Accrued Expenses (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Sep. 24, 2011	Mar. 26, 2011	Dec. 25, 2010	Sep. 25, 2010
Schedule of Accrued Liabilities [Line Items]
Deferred margin on component sales	$ 1,746		$ 2,038
Accrued warranty and related costs	1,678	1,676	1,240	1,103	904	761
Accrued taxes	1,299		1,140
Accrued marketing and selling expenses	561		598
Accrued compensation and employee benefits	551		590
Other current liabilities	3,943		3,641
Total accrued expenses	$ 9,778		$ 9,247