Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

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

	Architecture & Software			Control Products & Solutions			Total
Balance as of September 30, 2018	$	422.3		$	653.2		$	1,075.5
Acquisition of businesses	14.6			—			14.6
Translation	(4.6		)	(14.4		)	(19.0		)
Balance as of September 30, 2019	432.3			638.8			1,071.1
Acquisition of business	161.2			390.7			551.9
Translation	15.9			11.4			27.3
Balance as of September 30, 2020	$	609.4		$	1,040.9		$	1,650.3

Other Intangible Assets

Other intangible assets consist of (in millions):

	September 30, 2020
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	192.7	$	139.0	$	53.7
Customer relationships	351.3		92.5		258.8
Technology	165.8		84.0		81.8
Trademarks	71.7		31.3		40.4
Other	14.4		13.5		0.9
Total amortized intangible assets	795.9		360.3		435.6
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	839.6	$	360.3	$	479.3

	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