Summary Information by Operating Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 26, 2011	Mar. 31, 2012	Mar. 26, 2011
Segment Reporting Information [Line Items]
Net sales	$ 39,186	$ 24,667	$ 85,519	$ 51,408
Operating income	15,384	7,874	32,724	15,701
Americas
Segment Reporting Information [Line Items]
Net sales	13,182	9,323	30,896	18,541
Operating income	5,606	3,755	12,867	6,654
Europe
Segment Reporting Information [Line Items]
Net sales	8,807	6,027	20,063	13,283
Operating income	3,887	2,551	8,555	5,307
Japan
Segment Reporting Information [Line Items]
Net sales	2,645	1,383	6,195	2,816
Operating income	1,527	689	3,524	1,261
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	10,153	4,743	17,850	9,730
Operating income	4,774	2,045	8,078	4,087
Retail
Segment Reporting Information [Line Items]
Net sales	4,399	3,191	10,515	7,038
Operating income	$ 1,149	$ 782	$ 3,003	$ 1,788