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Pensions And Other Postretirement Benefits (Reconciliation Of Changes In Plans' Benefit Obligations, Assets And Funded Status) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance $ 85    
Employer contributions 9 8 8
Ending balance 1,650 85  
Funded Qualified Pension Plan [Member]
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 86 101  
Service cost 1 0 0
Interest cost 10 4 4
Plan participants' contributions 0 0  
Actuarial (gain) loss (37) (9)  
Benefits paid (11) (10)  
Business acquisition 1,800 0  
Benefit obligation at end of year 1,849 86 101
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Beginning balance 85 86  
Actual return on plan assets (36) 3  
Employer contributions 6 6  
Plan participants' contributions 0 0  
Benefits paid (11) (10)  
Business acquisition 1,603 0  
Ending balance 1,647 85 86
Funded status (202) (1)  
Unfunded Non-Qualified Pension Plan [Member]
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 85 81  
Service cost 7 5 5
Interest cost 5 3 3
Plan participants' contributions 0 0  
Actuarial (gain) loss 15 (2)  
Benefits paid (3) (2)  
Business acquisition 73 0  
Benefit obligation at end of year 182 85 81
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 3 2  
Plan participants' contributions 0 0  
Benefits paid (3) (2)  
Business acquisition 3 0  
Ending balance 3 0 0
Funded status (179) (85)  
Other Postretirement Benefits [Member]
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 71 64  
Service cost 2 2 1
Interest cost 3 2 2
Plan participants' contributions 1 1  
Actuarial (gain) loss (8) 7  
Benefits paid (6) (5)  
Business acquisition 100 0  
Benefit obligation at end of year 163 71 64
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 5 4  
Plan participants' contributions 1 1  
Benefits paid (6) (5)  
Business acquisition 0 0  
Ending balance 0 0 0
Funded status $ (163) $ (71)