Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table shows the changes in our goodwill balances from December 31, 2017 to September 30, 2018:

	(in millions)
Balance as of December 31, 2017	$	564.9
Foreign currency translation	(5.7		)
Balance as of September 30, 2018	$	559.2

Schedule of Intangible Assets

The following table summarizes our intangible assets: 

	As of September 30, 2018								As of December 31, 2017
(in millions)	Gross		Accumulated Amortization			Net		Weighted Average Useful  Life (years)	Gross		Accumulated Amortization			Net		Weighted Average Useful  Life (years)
Intellectual property	$	31.4	$	(29.1	)	$	2.3	9	$	31.5	$	(28.9	)	$	2.6	9
Customer-related assets	154.4		(111.4		)	43.0		12	156.6		(108.1		)	48.5		12
Supplier relationships	0.3		(0.2		)	0.1		20	0.2		(0.1		)	0.1		20
Technology-based assets	127.1		(93.5		)	33.6		7	127.9		(84.2		)	43.7		7
Non-competition agreements	2.4		(2.1		)	0.3		5	2.5		(2.0		)	0.5		5
Total intangible assets	$	315.6	$	(236.3	)	$	79.3	10	$	318.7	$	(223.3	)	$	95.4	10

Schedule of Intangible Asset, Amortization Expense

The following table summarizes our amortization expense related to intangible assets:

	Three months ended September 30,				Nine months ended September 30,
(in millions)	2018		2017		2018		2017
Amortization expense	$	5.2	$	5.5	$	15.7	$	18.1

Schedule of Expected Amortization Expense

We expect intangible amortization expense for the remainder of 2018 and subsequent years as follows:

	(in millions)
Remainder of 2018 (from October 1 through December 31)	$	4.9
2019	19.1
2020	16.2
2021	12.9
2022	5.1
Thereafter	21.1

Our estimates of future amortization expense for intangible assets may be affected by acquisitions, divestitures, changes in the estimated average useful lives, and foreign currency translation.