Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill for the six months ended March 31, 2021, are (in millions):

	Architecture & Software		Control Products & Solutions		Intelligent Devices		Software & Control		Lifecycle Services		Total
Balance as of September 30, 2020	$	609.4	$	1,040.9	$	—	$	—	$	—	$	1,650.3
Reallocation due to change in Segments	(609.4)		(1,040.9)		535.1		497.3		617.9		—
Acquisition of businesses	—		—		—		207.0		12.8		219.8
Translation	—		—		8.0		12.2		4.7		24.9
Balance as of March 31, 2021	$	—	$	—	$	543.1	$	716.5	$	635.4	$	1,895.0

Schedule of Finite Lived and Indefinite Lived Intangible Assets by Major Class

Other intangible assets consist of (in millions):

	March 31, 2021
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	194.5	$	144.4	$	50.1
Customer relationships	369.1		108.4		260.7
Technology	224.5		94.2		130.3
Trademarks	76.7		35.4		41.3
Other	15.3		14.3		1.0
Total amortized intangible assets	880.1		396.7		483.4
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	923.8	$	396.7	$	527.1

	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