Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

NOTE 14.  GOODWILL AND INTANGIBLE ASSETS

We conduct our annual impairment testing of goodwill and non-amortizing intangible assets during the fourth quarter.  The 2019, 2018 and 2017 reviews concluded that no impairment charges were necessary.  See Note 2 to the Consolidated Financial Statements for a discussion of our accounting policy for goodwill and intangible assets.

The following table details amounts related to our goodwill and intangible assets as of December 31, 2019 and 2018:

		December 31, 2019				December 31, 2018
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Amortizing intangible assets
Customer relationships	3-20 years	$	188.9	$	114.9	$	181.4	$	103.0
Developed technology	15 years		85.0		72.1		84.3		66.5
Trademarks and brand names	5-20 years		3.9		0.6		1.1		0.2
Other	Various		0.3		0.1		5.6		1.2
Total		$	278.1	$	187.7	$	272.4	$	170.9
Non-amortizing intangible assets
Trademarks and brand names	Indefinite		321.5				321.3
Total intangible assets		$	599.6			$	593.7
Goodwill	Indefinite	$	53.0			$	19.2

The increase in goodwill as of December 31, 2019 resulted from the acquisitions of ACGI and MRK, net of foreign exchange movements. See Note 6 to the Consolidated Financial Statements for additional details.

	2019		2018		2017
Amortization expense	$	19.9	$	15.1	$	14.6

The expected annual amortization expense for the years 2020 through 2024 are as follows:

2020	$	18.6
2021		17.2
2022		11.1
2023		10.7
2024		10.3