Goodwill and Intangible Assets (Tables)

9 Months Ended

Jul. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Allocation and Changes in the Carrying Amount of Goodwill

Goodwill allocated to the Company's reportable segments as of July 31, 2017 and changes in the respective carrying amounts during the nine months then ended were as follows:

	Enterprise Group			Software		Financial Services		Total
	In millions
Balance at October 31, 2016	$	15,945		$	8,089	$	144	$	24,178
Goodwill acquired during the period	1,313			—		—		1,313
Changes due to foreign currency	1			—		—		1
Goodwill adjustments	(1		)	—		—		(1		)
Balance at July 31, 2017	$	17,258		$	8,089	$	144	$	25,491

Schedule of Intangible Assets

The Company's intangible assets are composed of:

	As of July 31, 2017										As of October 31, 2016
	Gross		Accumulated Amortization			Accumulated Impairment Loss			Net		Gross		Accumulated Amortization			Accumulated Impairment Loss			Net
	In millions
Customer contracts, customer lists and distribution agreements	$	1,487	$	(334	)	$	(856	)	$	297	$	1,394	$	(322	)	$	(856	)	$	216
Developed and core technology and patents	4,555		(1,460		)	(2,138		)	957		4,190		(1,232		)	(2,138		)	820
Trade name and trademarks	214		(32		)	(109		)	73		178		(21		)	(109		)	48
In-process research and development	84		—			—			84		—		—			—			—
Total intangible assets	$	6,340	$	(1,826	)	$	(3,103	)	$	1,411	$	5,762	$	(1,575	)	$	(3,103	)	$	1,084

Schedule of Estimated Future Amortization Expense Related to Finite-lived Intangible Assets

As of July 31, 2017, estimated future amortization expense related to finite-lived intangible assets was as follows:

Fiscal year:	In millions
2017 (remaining 3 months)	$	113
2018	383
2019	306
2020	248
2021	107
2022	78
Thereafter	92
Total	$	1,327