Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

NOTE 11.  GOODWILL AND INTANGIBLE ASSETS

We conduct our annual impairment testing of goodwill and non-amortizing intangible assets during the fourth quarter.  The 2018, 2017 and 2016 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, 2018 and 2017:

		December 31, 2018				December 31, 2017
	Original Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Amortizing intangible assets
Customer relationships	7-20 years	$	181.4	$	103.0	$	176.3	$	93.9
Developed technology	15 years		84.3		66.5		83.7		60.9
Trademarks and brand names	10 years		1.1		0.2
Other	Various		5.6		1.2		5.9		1.1
Total		$	272.4	$	170.9	$	265.9	$	155.9
Goodwill and non-amortizing intangible assets
Trademarks and brand names	Indefinite		321.3				319.8
Goodwill	Indefinite		19.2				11.3
Total goodwill and intangible assets		$	612.9			$	597.0

	2018		2017		2016
Amortization expense	$	15.1	$	14.6	$	13.9

The expected annual amortization expense for the years 2019 through 2023 are as follows:

2019	$	15.6
2020	15.6
2021	14.2
2022	10.2
2023	10.2