Goodwill And Acquired Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill And Acquired Intangible Assets [Abstract]

Schedule Of Goodwill By Operating Segment

In millions	Balance December 31, 2010		Additions		Currency Translation Adjustments			Balance December 31, 2011
Goodwill
Americas	$	85	$	457	$	1		$	543
EMEA		17		107		(4	)		120
APJ		34		43		2			79
Total goodwill	$	136	$	607	($	1	)	$	742

Schedule Of Gross Carrying Amount And Accumulated Amortization For Teradata's Acquired Intangible Assets

	Original Amortization Life (in Years)		December 31, 2011					December 31, 2010
In millions			Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Acquired intangible assets
Intellectual property/developed technology		5 to 7		122		(23	)		18		(6	)
Customer relationships		4 to 10		55		(6	)		0		0
Trademarks/trade names		5 to 10		11		(1	)		0		0
In-process research and development		5		5		0			0		0
Non-compete agreements		2		1		(1	)		0		0
Total		2 to 10		194		(31	)		18		(6	)

Schedule Of The Aggregate Amortization Expense For Identifiable Intangible Assets

	Actual 2011		For the year ended (estimated)
In millions			2012		2013		2014		2015		2016
Amortization expense	$	25	$	30	$	29	$	29	$	27	$	19