782us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Level 2 [Member]  
Assets [Abstract]  
Money market and commercial paper 0us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Level 3 [Member]  
Assets [Abstract]  
Money market and commercial paper $ 0us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember