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Revenues - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Oct. 03, 2020
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 400	$ 500
Revenue, Remaining Performance Obligation, Amount	16,000
Contract with Customer, Asset, Allowance for Credit Loss	(319)		$ (460)
Contract with Customer, Liability, Revenue Recognized	1,500	$ 2,100
Syndicated programming
Long-term receivables, net of allowance for credit losses	1,000
Mortgage Receivable
Long-term receivables, net of allowance for credit losses	700
Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount	5,000
Unsatisfied performance obligation recognized in fiscal 2022
Revenue, Remaining Performance Obligation, Amount	5,000
Unsatisfied performance obligation recognized in fiscal 2023
Revenue, Remaining Performance Obligation, Amount	3,000
Unsatisfied performance obligation recognized thereafter
Revenue, Remaining Performance Obligation, Amount	$ 3,000