Unaudited Quarterly Consolidated Financial Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 27, 2013	Jul. 28, 2013	Apr. 28, 2013	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 27, 2013	Oct. 28, 2012	Oct. 30, 2011
Unaudited Quarterly Consolidated Financial Data
Net sales	$ 1,988	$ 1,975	$ 1,973	$ 1,573	$ 1,646	$ 2,343	$ 2,541	$ 2,189	$ 7,509	$ 8,719	$ 10,517
Gross margin	795	806	808	582	586	930	1,011	786	2,991	3,313	4,360
Net income (loss)	$ 183	$ 168	$ (129)	$ 34	$ (515)	$ 218	$ 289	$ 117	$ 256	$ 109	$ 1,926
Diluted earnings (loss) per share (in dollars per share)	$ 0.15	$ 0.14	$ (0.11)	$ 0.03	$ (0.42)	$ 0.17	$ 0.22	$ 0.09	$ 0.21	$ 0.09	$ 1.45