|AMAZON COM INC filed this Form 10-K on 01/30/2013|
tangible assets and intangible assets acquired and liabilities assumed based on their estimated fair values on the acquisition date, with the remaining unallocated purchase price recorded as goodwill. The fair value assigned to identifiable intangible assets acquired was determined primarily by using the income and cost approaches. These intangible assets are being amortized on a straight-line or accelerated basis over their respective useful lives.
Pro forma results of operations have not been presented because the effects of these acquisitions, individually and in the aggregate, were not material to our consolidated results of operations.
The goodwill of the acquired companies is generally not deductible for tax purposes and is primarily related to expected improvements in fulfillment center productivity and sales growth from future product offerings and customers, together with certain intangible assets that do not qualify for separate recognition.
The following summarizes our goodwill activity in 2012 and 2011 by segment (in millions):
Acquired intangible assets, included within Other assets on our consolidated balance sheets, consist of the following (in millions):