GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of acquired intangible assets during the six months ended June 30, 2018 are summarized as follows (in millions):



	Trademarks and Tradenames			Customer Relationships			Patents and Technology			Land Use Rights			Total
Gross carrying amounts:
Balance as of December 31, 2017	$	208.4		$	600.4		$	160.0		$	9.1		$	977.9
Foreign currency translation	(3.1		)	(10.1		)	(2.7		)	(0.2		)	(16.1		)
Balance as of June 30, 2018	$	205.3		$	590.3		$	157.3		$	8.9		$	961.8



	Trademarks and Tradenames			Customer Relationships			Patents and Technology			Land Use Rights		Total
Accumulated amortization:
Balance as of December 31, 2017	$	61.4		$	279.7		$	73.4		$	3.0	$	417.5
Amortization expense and impairment charge	8.1			20.5			5.2			0.1		33.9
Foreign currency translation	(1.0		)	(7.2		)	(1.9		)	—		(10.1		)
Balance as of June 30, 2018	$	68.5		$	293.0		$	76.7		$	3.1	$	441.3



	Trademarks and Tradenames
Indefinite-lived intangible assets:
Balance as of December 31, 2017	$	88.6
Foreign currency translation	(1.0		)
Balance as of June 30, 2018	$	87.6

The Company currently amortizes certain acquired intangible assets, primarily on a straight-line basis, over their estimated useful lives, which range from three to 50 years.

Changes in the carrying amount of goodwill during the six months ended June 30, 2018 are summarized as follows (in millions):



	North America		South America			Europe/Middle East			Asia/ Pacific/Africa			Consolidated
Balance as of December 31, 2017	$	611.1	$	136.4		$	671.0		$	122.9		$	1,541.4
Adjustment	—		—			1.9			—			1.9
Foreign currency translation	—		(19.3		)	(18.2		)	(2.1		)	(39.6		)
Balance as of June 30, 2018	$	611.1	$	117.1		$	654.7		$	120.8		$	1,503.7

Goodwill is tested for impairment on an annual basis and more often if indications of impairment exist. The Company conducts its annual impairment analyses as of October 1 each fiscal year.