Equity-Based Compensation Compensation Expense Related to Restricted Stock Units of 21CF (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock or Unit Expense	[1]	$ 114	$ 92	$ 527	$ 240
21CF
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock or Unit Expense		$ 39		$ 279

[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.