Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Details of Intangible Assets Other Than Goodwill

The following table presents details of the Company’s intangible assets other than goodwill as of December 31, 2018 and 2017 (in millions):

	2018						2017
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer base	$	1,911.2	$	1,103.5	$	807.7	$	1,930.3	$	935.2	$	995.1
Trade names and trademarks		608.4		249.3		359.1		609.7		215.3		394.4
Patents and technologies		582.9		397.7		185.2		592.0		345.4		246.6
Non-compete agreements		0.3		0.3		—		0.3		0.3		—
Total intangible assets	$	3,102.8	$	1,750.8	$	1,352.0	$	3,132.3	$	1,496.2	$	1,636.1

Summary of Weighted-Average Amortization Periods

The Company’s finite-lived intangible assets are being amortized on a straight-line basis over the weighted-average amortization periods in the following table. The aggregate weighted-average amortization period is 11.8 years.

	Weighted- Average Amortization Period
	(in years)
Customer base		11.0
Trade names and trademarks		18.8
Patents and technologies		6.8

Estimated Amortization Expense for Next Five Years

Estimated amortization expense for the next five years is as follows (in millions):

	Estimated Amortization Expense
2019	$	233.6
2020		227.3
2021		207.5
2022		141.1
2023		101.7

Goodwill by Reportable Segment

The following table presents goodwill by reportable segments (in millions):

	CCS			CMS			Total
Goodwill, gross, as of December 31, 2015	$	1,986.6		$	899.7			2,886.3
Adjustments to purchase price allocations		107.7			4.4			112.1
Foreign exchange		(16.8	)		(2.3	)		(19.1	)
Goodwill, gross, as of December 31, 2016		2,077.5			901.8			2,979.3
Acquisitions		49.6			—			49.6
Foreign exchange		66.1			2.6			68.7
Goodwill, gross, as of December 31, 2017		2,193.2			904.4			3,097.6
Foreign exchange		(31.6	)		(2.7	)		(34.3	)
Goodwill, gross, as of December 31, 2018	$	2,161.6		$	901.7		$	3,063.3
Accumulated impairment charges as of December 31, 2015	$	(36.2	)	$	(159.5	)	$	(195.7	)
Impairment charges for year ended December 31, 2016		(15.3	)		—			(15.3	)
Accumulated impairment charges as of December 31, 2016, 2017 and 2018		(51.5	)		(159.5	)		(211.0	)
Goodwill, net, as of December 31, 2018	$	2,110.1		$	742.2		$	2,852.3