Intangible Assets, net

12 Months Ended

Dec. 31, 2014

Note 6. Intangible Assets, net

Intangible assets, net, consisted of the following:

			December 31, 2014					December 31, 2013
	Weighted Average Amortizable Life in Years		Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
			(in millions)
Intangible assets subject to amortization:
Covenants not to compete		4.3	$	2.3	$	(1.7	)	$	8.0	$	(7.3	)
Loan fees		3.8		41.5		(27.3	)		41.5		(24.1	)
Customer lists/relationships		14.3		694.7		(249.3	)		654.3		(200.6	)
Software—internal use		10.0		8.1		(7.1	)		8.1		(6.3	)
Other		5.2		7.2		(4.5	)		7.4		(2.7	)

				753.8		(289.9	)		719.3		(241.0	)
Intangible assets not subject to amortization:
Trade names				777.7		—			735.5		—

			$	1,531.5	$	(289.9	)	$	1,454.8	$	(241.0	)

Intangible assets recorded in connection with our 2014 acquisitions and consolidation of a joint venture entity were approximately $92.6 million. Foreign currency translation losses related to intangible assets, net, in 2014 were approximately $8.1 million. Impairment losses of $14.9 million were recognized during the year ended December 31, 2013 related to one of our trade names. No impairment losses were recognized during the year ended December 31, 2014.

Amortization expense for intangible assets amounted to approximately $56.7 million, $54.9 million and $45.4 million for the years ended December 31, 2014, 2013 and 2012, respectively.

The following is a summary of estimated aggregate amortization expense for each of the next five years:

	(in millions)
2015	$	57.1
2016		55.4
2017		50.9
2018		44.8
2019		44.0