Borrowings (Details 2) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Long-term debt
Total	$ 16,608,000,000	$ 21,789,000,000
Fair value adjustment related to hedged debt	147,000,000	399,000,000
Less: current portion	(5,226,000,000)	(5,744,000,000)
U.S. Dollar Global Notes
Long-term debt
Total	20,684,000,000	25,031,000,000
2006 Shelf Registration Statement-$500 issued at discount to par at a price of 99.694% in February 2007 at 5.4%, due March 2017
Long-term debt
Total	499,000,000	499,000,000
Discount to par (as a percent)	99.694%	99.694%
Interest rate (as a percent)	5.40%	5.40%
Face amount of debt instrument	500,000,000	500,000,000
2006 Shelf Registration Statement-$1,500 issued at discount to par at a price of 99.921% in March 2008 at 4.5%, paid March 2013
Long-term debt
Total		1,500,000,000
Discount to par (as a percent)		99.921%
Interest rate (as a percent)		4.50%
Face amount of debt instrument		1,500,000,000
2006 Shelf Registration Statement-$750 issued at discount to par at a price of 99.932% in March 2008 at 5.5%, due March 2018
Long-term debt
Total	750,000,000	750,000,000
Discount to par (as a percent)	99.932%	99.932%
Interest rate (as a percent)	5.50%	5.50%
Face amount of debt instrument	750,000,000	750,000,000
2006 Shelf Registration Statement-$2,000 issued at discount to par at a price of 99.561% in December 2008 at 6.125%, due March 2014
Long-term debt
Total	1,999,000,000	1,998,000,000
Discount to par (as a percent)	99.561%	99.561%
Interest rate (as a percent)	6.125%	6.125%
Face amount of debt instrument	2,000,000,000	2,000,000,000
2006 Shelf Registration Statement-$1,500 issued at discount to par at a price of 99.993% in February 2009 at 4.75%, due June 2014
Long-term debt
Total	1,500,000,000	1,500,000,000
Discount to par (as a percent)	99.993%	99.993%
Interest rate (as a percent)	4.75%	4.75%
Face amount of debt instrument	1,500,000,000	1,500,000,000
2009 Shelf Registration Statement - $1,100 issued at discount to par at a price of 99.921% in September 2010 at 1.25% paid September 201 3
Long-term debt
Total		1,100,000,000
Discount to par (as a percent)		99.921%
Interest rate (as a percent)		1.25%
Face amount of debt instrument		1,100,000,000
2009 Shelf Registration Statement-$1,100 issued at discount to par at a price of 99.887% in September 2010 at 2.125% due September 2015
Long-term debt
Total	1,100,000,000	1,100,000,000
Discount to par (as a percent)	99.887%	99.887%
Interest rate (as a percent)	2.125%	2.125%
Face amount of debt instrument	1,100,000,000	1,100,000,000
2009 Shelf Registration Statement-$650 issued at discount to par at a price of 99.911% in December 2010 at 2.2% due December 2015
Long-term debt
Total	650,000,000	650,000,000
Discount to par (as a percent)	99.911%	99.911%
Interest rate (as a percent)	2.20%	2.20%
Face amount of debt instrument	650,000,000	650,000,000
2009 Shelf Registration Statement-$1,350 issued at discount to par at a price of 99.827% in December 2010 at 3.75% due December 2020
Long-term debt
Total	1,349,000,000	1,348,000,000
Discount to par (as a percent)	99.827%	99.827%
Interest rate (as a percent)	3.75%	3.75%
Face amount of debt instrument	1,350,000,000	1,350,000,000
2009 Shelf Registration Statement-$1,750 issued at par in May 2011 at three month USD LIBOR plus 0.28%, paid May 2013
Long-term debt
Total		1,750,000,000
Face amount of debt instrument		1,750,000,000
Reference interest rate		three-month USD LIBOR
Spread on reference interest rate (as a percent)		0.28%
2009 Shelf Registration Statement-$500 issued at par in May 2011 at three month USD LIBOR plus 0.4%, due May 2014
Long-term debt
Total	500,000,000	500,000,000
Face amount of debt instrument	500,000,000	500,000,000
Reference interest rate	three-month USD LIBOR	three-month USD LIBOR
Spread on reference interest rate (as a percent)	0.40%	0.40%
2009 Shelf Registration Statement-$500 issued at discount to par at a price of 99.971% in May 2011 at 1.55%, due May 2014
Long-term debt
Total	500,000,000	500,000,000
Discount to par (as a percent)	99.971%	99.971%
Interest rate (as a percent)	1.55%	1.55%
Face amount of debt instrument	500,000,000	500,000,000
2009 Shelf Registration Statement-$1,000 issued at discount to par at a price of 99.958% in May 2011 at 2.65%, due June 2016
Long-term debt
Total	1,000,000,000	1,000,000,000
Discount to par (as a percent)	99.958%	99.958%
Interest rate (as a percent)	2.65%	2.65%
Face amount of debt instrument	1,000,000,000	1,000,000,000
2009 Shelf Registration Statement-$1,250 issued at discount to par at a price of 99.799% in May 2011 at 4.3%, due June 2021
Long-term debt
Total	1,248,000,000	1,248,000,000
Discount to par (as a percent)	99.799%	99.799%
Interest rate (as a percent)	4.30%	4.30%
Face amount of debt instrument	1,250,000,000	1,250,000,000
2009 Shelf Registration Statement-$750 issued at discount to par at a price of 99.977% in September 2011 at 2.35%, due March 2015
Long-term debt
Total	750,000,000	750,000,000
Discount to par (as a percent)	99.977%	99.977%
Interest rate (as a percent)	2.35%	2.35%
Face amount of debt instrument	750,000,000	750,000,000
2009 Shelf Registration Statement-$1,300 issued at discount to par at a price of 99.784% in September 2011 at 3.0%, due September 2016
Long-term debt
Total	1,298,000,000	1,298,000,000
Discount to par (as a percent)	99.784%	99.784%
Interest rate (as a percent)	3.00%	3.00%
Face amount of debt instrument	1,300,000,000	1,300,000,000
2009 Shelf Registration Statement-$1,000 issued at discount to par at a price of 99.816% in September 2011 at 4.375%, due September 2021
Long-term debt
Total	999,000,000	998,000,000
Discount to par (as a percent)	99.816%	99.816%
Interest rate (as a percent)	4.375%	4.375%
Face amount of debt instrument	1,000,000,000	1,000,000,000
2009 Shelf Registration Statement-$1,200 issued at discount to par at a price of 99.863% in September 2011 at 6.0% due September 2041
Long-term debt
Total	1,198,000,000	1,198,000,000
Discount to par (as a percent)	99.863%	99.863%
Interest rate (as a percent)	6.00%	6.00%
Face amount of debt instrument	1,200,000,000	1,200,000,000
2009 Shelf Registration Statement-$350 issued at par in September 2011 at three month USD LIBOR plus 1.55%, due September 2014
Long-term debt
Total	350,000,000	350,000,000
Face amount of debt instrument	350,000,000	350,000,000
Reference interest rate	three-month USD LIBOR	three-month USD LIBOR
Spread on reference interest rate (as a percent)	1.55%	1.55%
2009 Shelf Registration Statement-$650 issued at discount to par at a price of 99.946% in December 2011 at 2.625%, due December 2014
Long-term debt
Total	650,000,000	650,000,000
Discount to par (as a percent)	99.946%	99.946%
Interest rate (as a percent)	2.625%	2.625%
Face amount of debt instrument	650,000,000	650,000,000
2009 Shelf Registration Statement-$850 issued at discount to par at a price of 99.790% in December 2011 at 3.3%, due December 2016
Long-term debt
Total	849,000,000	849,000,000
Discount to par (as a percent)	99.79%	99.79%
Interest rate (as a percent)	3.30%	3.30%
Face amount of debt instrument	850,000,000	850,000,000
2009 Shelf Registration Statement-$1,500 issued at discount to par at a price of 99.707% in December 2011 at 4.65%, due December 2021
Long-term debt
Total	1,496,000,000	1,496,000,000
Discount to par (as a percent)	99.707%	99.707%
Interest rate (as a percent)	4.65%	4.65%
Face amount of debt instrument	1,500,000,000	1,500,000,000
2009 Shelf Registration Statement-$1,500 issued at discount to par at a price of 99.985% in March 2012 at 2.6%, due September 2017
Long-term debt
Total	1,500,000,000	1,500,000,000
Discount to par (as a percent)	99.985%	99.985%
Interest rate (as a percent)	2.60%	2.60%
Face amount of debt instrument	1,500,000,000	1,500,000,000
2009 Shelf Registration Statement-$500 issued at discount to par at a price of 99.771% in March 2012 at 4.05%, due September 2022
Long-term debt
Total	499,000,000	499,000,000
Discount to par (as a percent)	99.771%	99.771%
Interest rate (as a percent)	4.05%	4.05%
Face amount of debt instrument	500,000,000	500,000,000
EDS Senior Notes
Long-term debt
Total	314,000,000	1,423,000,000
EDS Senior Notes-$1,100 issued June 2003 at 6.0%, paid August 2013
Long-term debt
Total		1,109,000,000
Interest rate (as a percent)		6.00%
Face amount of debt instrument		1,100,000,000
EDS Senior Notes-$300 issued October 1999 at 7.45%, due October 2029
Long-term debt
Total	314,000,000	314,000,000
Interest rate (as a percent)	7.45%	7.45%
Face amount of debt instrument	300,000,000	300,000,000
Other, including capital lease obligations, at 0.00%-8.39%, due in calendar years 2014-2024
Long-term debt
Other, including capital lease obligations	689,000,000	680,000,000
Minimum interest rate (as a percent)	0.00%	0.00%
Maximum interest rate (as a percent)	8.39%	8.39%
Other, including capital lease obligations, at 0.00%-8.39%, due in calendar years 2014-2024 | HPFS and its subsidiaries
Long-term debt
Other, including capital lease obligations	$ 244,000,000	$ 225,000,000