Significant Components of the Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Sep. 26, 2015	Sep. 27, 2014
Deferred tax assets:
Accrued liabilities and other reserves	$ 4,205	$ 3,326
Basis of capital assets and investments	2,238	898
Deferred revenue	1,941	1,787
Deferred cost sharing	667	0
Share-based compensation	575	454
Unrealized losses	564	130
Other	721	227
Total deferred tax assets, net of valuation allowance of $0	10,911	6,822
Deferred tax liabilities:
Unremitted earnings of foreign subsidiaries	26,868	21,544
Other	303	398
Total deferred tax liabilities	27,171	21,942
Net deferred tax liabilities	$ (16,260)	$ (15,120)