Goodwill and Other Assets (Tables)

12 Months Ended

Dec. 31, 2017

The changes in carrying amounts of goodwill within the Company's segments are summarized as follows:



	Services			Software			Systems			Total
Goodwill	$	452.2		$	—		$	—		$	452.2
Accumulated impairment losses	(290.7		)	—			—			(290.7		)
Balance at January 1, 2016	161.5			—			—			161.5
Goodwill acquired	459.1			238.7			184.8			882.6
Goodwill adjustment	(0.5		)	—			—			(0.5		)
Currency translation adjustment	(20.8		)	(13.8		)	(10.7		)	(45.3		)
Goodwill	890.0			224.9			174.1			1,289.0
Accumulated impairment losses	(290.7		)	—			—			(290.7		)
Balance at December 31, 2016	599.3			224.9			174.1			998.3
Goodwill acquired	5.6			—			—			5.6
Goodwill adjustment	(1.1		)	(1.0		)	(0.8		)	(2.9		)
Currency translation adjustment	62.7			30.1			23.3			116.1
Goodwill	957.2			254.0			196.6			1,407.8
Accumulated impairment losses	(290.7		)	—			—			(290.7		)
Balance at December 31, 2017	$	666.5		$	254.0		$	196.6		$	1,117.1

The following summarizes information on intangible assets by major category:



		December 31, 2017							December 31, 2016
	Weighted-average remaining useful lives	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships, net	7.7 years	$	741.5	$	(108.2	)	$	633.3	$	621.7	$	(25.4	)	$	596.3

Internally-developed software	2.6 years	192.9		(99.8		)	93.1		151.0		(53.2		)	97.8
Development costs non-software	1.3 years	55.3		(35.1		)	20.2		48.4		(9.7		)	38.7
Other	1.7 years	84.5		(57.3		)	27.2		85.3		(45.2		)	40.1
Other intangible assets, net		332.7		(192.2		)	140.5		284.7		(108.1		)	176.6

Total	4.1 years	$	1,074.2	$	(300.4	)	$	773.8	$	906.4	$	(133.5	)	$	772.9

The expected annual amortization expense is as follows: