Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Additional Paid-in Capital	Former Parent Company Investment	(Accumulated Deficit) Retained Earnings	(Accumulated Deficit) Retained Earnings Everett SpinCo, Inc.	(Accumulated Deficit) Retained Earnings Seattle SpinCo, Inc.	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Everett SpinCo, Inc.	Accumulated Other Comprehensive Loss Seattle SpinCo, Inc.	Equity Attributable to the Company	Equity Attributable to the Company Everett SpinCo, Inc.	Equity Attributable to the Company Seattle SpinCo, Inc.	Non- controlling Interests	Non- controlling Interests Everett SpinCo, Inc.	Total Equity	Total Equity Everett SpinCo, Inc.	Total Equity Seattle SpinCo, Inc.
Balance at Oct. 31, 2015			$ 0	$ 0	$ 38,550	$ 0			$ (5,015)			$ 33,535			$ 383		$ 33,918
Balance (in shares) at Oct. 31, 2015			0
Increase (Decrease) in Stockholders' Equity
Separation-related adjustments					(1,236)							(1,236)					(1,236)
Issuance of common stock and reclassification of former Parent company investment (in shares)			1,803,719
Issuance of common stock and reclassification of former Parent company investment			$ 18	37,296	(37,314)							0					0
Net earnings		$ 3,161				3,161						3,161			33		3,194
Other comprehensive income (loss)		(1,584)							(1,584)			(1,584)					(1,584)
Comprehensive income		1,577										1,577			33		1,610
Issuance of common stock in connection with employee stock plans and other (in shares)			20,374
Issuance of common stock in connection with employee stock plans and other				15								15					15
Repurchases of common stock (in shares)			(157,761)
Repurchases of common stock			$ (1)	(2,661)								(2,662)					(2,662)
Tax benefit from employee stock plans				1								1					1
Cash dividends declared						(379)						(379)					(379)
Stock-based compensation expense				597								597					597
Changes in non-controlling interests															(9)		(9)
MphasiS divestiture															(337)		(337)
Balance at Oct. 31, 2016			$ 17	35,248	0	2,782			(6,599)			31,448			70		31,518
Balance (in shares) at Oct. 31, 2016			1,666,332
Increase (Decrease) in Stockholders' Equity
Transaction							$ (3,671)	$ (6,182)		$ 2,579	$ 151		$ (1,092)	$ (6,031)		$ (30)		$ (1,122)	$ (6,031)
Net earnings		344				344						344			(1)		343
Other comprehensive income (loss)		974							974			974					974
Comprehensive income		1,318										1,318			(1)		1,317
Issuance of common stock in connection with employee stock plans and other (in shares)			66,618
Issuance of common stock in connection with employee stock plans and other				75								75					75
Repurchases of common stock (in shares)			(137,789)
Repurchases of common stock			$ (1)	(2,497)		(82)						(2,580)					(2,580)
Tax benefit from employee stock plans				137								137					137
Cash dividends declared						(429)						(429)					(429)
Stock-based compensation expense				620								620					620
Balance at Oct. 31, 2017		$ 23,505	$ 16	33,583	0	(7,238)			(2,895)			23,466			39		23,505
Balance (in shares) at Oct. 31, 2017		1,595	1,595,161
Increase (Decrease) in Stockholders' Equity
Adjustment to reduce deferred tax asset		$ 186
Transaction						164			(186)			(22)					(22)
Net earnings		1,908				1,908						1,908			(4)		1,904
Other comprehensive income (loss)		(137)							(137)			(137)					(137)
Comprehensive income		1,771										1,771			(4)		1,767
Issuance of common stock in connection with employee stock plans and other (in shares)	[1]		50,369
Issuance of common stock in connection with employee stock plans and other	[1]			27								27					27
Repurchases of common stock (in shares)			(222,227)
Repurchases of common stock			$ (2)	(3,577)		0						(3,579)					(3,579)
Cash dividends declared						(733)						(733)					(733)
Stock-based compensation expense				309								309					309
Balance at Oct. 31, 2018		$ 21,274	$ 14	30,342	$ 0	$ (5,899)			$ (3,218)			$ 21,239			$ 35		$ 21,274
Balance (in shares) at Oct. 31, 2018		1,423	1,423,303
Increase (Decrease) in Stockholders' Equity
Adjustment to reduce deferred tax asset		$ 101		$ 55

[1] In fiscal 2018, the Company recorded an adjustment of $55 million to reduce a deferred tax asset established in connection with the Separation as a reduction to Additional paid-in capital in the Consolidated Statement of Stockholders' Equity.