v3.5.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Sep. 25, 2015
Carrying (Reported) Amount, Fair Value Disclosure [Member]    
Debt Instrument [Line Items]    
Long-term debt $ 5,321 $ 5,361
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Debt Instrument [Line Items]    
Long-term debt, fair value $ 4,865 $ 5,044