Goodwill and Intangible Assets - Schedule of Allocation and Changes in the Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Goodwill
Balance at beginning of period	$ 5,622,000,000	$ 5,622,000,000
Acquisitions	346,000,000	0
Balance at end of period	5,968,000,000	5,622,000,000	$ 5,622,000,000
Accumulated impairment losses	800,000,000
Impairment loss	0	0	0
Personal Systems
Goodwill
Balance at beginning of period	2,593,000,000	2,593,000,000
Acquisitions	7,000,000	0
Balance at end of period	2,600,000,000	2,593,000,000	2,593,000,000
Printing
Goodwill
Balance at beginning of period	3,029,000,000	3,029,000,000
Acquisitions	339,000,000	0
Balance at end of period	$ 3,368,000,000	3,029,000,000	3,029,000,000
Corporate Investments
Goodwill
Accumulated impairment losses		$ 800,000,000	$ 800,000,000