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Description of Operations (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 6 Months Ended
Jul. 09, 2013
Jul. 10, 2013
Oct. 22, 2012
Clearwire Acquisition [Member]      
Nature of Operations [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired $ 3,500us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= s_ClearwireAcquisitionMember		    
SoftBank Merger [Member]      
Nature of Operations [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired   14,100us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= s_SoftBankMergerMember		  
Convertible Debt     $ 3,100us-gaap_ConvertibleDebt
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= s_SoftBankMergerMember
Clearwire [Member] | Clearwire Acquisition [Member]      
Nature of Operations [Line Items]      
Business acquisition, share price $ 5.00us-gaap_BusinessAcquisitionSharePrice
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= s_ClearwireAcquisitionMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= s_ClearwireMember