Goodwill and Acquired Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Operating Segment

The following table identifies the activity relating to goodwill by operating segment:

In millions	Balance, December 31, 2016		Adjustments		Currency Translation Adjustments		Balance, September 30, 2017
Goodwill
Americas Data and Analytics	$	251	$	2	$	—	$	253
International Data and Analytics	139		—		6		145
Total goodwill	$	390	$	2	$	6	$	398

Gross Carrying Amount and Accumulated Amortization for Teradata's Acquired Intangible Assets

The gross carrying amount and accumulated amortization for the Company's acquired intangible assets were as follows:

		September 30, 2017					December 31, 2016
In millions	Amortization Life (in Years)	Gross Carrying Amount		Accumulated Amortization and Currency Translation Adjustments			Gross Carrying Amount		Accumulated Amortization and Currency Translation Adjustments
Acquired intangible assets
Intellectual property/developed technology	3 to 5	$	41	$	(18	)	$	71	$	(61	)
Trademarks/trade names	5	—		—			1		(1		)
In-process research and development	5	5		(5		)	5		(4		)
Total acquired intangible assets		$	46	$	(23	)	$	77	$	(66	)

Aggregate Amortization Expense for Acquired Intangible Assets

The aggregate amortization expense (actual and estimated) for acquired intangible assets is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
In millions	2017		2016		2017		2016
Amortization expense	$	3	$	2	$	6	$	9

	Actual		For the years ended (estimated)
In millions	2016		2017		2018		2019		2020		2021		2022
Amortization expense	$	10	$	8	$	7	$	5	$	4	$	4	$	1