Goodwill and Identifiable Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Identifiable Intangible Assets

In 2018, we used a combination of qualitative and quantitative factors to review goodwill and identifiable intangible assets for impairment for all of our reporting units. As a result of performing these assessments, we determined that no impairment existed as of December 31, 2018 and, therefore, there were no write-downs to any of our goodwill or identifiable intangible assets not subject to amortization.

Goodwill

The following table provides information regarding changes in goodwill (in millions):



	Aviation Segment			Land Segment			Marine Segment			Total
As of December 31, 2016	$	266.9		$	496.7		$	72.3		$	835.9
2017 acquisitions	51.2			12.2			—			63.5
Adjustment of purchase price allocations	6.2			(0.1		)	—			6.0
Impairment charge	—			—			(72.3		)	(72.3		)
Foreign currency translation of non-USD functional currency subsidiary goodwill	2.7			9.8						12.5
As of December 31, 2017	326.9			518.5			—			845.5
2018 acquisitions	—			13.4			—			13.4
Adjustment of purchase price allocations	(2.2		)	4.5			—			2.3
Foreign currency translation of non-USD functional currency subsidiary goodwill	(1.8		)	(6.7		)	—			(8.4		)
As of December 31, 2018	$	322.9		$	529.7		$	—		$	852.7

Identifiable Intangible Assets

The following table provides information about our identifiable intangible assets (in millions):



	As of December 31, 2018						As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization ⁽¹⁾		Net		Gross Carrying Amount		Accumulated Amortization ⁽¹⁾		Net
Intangible assets subject to amortization:
Customer relationships (2)	$	373.8	$	198.7	$	175.1	$	373.8	$	171.4	$	202.4
Supplier agreements	39.0		17.6		21.4		38.7		15.4		23.4
Others	40.0		30.5		9.5		40.0		26.3		13.7
	452.8		246.8		206.0		452.5		213.1		239.4
Intangible assets not subject to amortization:
Trademark/trade name rights	39.4				39.4		40.3				40.3
	$	492.2	$	246.8	$	245.4	$	492.9	$	213.1	$	279.7

⁽¹⁾ Includes the impact of foreign exchange

⁽²⁾ Reflects recorded impairment charges for 2017 of $4.1 million and $3.0 million in our Marine and Land segments, respectively, which is presented in "Goodwill and other impairments" on our Consolidated Statement of Income.

Intangible amortization expense for 2018, 2017 and 2016 was $35.9 million, $41.9 million and $39.7 million, respectively.

The future estimated amortization of our identifiable intangible assets is as follows (in millions):



Year Ended December 31,
2019	$	33.4
2020	31.5
2021	29.1
2022	27.7
2023	19.6
Thereafter	64.7
	$	206.0