Goodwill and Other Intangible Assets

12 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Changes in the carrying amount of goodwill were (in millions):

	Architecture & Software			Control Products & Solutions			Total
Balance as of September 30, 2017	$	417.2		$	660.5		$	1,077.7
Acquisition of businesses	6.8			—			6.8
Translation	(1.7		)	(7.3		)	(9.0		)
Balance as of September 30, 2018	422.3			653.2			1,075.5
Acquisition of business	14.6			—			14.6
Translation	(4.6		)	(14.4		)	(19.0		)
Balance as of September 30, 2019	$	432.3		$	638.8		$	1,071.1

Other intangible assets consist of (in millions):

	September 30, 2019
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	190.6	$	128.3	$	62.3
Customer relationships	110.5		69.2		41.3
Technology	110.4		69.5		40.9
Trademarks	31.4		26.4		5.0
Other	10.6		9.7		0.9
Total amortized intangible assets	453.5		303.1		150.4
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	497.2	$	303.1	$	194.1

	September 30, 2018
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	190.9	$	118.1	$	72.8
Customer relationships	112.9		66.2		46.7
Technology	106.8		64.0		42.8
Trademarks	32.0		24.0		8.0
Other	11.2		10.0		1.2
Total amortized intangible assets	453.8		282.3		171.5
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	497.5	$	282.3	$	215.2

Computer software products represent costs of computer software to be sold, leased or otherwise marketed. Computer software products amortization expense was $10.4 million in 2019, $11.8 million in 2018 and $9.8 million in 2017.

Estimated amortization expense is $23.4 million in 2020, $22.6 million in 2021, $19.9 million in 2022, $18.7 million in 2023 and $16.8 million in 2024.

We performed our annual evaluation of goodwill and indefinite life intangible assets for impairment as required by U.S. GAAP during the second quarter of 2019 and concluded that these assets are not impaired.