Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

5. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill The following table provides a reconciliation of changes in goodwill for the nine months ended September 30, 2019:



	Driveline			Metal Forming			Powertrain			Casting		Consolidated
	(in millions)
Balance at December 31, 2018	$	212.1		$	552.4		$	377.3		$	—	$	1,141.8
Reorganization	187.2			190.1			(377.3		)	—		—
Foreign currency translation	(5.4		)	(8.9		)	—			—		(14.3		)
Balance at September 30, 2019	$	393.9		$	733.6		$	—		$	—	$	1,127.5

In the first quarter of 2019, we initiated a global restructuring program (the 2019 Program) to further streamline our business by consolidating our four existing segments into three segments. See Note 4 - Restructuring and Acquisition-Related Costs for further detail on this reorganization of our segments. Prior to this reorganization, our Powertrain segment was also a reporting unit for purposes of measuring and reporting goodwill. The goodwill that was previously attributable to the Powertrain reporting unit was reallocated to the Driveline and Metal Forming reporting units based on the relative fair value of the respective portions that became attributable to those reporting units.

The initiation of the 2019 Program and the reorganization of our business represented a triggering event in the first quarter of 2019 to test goodwill for impairment prior to reallocating the Powertrain goodwill to Driveline and Metal Forming. No impairment was identified as a result of completing this goodwill impairment test.

Other Intangible Assets The following table provides a reconciliation of the gross carrying amount and associated accumulated amortization for AAM's other intangible assets, which are all subject to amortization:



	September 30,							December 31,
	2019							2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in millions)
Capitalized computer software	$	41.4	$	(26.0	)	$	15.4	$	38.0	$	(20.1	)	$	17.9
Customer platforms	856.2		(158.6		)	697.6		952.2		(123.5		)	828.7
Customer relationships	53.0		(8.5		)	44.5		147.0		(16.5		)	130.5
Technology and other	155.7		(31.7		)	124.0		156.2		(22.2		)	134.0
Total	$	1,106.3	$	(224.8	)	$	881.5	$	1,293.4	$	(182.3	)	$	1,111.1

Amortization expense for our intangible assets was $23.7 million and $73.6 million for the three and nine months ended September 30, 2019, respectively, and $24.8 million and $74.5 million for the three and nine months ended September 30, 2018, respectively. Estimated amortization expense for the full year 2019 is approximately $95 million and estimated amortization expense for each of the full years 2020 through 2023 is approximately $87 million.