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Other Income And Charges (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Other income/expense      
Components of Other Income and Expenses [Line Items]      
Net Periodic Benefit Cost (Credit), Excluding Service Cost   $ 19  
Equity Earnings in Joint Ventures   $ 11 $ 9
Accounting Standards Update 2017-07 [Member] | Restatement Adjustment [Member] | Other income/expense      
Components of Other Income and Expenses [Line Items]      
Net Periodic Benefit Cost (Credit), Excluding Service Cost $ (4)   $ (9)
One time cash bonus [Member] | Cost of Sales      
Components of Other Income and Expenses [Line Items]      
Other Nonrecurring Expense $ 109