Goodwill and Other Intangible Assets

Note 9. Goodwill and Other Intangible Assets

The changes in the carrying amount of goodwill for the year ended December 31, 2011 were as follows (in millions):


Balance as of December 31, 2010	$	6,256
Goodwill acquired		1,118
Goodwill adjustment		(28	)

Balance as of December 31, 2011	$	7,346

Information regarding our acquisition-related intangible assets is as follows (in millions):


	As of December 31, 2010
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value
Patents and developed technology	$	915	$	506	$	409
Customer relationships		950		400		550
Trade names and other		283		198		85

Total	$	2,148	$	1,104	$	1,044


	As of December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value
Patents and developed technology	$	1,451	$	698	$	753
Customer relationships		1,288		573		715
Trade names and other		359		249		110

Total	$	3,098	$	1,520	$	1,578

Patents and developed technology, customer relationships, and trade names and other have weighted-average useful lives from the date of purchase of 5.0 years, 6.1 years, and 4.3 years. Amortization expense of acquisition-related intangible assets for the years ended December 31, 2009, 2010, and 2011 was $266 million, $314 million, and $441 million. As of December 31, 2011, expected amortization expense for acquisition-related intangible assets for each of the next five years and thereafter was as follows (in millions):


2012	$	472
2013		364
2014		297
2015		147
2016		99
Thereafter		199

	$	1,578

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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