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Revenues - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 20, 2019	Mar. 30, 2019	Dec. 29, 2018	Mar. 30, 2019
Contract with Customer, Performance Obligation Satisfied in Previous Period		$ 431		$ 476
Revenue, Remaining Performance Obligation, Amount		17,600		17,600
Contract with Customer, Liability, Revenue Recognized		700		2,300
Unsatisfied performance obligation recognized in fiscal 2019
Revenue, Remaining Performance Obligation, Amount		3,700		3,700
Unsatisfied performance obligation recognized in fiscal 2020
Revenue, Remaining Performance Obligation, Amount		5,400		5,400
Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount		3,500		3,500
Unsatisfied performance obligation recognized thereafter
Revenue, Remaining Performance Obligation, Amount		5,000		5,000
Accounting Standards Update 2014-09
Adoption of new accounting guidance			$ 116
Contract with Customer, Asset, Accumulated Allowance for Credit Loss		133		133
Customer Advances and Deposits		$ 1,000		$ 1,000
21CF
Increase (Decrease) in Deferred Revenue	$ 600