Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill for the six months ended March 31, 2018, are (in millions):

	Architecture & Software		Control Products & Solutions		Total
Balance as of September 30, 2017	$	417.2	$	660.5	$	1,077.7
Acquisition of business	6.8		—		6.8
Translation	5.0		14.8		19.8
Balance as of March 31, 2018	$	429.0	$	675.3	$	1,104.3

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

Other intangible assets consist of (in millions):

	March 31, 2018
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	197.7	$	119.1	$	78.6
Customer relationships	118.0		67.2		50.8
Technology	109.0		62.7		46.3
Trademarks	33.8		23.9		9.9
Other	12.0		10.4		1.6
Total amortized intangible assets	470.5		283.3		187.2
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	514.2	$	283.3	$	230.9

	September 30, 2017
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	194.8	$	113.2	$	81.6
Customer relationships	114.5		61.5		53.0
Technology	104.8		57.9		46.9
Trademarks	32.3		21.1		11.2
Other	11.4		9.8		1.6
Total amortized intangible assets	457.8		263.5		194.3
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	501.5	$	263.5	$	238.0