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Pensions And Other Postretirement Benefits (Reconciliation Of Changes In Plans' Benefit Obligations, Assets And Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance $ 1,650    
Employer contributions 14 $ 9 $ 8
Ending balance 1,576 1,650  
Funded Qualified Pension Plan [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 1,849 86  
Service cost 10 1 0
Interest cost 78 10 4
Plan Amendments 0 0  
Plan participants' contributions 0 0  
Actuarial (gain) loss (50) (37)  
Benefits paid (102) (11)  
Business acquisition 0 1,800  
Benefit obligation at end of year 1,785 1,849 86
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance 1,647 85  
Actual return on plan assets 25 (36)  
Employer contributions 6 6  
Plan participants' contributions 0 0  
Benefits paid (102) (11)  
Business acquisition 0 1,603  
Other 0 0  
Ending balance 1,576 1,647 85
Funded status (209) (202)  
Unfunded Non-Qualified Pension Plan [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 182 85  
Service cost 8 7 5
Interest cost 8 5 3
Plan Amendments 0 0  
Plan participants' contributions 0 0  
Actuarial (gain) loss 11 15  
Benefits paid (8) (3)  
Business acquisition 0 73  
Benefit obligation at end of year 201 182 85
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance 3 0  
Actual return on plan assets 0 0  
Employer contributions 8 3  
Plan participants' contributions 0 0  
Benefits paid (8) (3)  
Business acquisition 0 3  
Other (3) 0  
Ending balance 0 3 0
Funded status (201) (179)  
Other Postretirement Benefit Plan [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 163 71  
Service cost 5 2 2
Interest cost 7 3 2
Plan Amendments (60) 0  
Plan participants' contributions 2 1  
Actuarial (gain) loss 9 (8)  
Benefits paid (12) (6)  
Business acquisition 0 100  
Benefit obligation at end of year 114 163 71
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance 0 0  
Actual return on plan assets 0 0  
Employer contributions 10 5  
Plan participants' contributions 2 1  
Benefits paid (12) (6)  
Business acquisition 0 0  
Other 0 0  
Ending balance 0 0 $ 0
Funded status $ (114) $ (163)