Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Stock-Based Compensation
Stock-based compensation expense	$ 500,000,000	$ 635,000,000	$ 685,000,000
Income tax benefit	(158,000,000)	(197,000,000)	(219,000,000)
Stock-based compensation expense, net of tax	342,000,000	438,000,000	466,000,000
Cash received from option exercises and purchases under the ESPP	288,000,000	716,000,000	896,000,000
Benefit realized for the tax deduction from option exercises of share-based payment awards	13,000,000	57,000,000	220,000,000
Restricted Stock Awards
Shares
Outstanding at the beginning of the period (in shares)	25,532,000	16,813,000	5,848,000
Granted (in shares)	20,707,000	20,316,000	17,569,000
Vested (in shares)	(10,966,000)	(8,521,000)	(5,660,000)
Forfeited (in shares)	(3,011,000)	(3,076,000)	(944,000)
Outstanding at the end of the period (in shares)	32,262,000	25,532,000	16,813,000
Weighted-Average Grant Date Fair Value Per Share
Outstanding at the beginning of the period (in dollars per share)	$ 31	$ 39	$ 45
Granted (in dollars per share)	$ 15	$ 27	$ 38
Vested (in dollars per share)	$ 33	$ 38	$ 41
Forfeited (in dollars per share)	$ 24	$ 34	$ 43
Outstanding at the end of the period (in dollars per share)	$ 21	$ 31	$ 39
Unrecognized pre-tax stock-based compensation expense and recognition period
Unrecognized pre-tax stock-based compensation expense	330,000,000	508,000,000	526,000,000
Remaining weighted-average vesting period over which pre-tax stock-based compensation expense expected to be recognized	1 year 3 months 18 days	1 year 3 months 18 days	1 year 4 months 24 days
Weighted-average fair value and the assumptions used to measure fair value
Weighted average fair value of grants per unit (In dollars per share)	$ 15	$ 27	$ 38
Stock Options
Unrecognized pre-tax stock-based compensation expense and recognition period
Unrecognized pre-tax stock-based compensation expense	112,000,000	157,000,000	264,000,000
Remaining weighted-average vesting period over which pre-tax stock-based compensation expense expected to be recognized	2 years 2 months 12 days	1 year 9 months 18 days	2 years 3 months 18 days
Weighted-average fair value and the assumptions used to measure fair value
Weighted- average fair value of grants per option (in dollars per share)	$ 4.26	$ 9.06	$ 7.85
Expected volatility (as a percent)	42.00%	42.00%	41.00%
Risk-free interest rate (as a percent)	1.07%	1.17%	1.20%
Expected dividend yield (as a percent)	3.64%	1.83%	1.97%
Expected term in months	71 months	67 months	63 months
Total grant date fair value of options vested	64,000,000	104,000,000	95,000,000
Shares
Outstanding at the beginning of the period (in shares)	87,296,000	120,243,000	142,916,000
Granted (in shares)	25,785,000	7,529,000	18,804,000
Exercised (in shares)	(10,063,000)	(29,683,000)	(37,121,000)
Forfeited/cancelled/expired (in shares)	(18,976,000)	(10,793,000)	(4,356,000)
Outstanding at the end of the period (in shares)	84,042,000	87,296,000	120,243,000
Vested and expected to vest at the end of the period (in shares)	80,004,000	85,935,000	117,066,000
Exercisable at the end of the period (in shares)	49,825,000	68,437,000	97,967,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 29	$ 28	$ 28
Granted (in dollars per share)	$ 15	$ 27	$ 21
Exercised (in dollars per share)	$ 19	$ 20	$ 23
Forfeited/cancelled/expired (in dollars per share)	$ 25	$ 35	$ 39
Outstanding at the end of the period (in dollars per share)	$ 27	$ 29	$ 28
Vested and expected to vest at the end of the period (in dollars per share)	$ 27	$ 29	$ 28
Exercisable at the end of the period (in dollars per share)	$ 33	$ 31	$ 29
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period	3 years 10 months 24 days	3 years	3 years
Vested and expected to vest at the end of the period	3 years 8 months 12 days	2 years 10 months 24 days	2 years 10 months 24 days
Exercisable at the end of the period	1 year 9 months 18 days	1 year 10 months 24 days	2 years
Aggregate Intrinsic Value
Outstanding at the end of the period	303,000,000	15,000,000	460,000,000
Vested and expected to vest at the end of the period	274,000,000	15,000,000	442,000,000
Exercisable at the end of the period	58,000,000	12,000,000	332,000,000
Options assumed through acquisitions (in shares)			6,000,000
Weighted-average exercise price of options assumed through acquisitions (in dollars per share)			$ 14
Options exercised	36,000,000	176,000,000	673,000,000
Stock Options | Minimum
Stock-Based Compensation
Vesting period	3 years
Stock Options | Maximum
Stock-Based Compensation
Vesting period	4 years
PRUs
Stock-Based Compensation
Performance period to determine share based awards	3 years
Shares
Outstanding at the beginning of the period (in shares)	5,688,000	11,382,000	18,508,000
Granted (in shares)	0	1,251,000	5,950,000
Change in units due to performance and market conditions achievement for PRUs vested in the period (in shares)	(4,307,000)	(5,617,000)	(10,862,000)
Forfeited (in shares)	(356,000)	(1,328,000)	(2,214,000)
Outstanding at the end of the period (in shares)	1,025,000	5,688,000	11,382,000
Outstanding Target shares assigned a fair value at the end of the period	690,000	3,492,000	5,867,000
Unrecognized pre-tax stock-based compensation expense and recognition period
Unrecognized pre-tax stock-based compensation expense	$ 3,000,000	$ 17,000,000	$ 82,000,000
Remaining weighted-average vesting period over which pre-tax stock-based compensation expense expected to be recognized	1 year	1 year 1 month 6 days	1 year 4 months 24 days
PRUs | Minimum
Stock-Based Compensation
Percentage of target shares granted used in computation of issuance of unvested awards	0.00%
PRUs | Maximum
Stock-Based Compensation
Percentage of target shares granted used in computation of issuance of unvested awards	200.00%
PRU awards granted in fiscal 2012
Weighted-Average Grant Date Fair Value Per Share
Granted (in dollars per share)	$ 13.14	$ 27.00
Weighted-average fair value and the assumptions used to measure fair value
Weighted average fair value of grants per unit (In dollars per share)	$ 13.14	$ 27.00
PRU awards granted prior to fiscal 2012
Weighted-Average Grant Date Fair Value Per Share
Granted (in dollars per share)	$ 0.00	$ 3.35	$ 27.59
Weighted-average fair value and the assumptions used to measure fair value
Weighted average fair value of grants per unit (In dollars per share)	$ 0.00	$ 3.35	$ 27.59
Expected volatility (as a percent)	33.00%	41.00%	30.00%
Risk-free interest rate (as a percent)	0.18%	0.14%	0.38%
Expected dividend yield (as a percent)	3.94%	1.78%	0.75%
Expected term in months	12 months	15 months	19 months
Cash-settled awards and restricted stock awards | Minimum
Stock-Based Compensation
Vesting period	1 year
Cash-settled awards and restricted stock awards | Maximum
Stock-Based Compensation
Vesting period	3 years