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Revenues - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Apr. 03, 2021	Mar. 28, 2020	Oct. 03, 2020
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 400	$ 700	$ 700	$ 800
Revenue, Remaining Performance Obligation, Amount	15,000		15,000
Contract with Customer, Asset, Allowance for Credit Loss	(271)		(271)		$ (460)
Contract with Customer, Liability, Revenue Recognized	600	$ 800	2,100	$ 2,900
Syndicated programming
Long-term receivables, net of allowance for credit losses	1,100		1,100
Mortgage Receivable
Long-term receivables, net of allowance for credit losses	700		700
Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount	4,000		4,000
Unsatisfied performance obligation recognized in fiscal 2022
Revenue, Remaining Performance Obligation, Amount	5,000		5,000
Unsatisfied performance obligation recognized in fiscal 2023
Revenue, Remaining Performance Obligation, Amount	3,000		3,000
Unsatisfied performance obligation recognized thereafter
Revenue, Remaining Performance Obligation, Amount	$ 3,000		$ 3,000