Revenues - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 28, 2019
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 733	$ 363	$ 771	$ 408
Revenue, Remaining Performance Obligation, Amount	17,000		17,000
Contract with Customer, Asset, Allowance for Credit Loss	535		535		$ 375
Contract with Customer, Liability, Revenue Recognized	800	$ 700	2,900	$ 2,300
Receivables - current/non-current	14,100		14,100
Accounts Receivable, Allowance for Credit Loss	500		500
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	800		800
Unsatisfied performance obligation recognized in fiscal 2020
Revenue, Remaining Performance Obligation, Amount	4,000		4,000
Unsatisfied performance obligation recognized in fiscal 2021
Revenue, Remaining Performance Obligation, Amount	5,000		5,000
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