Compensation Expense Related to Stock Options, Stock Appreciation Rights and Restricted Stock Units (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options		$ 24	$ 23	$ 43	$ 46
RSUs	[1]	100	77	173	148
Total equity-based compensation expense	[2]	124	100	216	194
Equity-based compensation expense capitalized during the period		$ 22	$ 18	$ 38	$ 37

[1] Excludes 21CF RSUs converted to Company RSUs in connection with the acquisition of 21CF (see Note 4). The Company recognized $259 million of equity based compensation in connection with the 21CF acquisition.

[2] Equity-based compensation expense is net of capitalized equity-based compensation and excludes amortization of previously capitalized equity-based compensation costs.