Goodwill and Intangible Assets (Tables)

3 Months Ended

Jan. 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 January 31, 2017 and changes in the respective carrying amounts during the three months then ended were as follows:

	Enterprise Group			Enterprise Services(1)		Software		Financial Services		Total
	In millions
Balance at October 31, 2016(1)	$	15,945		$	—	$	8,089	$	144	$	24,178
Goodwill acquired during the period	76			—		—		—		76
Changes due to foreign currency	(1		)	—		—		—		(1		)
Goodwill adjustments	(1		)	—		—		—		(1		)
Balance at January 31, 2017(1)	$	16,019		$	—	$	8,089	$	144	$	24,252

(1) Goodwill is net of accumulated impairment losses of $13.7 billion which were recorded prior to October 31, 2016. Of that amount, $8.0 billion relates to the Enterprise Services segment and the remaining $5.7 billion relates to the Software segment.

Schedule of Intangible Assets and Goodwill

The Company's intangible assets are composed of:

	As of January 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	$	1,453	$	(342	)	$	(856	)	$	255	$	1,394	$	(322	)	$	(856	)	$	216
Developed and core technology and patents	4,261		(1,304		)	(2,138		)	819		4,190		(1,232		)	(2,138		)	820
Trade name and trademarks	193		(24		)	(109		)	60		178		(21		)	(109		)	48
In-process research and development	30		—			—			30		—		—			—			—
Total intangible assets	$	5,937	$	(1,670	)	$	(3,103	)	$	1,164	$	5,762	$	(1,575	)	$	(3,103	)	$	1,084

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

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

Fiscal year:	In millions
2017 (remaining 9 months)	$	279
2018	278
2019	231
2020	202
2021	62
2022	34
Thereafter	48
Total	$	1,134