Revenues - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Sep. 28, 2019
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 425	$ 551	$ 1,096	$ 773
Revenue, Remaining Performance Obligation, Amount	16,000		16,000
Contract with Customer, Asset, Allowance for Credit Loss	574		574		$ 375
Contract with Customer, Liability, Revenue Recognized	300	$ 300	3,100	$ 2,500
Syndicated programming
Long-term receivables, net of allowance for credit losses	900		900
Mortgage Receivable
Long-term receivables, net of allowance for credit losses	800		800
Unsatisfied performance obligation recognized in fiscal 2020
Revenue, Remaining Performance Obligation, Amount	2,000		2,000
Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount	6,000		6,000
Unsatisfied performance obligation recognized in fiscal 2022
Revenue, Remaining Performance Obligation, Amount	4,000		4,000
Unsatisfied performance obligation recognized thereafter
Revenue, Remaining Performance Obligation, Amount	$ 4,000		$ 4,000