Net Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Numerator:
Net (loss) earnings	$ (12,650)	$ 7,074	$ 8,761
Denominator:
Weighted-average shares used to compute basic EPS	1,974	2,094	2,319
Dilutive effect of employee stock plans (in shares)		34	53
Weighted-average shares used to compute diluted EPS	1,974	2,128	2,372
Net (loss) earnings per share:
Basic (in dollars per share)	$ (6.41)	$ 3.38	$ 3.78
Diluted (in dollars per share)	$ (6.41)	$ 3.32	$ 3.69
Stock Options
Other information related to EPS computation
Antidilutive securities excluded from the calculation of EPS (in shares)	10
Options with exercise price greater than market price of stock
Other information related to EPS computation
Antidilutive securities excluded from the calculation of EPS (in shares)	56	25	5
Stock options combined exercise price unamortized fair value excess tax benefits greater than market price
Other information related to EPS computation
Antidilutive securities excluded from the calculation of EPS (in shares)	1	1	2