Goodwill and Intangible Assets (Tables)

6 Months Ended

Apr. 30, 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 April 30, 2017 and changes in the respective carrying amounts during the six 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	1,323			—		—		1,323
Changes due to foreign currency	(1		)	—		—		(1		)
Goodwill adjustments	(2		)	—		—		(2		)
Balance at April 30, 2017	$	17,265		$	8,089	$	144	$	25,498

Schedule of Intangible Assets and Goodwill

The Company's intangible assets are composed of:

	As of April 30, 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	$	1,488	$	(305	)	$	(856	)	$	327	$	1,394	$	(322	)	$	(856	)	$	216
Developed and core technology and patents	4,565		(1,378		)	(2,138		)	1,049		4,190		(1,232		)	(2,138		)	820
Trade name and trademarks	215		(27		)	(109		)	79		178		(21		)	(109		)	48
In-process research and development	85		—			—			85		—		—			—			—
Total intangible assets	$	6,353	$	(1,710	)	$	(3,103	)	$	1,540	$	5,762	$	(1,575	)	$	(3,103	)	$	1,084

Schedule of estimated future amortization expense related to finite-lived purchased intangible assets

As of April 30, 2017, estimated future amortization expense related to finite-lived intangible assets was as follows:

Fiscal year:	In millions
2017 (remaining 6 months)	$	243
2018	383
2019	306
2020	248
2021	106
2022	78
Thereafter	91
Total	$	1,455