Compensation Expense Related to Stock Options, Stock Appreciation Rights and Restricted Stock Units (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options		$ 23	$ 20
RSUs		71	77
Total equity-based compensation expense	[1]	94	97
Equity-based compensation expense capitalized during the period		$ 19	$ 21

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