revenue. Sales to customers generally include a right of return. Sales returns have not historically been significant to our revenues and have been within the estimates made by management.
Many of our products are designed and engineered
to meet customer specifications. These activities and the testing of our products to determine compliance with those specifications occur prior to any revenue being recognized. Products are then manufactured and sold to customers. Customer
arrangements do not involve post-installation or post-sale testing and acceptance.
Impairment of Goodwill and Intangible Assets
Identification of reporting units. We have four reporting units: Sensors, Electrical Protection, Power Protection and Interconnection.
These reporting units have been identified based on the definitions and guidance provided in ASC Topic 350, IntangiblesGoodwill and Other (ASC 350), which considers, among other things, the manner in which we operate our
business and the availability of discrete financial information. We periodically review these reporting units to ensure that they continue to reflect the manner in which the business is operated. As businesses are acquired, we assign them to an
existing reporting unit or create new reporting units.
Assignment of assets, liabilities and goodwill to each reporting unit. Assets acquired and liabilities assumed are assigned to a reporting unit as of the date of acquisition. In the event we reorganize our business, we reassign the
assets, including goodwill, and the liabilities to the affected reporting units. Some assets or liabilities relate to the operations of multiple reporting units. We allocate these assets and liabilities to the reporting units based on methods that
we believe are reasonable and supportable. We apply that allocation method on a consistent basis from year to year. We view some assets and liabilities, such as cash and cash equivalents, our corporate offices, debt and deferred financing costs as
being corporate in nature. Accordingly, we do not assign these assets and liabilities to our reporting units.
Accounting policies relating to goodwill and the goodwill impairment test. Companies acquired in business combinations are recorded at
their fair value on the date of acquisition. The excess of the purchase price over the fair value of assets acquired and liabilities assumed is recognized as goodwill. As of December 31, 2009, goodwill and other intangible assets totaled $1,530.6
million and $865.5 million, respectively, or approximately 48% and 27% of our total assets, respectively.
In accordance with ASC 350, goodwill and intangible assets determined to have an indefinite useful life are not amortized. Instead, these
assets are evaluated for impairment on an annual basis and whenever events or business conditions change that could more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. We perform our annual evaluation of
goodwill and other intangible assets for impairment at the reporting unit level in the fourth quarter of each fiscal year.
The first step of our annual evaluation is to compare the estimated fair value of the reporting units to their respective carrying values to
determine whether there is an indicator of potential impairment. Our judgments regarding the existence of impairment indicators are based on several factors, including the performance of the end-markets served by our customers as well as the actual
financial performance of our reporting units and their respective financial forecasts over the long-term.
If the carrying amount of a reporting unit exceeds its estimated fair value, we conduct a second step, which is comprised of additional
factors in assessing the fair value of goodwill. If the carrying amount of the reporting units goodwill exceeds the calculated implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. The implied
fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. The fair value of the reporting unit is allocated to all of the assets and liabilities of that unit (including any unrecognized
intangible assets such as the assembled workforce) as if the reporting unit had been acquired in a business combination and the fair value of the reporting unit was the purchase price paid to acquire the reporting unit.