Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of Goodwill

The changes in the carrying value of Goodwill for the six months ended June 30, 2019 were as follows:

	Goodwill			Accumulated Impairment Losses			Total
Balance as of December 31, 2018	$	221.7		$	(39.0	)	$	182.7
Additions	11.5			—			11.5
Foreign currency fluctuations	(1.2		)	0.3			(0.9		)
Balance as of June 30, 2019	$	232.0		$	(38.7	)	$	193.3

Acquired Intangible Assets excluding Goodwill

The balances of acquired Intangible Assets, excluding Goodwill, as of June 30, 2019 and December 31, 2018, were as follows:

	Customer Lists			Trade Names			Technology			Total
Balance as of June 30, 2019
Original cost	$	156.2		$	32.2		$	17.3		$	205.7
Accumulated amortization	(42.1		)	(6.8		)	(6.7		)	(55.6		)
Carrying value	$	114.1		$	25.4		$	10.6		$	150.1
Weighted average original life (in years)	14			11			11
Balance as of December 31, 2018
Original cost	$	143.0		$	30.6		$	17.4		$	191.0
Accumulated amortization	(33.7		)	(5.3		)	(5.5		)	(44.5		)
Carrying value	$	109.3		$	25.3		$	11.9		$	146.5
Weighted average original life (in years)	15			10			10

Estimated aggregate amortization expense of Intangible Assets

Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows:

Remaining 2019	$	11.1
2020	20.8
2021	19.2
2022	17.1
2023	15.5
Thereafter	66.4
Total	$	150.1