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Revenues Revenues - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Mar. 20, 2019	Dec. 29, 2018	Sep. 28, 2019
Contract with Customer, Performance Obligation Satisfied in Previous Period			$ 1,200
Revenue, Remaining Performance Obligation, Amount			16,000
Contract with Customer, Liability, Revenue Recognized			2,700
TFCF
Increase (Decrease) in Deferred Revenue	$ 600
Contract with Customer, Liability, Revenue Recognized			400
Scenario, Unsatisfied performance obligation recognized in fiscal 2020
Revenue, Remaining Performance Obligation, Amount			7,000
Scenario, Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount			4,000
Scenario, Unsatisfied performance obligation recognized in fiscal 2022
Revenue, Remaining Performance Obligation, Amount			3,000
Scenario, Unsatisfied performance obligation recognized thereafter
Revenue, Remaining Performance Obligation, Amount			2,000
Accounting Standards Update 2014-09
Adoption of new accounting guidance		$ 116
Contract with Customer, Asset, Accumulated Allowance for Credit Loss			200
Customer Advances and Deposits			$ 1,000