Borrowings (Details 2) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended
	May 31, 2011	Oct. 31, 2014	Oct. 31, 2013	Sep. 30, 2011	Jan. 31, 2014	Feb. 28, 2007	Mar. 31, 2008	Dec. 31, 2008	Feb. 28, 2009	Sep. 30, 2010	Dec. 31, 2010	Dec. 31, 2011	Mar. 31, 2012	Oct. 31, 1999
Long-term debt
Total		$ 16,039,000,000	$ 16,608,000,000
Fair value adjustment related to hedged debt		120,000,000	147,000,000
Less: current portion		(2,655,000,000)	(5,226,000,000)
U.S. Dollar Global Notes
Long-term debt
Total		17,837,000,000	20,684,000,000
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		500,000,000	499,000,000
Discount to par (as a percent)		99.694%	99.694%			99.694%
Interest rate (as a percent)		5.40%	5.40%			5.40%
Face amount of debt instrument		500,000,000	500,000,000			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%				99.932%
Interest rate (as a percent)		5.50%	5.50%				5.50%
Face amount of debt instrument		750,000,000	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%, paid March 2014
Long-term debt
Total			1,999,000,000
Discount to par (as a percent)		99.561%	99.561%					99.561%
Interest rate (as a percent)		6.125%	6.125%					6.125%
Face amount of debt instrument		2,000,000,000	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%, paid June 2014
Long-term debt
Total			1,500,000,000
Discount to par (as a percent)		99.993%	99.993%						99.993%
Interest rate (as a percent)		4.75%	4.75%						4.75%
Face amount of debt instrument		1,500,000,000	1,500,000,000						1,500,000,000
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%							99.887%
Interest rate (as a percent)		2.125%	2.125%							2.125%
Face amount of debt instrument		1,100,000,000	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%								99.911%
Interest rate (as a percent)		2.20%	2.20%								2.20%
Face amount of debt instrument		650,000,000	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	1,349,000,000
Discount to par (as a percent)		99.827%	99.827%								99.827%
Interest rate (as a percent)		3.75%	3.75%								3.75%
Face amount of debt instrument		1,350,000,000	1,350,000,000								1,350,000,000
2009 Shelf Registration Statement-$500 issued at par in May 2011 at three month USD LIBOR plus 0.4%, paid May 2014
Long-term debt
Total			500,000,000
Face amount of debt instrument	500,000,000	500,000,000	500,000,000
Spread on reference interest rate (as a percent)	0.40%	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%, paid May 2014
Long-term debt
Total			500,000,000
Discount to par (as a percent)	99.971%	99.971%	99.971%
Interest rate (as a percent)	1.55%	1.55%	1.55%
Face amount of debt instrument	500,000,000	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%	99.958%
Interest rate (as a percent)	2.65%	2.65%	2.65%
Face amount of debt instrument	1,000,000,000	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%	99.799%
Interest rate (as a percent)	4.30%	4.30%	4.30%
Face amount of debt instrument	1,250,000,000	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%	99.977%
Interest rate (as a percent)		2.35%	2.35%	2.35%
Face amount of debt instrument		750,000,000	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%	99.784%
Interest rate (as a percent)		3.00%	3.00%	3.00%
Face amount of debt instrument		1,300,000,000	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	999,000,000
Discount to par (as a percent)		99.816%	99.816%	99.816%
Interest rate (as a percent)		4.375%	4.375%	4.375%
Face amount of debt instrument		1,000,000,000	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		1,199,000,000	1,198,000,000
Discount to par (as a percent)		99.863%	99.863%	99.863%
Interest rate (as a percent)		6.00%	6.00%	6.00%
Face amount of debt instrument		1,200,000,000	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%, paid September 2014
Long-term debt
Total			350,000,000
Face amount of debt instrument		350,000,000	350,000,000	350,000,000
Spread on reference interest rate (as a percent)		1.55%	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%, paid December 2014
Long-term debt
Total		650,000,000	650,000,000
Discount to par (as a percent)		99.946%	99.946%									99.946%
Interest rate (as a percent)		2.625%	2.625%									2.625%
Face amount of debt instrument		650,000,000	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%									99.79%
Interest rate (as a percent)		3.30%	3.30%									3.30%
Face amount of debt instrument		850,000,000	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%									99.707%
Interest rate (as a percent)		4.65%	4.65%									4.65%
Face amount of debt instrument		1,500,000,000	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%										99.985%
Interest rate (as a percent)		2.60%	2.60%										2.60%
Face amount of debt instrument		1,500,000,000	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%										99.771%
Interest rate (as a percent)		4.05%	4.05%										4.05%
Face amount of debt instrument		500,000,000	500,000,000										500,000,000
2012 Shelf Registration Statement-$750 issued at par in January 2014 at three-month USD LIBOR plus 0.94%, due January 2019
Long-term debt
Total		750,000,000
Face amount of debt instrument		750,000,000			750,000,000
Spread on reference interest rate (as a percent)		0.94%			0.94%
2012 Shelf Registration Statement-$1,250 issued at discount to par at a price of 99.954% in January 2014 at 2.75%, due January 2019
Long-term debt
Total		1,250,000,000
Discount to par (as a percent)		99.954%			99.954%
Interest rate (as a percent)		2.75%			2.75%
Face amount of debt instrument		1,250,000,000			1,250,000,000
EDS Senior Notes-$300 issued October 1999 at 7.45%, due October 2029
Long-term debt
Total		313,000,000	314,000,000
Interest rate (as a percent)		7.45%	7.45%											7.45%
Face amount of debt instrument		300,000,000	300,000,000											300,000,000
Other, including capital lease obligations, at 0.00%-8.50%, due in calendar years 2014-2024
Long-term debt
Other, including capital lease obligations		424,000,000	689,000,000
Minimum interest rate (as a percent)		0.00%	0.00%
Maximum interest rate (as a percent)		8.30%	8.30%
Other, including capital lease obligations, at 0.00%-8.50%, due in calendar years 2014-2024 | HP Financial Services
Long-term debt
Other, including capital lease obligations		$ 123,000,000	$ 244,000,000