Borrowings (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 04, 2015	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Notes Payable and Short-Term Borrowings
Current portion of long-term debt		$ 2,321	$ 2,655
Amount outstanding		$ 2,885	$ 3,486
Current portion of long-term debt, weighted average interest rate (as a percent)		3.20%	2.20%
Long term debt redeemed and repaid		$ 15,867	$ 6,037	$ 5,721
Commercial paper
Notes Payable and Short-Term Borrowings
Amount outstanding		$ 39	$ 298
Weighted average interest rate (as a percent)		0.30%	0.50%
HP Financial Services | Commercial paper
Notes Payable and Short-Term Borrowings
Amount outstanding		$ 39	$ 298
U.S. Dollar Global Notes
Notes Payable and Short-Term Borrowings
Long term debt redeemed and repaid	$ 2,100
Obligation related to notes payable to banks, lines of credit, uncommitted line of credit and other debt
Notes Payable and Short-Term Borrowings
Amount outstanding		$ 525	$ 533
Weighted average interest rate (as a percent)		3.10%	4.00%
Obligation related to notes payable to banks, lines of credit, uncommitted line of credit and other debt | HP Financial Services
Notes Payable and Short-Term Borrowings
Amount outstanding		$ 374	$ 404