Restructuring and Impairment Charges - Additional Details (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 207	$ 0	$ 869	$ 28
Restricted Stock or Unit Expense	[1]	114	$ 92	527	$ 240
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				20
21CF
Restructuring Cost and Reserve [Line Items]
Restricted Stock or Unit Expense		39		279
21CF Integration
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		205		608
21CF Integration | 21CF | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 608
21CF Integration | Scenario, Plan | 21CF
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1,500
21CF Integration | Vest Upon Acquisition | 21CF
Restructuring Cost and Reserve [Line Items]
Restricted Stock or Unit Expense		$ 261

[1] Includes 21CF RSUs converted to Company RSUs in connection with the acquisition of 21CF (see Note 4). For the quarter and nine months ended, the Company recognized $39 million and $279 million, respectively, of equity based compensation in connection with the 21CF acquisition.