Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Apr. 30, 2014 item	Oct. 31, 2013
Goodwill
Balance at beginning of period	$ 31,124
Goodwill acquired during the period	12
Goodwill adjustments	(2)
Balance at end of period	31,134
Accumulated impairment loss	14,518	14,518
Number of reporting units within ES segment	2
Personal Systems
Goodwill
Balance at beginning of period		2,588
Balance at end of period	2,588	2,588
Printing
Goodwill
Balance at beginning of period		2,591
Balance at end of period	2,591	2,591
Enterprise Group
Goodwill
Balance at beginning of period	16,864
Goodwill adjustments	(4)
Balance at end of period	16,860
Enterprise Services segment
Goodwill
Balance at beginning of period	97
Goodwill adjustments	2
Balance at end of period	99
Accumulated impairment loss	7,961	7,961
Software
Goodwill
Balance at beginning of period	8,840
Goodwill acquired during the period	12
Balance at end of period	8,852
Accumulated impairment loss	5,744	5,744
HP Financial Services
Goodwill
Balance at beginning of period		144
Balance at end of period	144	144
Corporate Investments
Goodwill
Accumulated impairment loss	$ 813	$ 813