Goodwill and Intangible Assets, net

Changes in the carrying values of goodwill for the six months ended June 30, 2018, were as follows (in millions):



	Segment
	Electrical			Power			Total
BALANCE DECEMBER 31, 2017	$	717.6		$	371.4		$	1,089.0
Current year acquisitions (Note 3 – Business Acquisitions)	—			679.0			679.0
Foreign currency translation and prior year acquisitions	(1.2		)	(7.1		)	(8.3		)
BALANCE JUNE 30, 2018	$	716.4		$	1,043.3		$	1,759.7

In the first six months of 2018, the Company completed one acquisition (Aclara) that was added to the Power segment. This acquisition has been accounted for as a business combination and has resulted in the recognition of $679.0 million of goodwill. See Note 3 – Business Acquisitions in the Notes to Condensed Consolidated Financial Statements for additional information.

The Company performs its goodwill impairment testing as of April 1st of each year, unless circumstances dictate the need for more frequent assessments. For the 2018 test, the Company applied the "Step-zero" test to six of its seven reporting units, which allows the Company to first assess qualitative factors to determine whether it is more likely than not that a reporting unit's fair value is greater than its carrying amount. Based on the qualitative assessment, the Company concluded that it was more likely than not that the fair value of these reporting units substantially exceeded their carrying values and therefore, further quantitative analysis was not required. For the seventh reporting unit, the Company has elected to utilize the two step goodwill impairment testing process as permitted in the accounting guidance. Step 1 compared the fair value of the Company's reporting units to their carrying values. If the fair value of the reporting unit exceeds its carrying value, no further analysis is necessary. If the carrying value of the reporting unit exceeds its fair value, Step 2 must be completed to quantify the amount of impairment.

Goodwill impairment testing requires judgment, including the identification of reporting units, assigning assets and liabilities to reporting units and determining the fair value of each reporting unit. Significant judgment is required to estimate the fair value of reporting units including estimating future cash flows, determining appropriate discount rates and other assumptions. The Company uses internal discounted cash flow estimates to determine fair value. These cash flow estimates are derived from historical experience and future long-term business plans and the application of discount rates determined by management to be appropriate. Changes in these estimates and assumptions could affect the determination of fair value and/or goodwill impairment for each reporting unit. The Company believes that its estimated aggregate fair value of its reporting units is reasonable when compared to the Company's market capitalization on the valuation date.

As of April 1, 2018, the impairment testing resulted in implied fair values for each reporting unit that exceeded the reporting unit's carrying value, including goodwill. The Company did not have any reporting units at risk of failing Step 1 of the impairment test as the excess of the implied fair value significantly exceeded the carrying value of the reporting units. Additionally, the Company did not have any reporting units with zero or negative carrying amounts.

The Company performs its assessment of indefinite-lived intangible assets as of April 1st of each year, unless circumstances dictate the need for more frequent assessments. The identification and measurement of impairment of indefinite-lived intangible assets involves an assessment of qualitative factors to determine whether events or circumstances indicate that it is more likely than not that an indefinite-lived intangible asset is impaired. If it is more likely than not that the asset is impaired, the fair value of the indefinite lived intangibles will be estimated using a discounted cash flow approach. If the carrying value of these assets exceeds the estimated fair value, the carrying value will be reduced to the estimated fair value. As of April 1, 2018, based on the qualitative assessments, the Company concluded it was more likely than not that the fair value of indefinite-lived intangible assets substantially exceeded their carrying and therefore, further quantitative analysis was not required and those assets were not impaired.

The carrying value of other intangible assets included in Intangible assets, net in the Condensed Consolidated Balance Sheet is as follows (in millions):



	June 30, 2018					December 31, 2017
	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Definite-lived:
Patents, tradenames and trademarks	$	205.3	$	(54.6	)	$	151.4	$	(50.1	)
Customer/agent relationships and other	845.5		(184.1		)	462.0		(156.7		)
Total	$	1,050.8	$	(238.7	)	$	613.4	$	(206.8	)
Indefinite-lived:
Tradenames and other	53.5		—			53.8		—
TOTAL	$	1,104.3	$	(238.7	)	$	667.2	$	(206.8	)

Amortization expense associated with definite-lived intangible assets was $34.6 million and $17.5 million for the six months ended June 30, 2018 and 2017, respectively. Future amortization expense associated with these intangible assets is expected to be $37.5 million for the remainder of 2018, $77.8 million in 2019, $76.2 million in 2020, $74.5 million in 2021, $66.1 million in 2022, and $59.5 million in 2023.