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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
 12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Funded Qualified Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 8 $ 10 $ 1
Interest cost 65 78 10
Expected return on plan assets (65) (102) (13)
Amortization of prior service cost 0 0 0
Recognized actuarial (gain) loss, net 2 2 2
Recognized settlement (gain) loss (12) 8 0
Net periodic benefit (credit) cost (2) (4) 0
Unfunded Non-Qualified Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 6 8 7
Interest cost 9 8 5
Expected return on plan assets 0 0 0
Amortization of prior service cost 0 0 0
Recognized actuarial (gain) loss, net 5 4 2
Recognized settlement (gain) loss 0 0 0
Net periodic benefit (credit) cost 20 20 14
Other Postretirement Benefit Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 1 5 2
Interest cost 3 7 3
Expected return on plan assets 0 0 0
Amortization of prior service cost (20) (1) 0
Recognized actuarial (gain) loss, net (15) 9 (8)
Recognized settlement (gain) loss 0 (2) 0
Net periodic benefit (credit) cost $ (31) $ 18 $ (3)