Income Taxes - Significant Components of the Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Sep. 24, 2016	Sep. 26, 2015
Deferred tax assets:
Accrued liabilities and other reserves	$ 4,135	$ 4,205
Basis of capital assets	2,107	2,238
Deferred revenue	1,717	1,941
Deferred cost sharing	667	667
Share-based compensation	601	575
Unrealized losses	0	564
Other	788	721
Total deferred tax assets, net of valuation allowance of $0	10,015	10,911
Deferred tax liabilities:
Unremitted earnings of foreign subsidiaries	31,436	26,868
Other	485	303
Total deferred tax liabilities	31,921	27,171
Net deferred tax liabilities	(21,906)	(16,260)
Deferred tax assets, valuation allowance	$ 0	$ 0