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Pensions And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost For Pension And Postretirement Benefit Plans Recognized In The Consolidated Statements Of Income) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Funded Qualified Pension Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 1 $ 0 $ 0
Interest cost 10 4 4
Expected return on plan assets (13) (5) (6)
Amortization of prior service cost 0 0 0
Recognized actuarial loss, net 2 4 3
Net periodic benefit cost 0 3 1
Unfunded Non-Qualified Pension Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 7 5 5
Interest cost 5 3 3
Expected return on plan assets 0 0 0
Amortization of prior service cost 0 1 1
Recognized actuarial loss, net 2 3 1
Net periodic benefit cost 14 12 10
Other Postretirement Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 2 2 1
Interest cost 3 2 2
Expected return on plan assets 0 0 0
Amortization of prior service cost 0 (1) (1)
Recognized actuarial loss, net (8) 7 24
Net periodic benefit cost $ (3) $ 10 $ 26