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Significant Transactions (Schedule of Purchase Price Allocation After Merger) (Details) (SoftBank Merger [Member], USD $)
In Millions, unless otherwise specified
0 Months Ended
Jul. 10, 2013
Oct. 22, 2012
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets $ 8,576us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, investments 133s_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedinvestments  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 14,558us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment  
Finite-Lived Intangibles 50,672us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 244us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt (10,623)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent (29,481)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other (14,256)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent  
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net (3,989)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther  
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net 22,177s_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedNetpriortotheBondConversion  
Convertible Debt   3,100us-gaap_ConvertibleDebt
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, after Conversion of the Bond 25,277s_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedNetafterConversionoftheBond  
Successor [Member]    
Business Acquisition [Line Items]    
Goodwill $ 6,343us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= s_SoftBankMergerMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember