Restructuring and Impairment Charges - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
		Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges		$ 1,183	$ 33	$ 98
Restricted Stock or Unit Expense	[1]	627	$ 306	$ 274
TFCF
Restructuring Cost and Reserve [Line Items]
Restricted Stock or Unit Expense		307
TFCF | TFCF Integration
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges		1,200
TFCF | TFCF Integration | Scenario, Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges		1,500
TFCF | TFCF Integration | Vest Upon Acquisition
Restructuring Cost and Reserve [Line Items]
Restricted Stock or Unit Expense		300
TFCF | TFCF Integration | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges		$ 900

[1] Includes TFCF Performance RSUs converted to Company RSUs in connection with the TFCF acquisition (see Note 4). In fiscal 2019, the Company recognized $307 million of equity based compensation in connection with the TFCF acquisition.