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Pensions And Other Postretirement Benefits (Narrative) (Details)
$ in Millions
 12 Months Ended
Oct. 01, 2016
USD ($)
plan
Oct. 03, 2015
USD ($)
plan
Sep. 27, 2014
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Number of Plans | plan 9    
Defined contribution retirement programs, expenses recognized $ 67 $ 62 $ 53
Number of defined benefit plans with accumulated benefit obligations in excess of plan assets | plan 8 8  
Healthcare cost trend rate, assumed, retirees who do qualify for Medicare 9.00%    
Healthcare cost trend rate, assumed, retirees who do not yet qualify for Medicare 7.60%    
Healthcare cost trend rate, ultimate rate 4.50%    
Defined Benefit Pension, Fair Value of Plan Assets $ 1,440 $ 1,576  
Expected contributions to pension plans for fiscal 2017 40    
Defined benefit plans funding 64 14 9
Multiemployer Plans, Pension [Member] | Bakery and Confectionary Union & Industry International Pension Fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Multiemployer plan, contributions $ 1 1  
Multiemployer Plans, Pension [Member] | Bakery and Confectionary Union & Industry International Pension Fund [Member] | Pension and Other Postretirement Plans, Contributions, Total [Member] | Multiemployer Plans Concentration Risk [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Concentration, Percentage (less than) 5.00%    
Unfunded Non-Qualified Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Number of Unfunded Non-Qualified Plans | plan 3    
Amounts expected to be reclassified to earnings within next 12 months $ 6    
Defined Benefit Plan, Benefit Obligation 222 201 182
Defined Benefit Pension, Fair Value of Plan Assets 0 0 3
Defined benefit plans funding $ 10 8  
Funded Qualified Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Number of Funded Qualified Plans | plan 6    
Defined Benefit Plan, Number of Frozen and Noncontributory Qualified Plans | plan 5    
Number of defined benefit plans | plan 2    
Accumulated benefit obligation $ 1,554 1,785  
Amounts expected to be reclassified to earnings within next 12 months 1    
Defined Benefit Plan, Benefit Obligation 1,554 1,785 1,849
Defined Benefit Pension, Fair Value of Plan Assets 1,440 1,576 1,647
Defined benefit plans funding $ 54 6  
Assumed Pension Plan Settlement Election Rate 50.00%    
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements $ 2    
Other Postretirement Benefit Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Amounts expected to be reclassified to earnings within next 12 months (25)    
Defined Benefit Plan, Benefit Obligation 36 114 163
Defined Benefit Pension, Fair Value of Plan Assets 0 0 $ 0
Defined benefit plans funding $ 9 10  
Postretirement Health Coverage [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Number of Plans Subject to Partial Settlement, Health and Life Insurance Related | plan 5    
Defined Benefit Plans, Not Impacted by Heathcare Cost Trend Rates | plan 2    
Defined Benefit Plan, Benefit Obligation Not Impacted by Healthcare Cost Trend Due to Plan Amendments $ 2    
Defined Benefit Plan, Benefit Obligation Not Impacted by Healthcare Cost Trend 22    
Defined Benefit Plan, Benefit Obligation $ 12    
Defined Benefit Plans, Not Impacted by Heathcare Cost Trend Rates, Consisting of Fixed Annual Payments | plan 1    
Defined Benefit Plans, Not Impacted by Heathcare Cost Trend Rates, Life Insurance Related | plan 1    
Foreign Subsidiary Pension Benefit Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 1    
Defined Benefit Pension, Fair Value of Plan Assets $ 28 $ 14