Goodwill and Other Intangible Assets

6 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill for the six months ended March 31, 2019, are (in millions):



	Architecture & Software			Control Products & Solutions			Total
Balance as of September 30, 2018	$	422.3		$	653.2		$	1,075.5
Acquisition of business	14.6			—			14.6
Translation	(0.2		)	(3.5		)	(3.7		)
Balance as of March 31, 2019	$	436.7		$	649.7		$	1,086.4

Other intangible assets consist of (in millions):



	March 31, 2019
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	190.6	$	123.3	$	67.3
Customer relationships	113.0		69.0		44.0
Technology	112.1		67.3		44.8
Trademarks	32.6		25.8		6.8
Other	11.0		9.9		1.1
Total amortized intangible assets	459.3		295.3		164.0
Allen-Bradley^® trademark not subject to amortization	43.7		—		43.7
Total	$	503.0	$	295.3	$	207.7

5. Goodwill and Other Intangible Assets (continued)



	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

Estimated amortization expense is $25.3 million in 2019, $22.7 million in 2020, $22.0 million in 2021, $20.0 million in 2022 and $18.8 million in 2023.

We performed our annual evaluation of goodwill and indefinite life intangible assets for impairment as required by accounting principles generally accepted in the United States (U.S. GAAP) during the second quarter of 2019 and concluded that these assets are not impaired.