Consolidated and Combined Statements of Cash Flows (Parenthetical) - USD ($)			3 Months Ended	12 Months Ended
	Aug. 31, 2017	Apr. 01, 2017	Oct. 31, 2017	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Jul. 31, 2017	Dec. 30, 2016
Restructuring charges				$ 417,000,000	$ 417,000,000	$ 197,000,000
issuance of debt				2,259,000,000	1,074,000,000	$ 866,000,000
Face amount of debt instrument					$ 0			$ 14,600,000,000
Spinoff
Pension funding payments				1,900,000,000
Everett SpinCo, Inc.
issuance of debt				3,500,000,000
HPE
Restructuring charges				296,000,000
HPE | Everett SpinCo, Inc. | Spinoff
Due to HPE		$ 3,000,000,000		3,000,000,000
HPE | Seattle SpinCo, Inc. | Spinoff
Due to HPE	$ 2,500,000,000		$ 2,500,000,000
Term loan facility | HPE | Seattle SpinCo, Inc.
Face amount of debt instrument			$ 2,600,000,000.0	$ 2,600,000,000.0			$ 2,600,000,000.0