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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. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 2 $ 2 $ 2
Interest cost 1 1 1
Expected return on plan assets 0 0 0
Amortization of prior service cost (2) (6) (2)
Recognized actuarial loss (gain), net 0 4 5
Recognized settlement loss (gain) (34) 0 0
Net periodic benefit (credit) cost (33) 1 6
Defined Benefit Plan, Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0 0 0
Interest cost 0 14 56
Expected return on plan assets 0 (17) (57)
Amortization of prior service cost 0 0 0
Recognized actuarial loss (gain), net 0 0 (1)
Recognized settlement loss (gain) 0 (112) 19
Net periodic benefit (credit) cost 0 (115) 17
Defined Benefit Plan, Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0 0 1
Interest cost 6 8 9
Expected return on plan assets 0 0 0
Amortization of prior service cost 1 1 1
Recognized actuarial loss (gain), net 4 3 2
Recognized settlement loss (gain) 0 0 0
Net periodic benefit (credit) cost $ 11 $ 12 $ 13