8. Intangible Assets

Following is a summary of the changes in the carrying amount of goodwill and other indefinite-lived intangible assets during the years ended December 31, 2018 and 2017, net of accumulated impairment losses recorded prior to December 31, 2012 of $606.3 million and $37.1 million, respectively:


			Other Indefinite-
			Lived Intangible
	Goodwill		Assets
Balance — December 31, 2016	$	1,291.2	$	420.1
Additions		324.8		40.8
Disposals		(4.5)		(1.7)
Foreign currency translation		49.0		14.8
Balance — December 31, 2017	$	1,660.5	$	474.0
Additions		144.1		29.8
Disposals		(13.8)		(0.5)
Impairment		—		(5.8)
Foreign currency translation		(38.8)		(11.3)
Balance — December 31, 2018	$	1,752.0	$	486.2

Following is a summary of the changes in the carrying amount of goodwill by reportable segment during the years ended December 31, 2018 and 2017:


			Retail
	Retail		Commercial
	Automotive		Truck		Other		Total
Balance — December 31, 2016	$	1,050.2	$	162.0	$	79.0	$	1,291.2
Additions		324.8		—		—		324.8
Disposals		(4.5)		—		—		(4.5)
Foreign currency translation		41.6		1.0		6.4		49.0
Balance — December 31, 2017	$	1,412.1	$	163.0	$	85.4	$	1,660.5
Additions		143.2		0.9		—		144.1
Disposals		(13.8)		—		—		(13.8)
Foreign currency translation		(29.6)		(1.3)		(7.9)		(38.8)
Balance — December 31, 2018	$	1,511.9	$	162.6	$	77.5	$	1,752.0

There is no goodwill recorded in our Non-Automotive Investments reportable segment.

We test for impairment of our intangible assets at least annually. During 2018, we recorded $5.8 million of impairment charges relating to our intangible assets with respect to certain franchised dealerships. We did not record any impairment charges relating to our intangible assets in 2017 or 2016.