Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

NOTE 10.  GOODWILL AND INTANGIBLE ASSETS

We conduct our annual impairment testing of non-amortizing intangible assets during the fourth quarter.  The 2017, 2016 and 2015 reviews concluded that no impairment charges were necessary.  See Note 2 to the Consolidated Financial Statements for a discussion of our accounting policy for intangible assets.

The following table details amounts related to our intangible assets as of December 31, 2017 and 2016:

		December 31, 2017				December 31, 2016
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Amortizing intangible assets
Customer relationships	20 years	$	176.3	$	93.9	$	165.3	$	84.9
Developed technology	15 years		83.7		60.9		82.8		55.4
Other	Various		5.9		1.1		6.3		1.3
Total		$	265.9	$	155.9	$	254.4	$	141.6
Non-amortizing intangible assets
Trademarks and brand names	Indefinite		319.8				314.4
Goodwill			11.3				0.5
Total goodwill and intangible assets		$	597.0			$	569.3

	2017		2016		2015
Amortization expense	$	14.6	$	13.9	$	14.0

The expected annual amortization expense for the years 2018 through 2022 are as follows:

2018	$	14.7
2019	14.7
2020	14.7
2021	13.3
2022	9.3