Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill for the six months ended March 31, 2017, are (in millions):

	Architecture & Software			Control Products & Solutions			Total
Balance as of September 30, 2016	$	414.5		$	659.4		$	1,073.9
Acquisition of business	—			0.5			0.5
Translation	(2.4		)	(8.7		)	(11.1		)
Balance as of March 31, 2017	$	412.1		$	651.2		$	1,063.3

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

Other intangible assets consist of (in millions):

	March 31, 2017
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	182.4	$	108.2	$	74.2
Customer relationships	111.3		55.0		56.3
Technology	103.2		52.4		50.8
Trademarks	30.8		18.3		12.5
Other	10.6		8.9		1.7
Total amortized intangible assets	438.3		242.8		195.5
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	482.0	$	242.8	$	239.2

	September 30, 2016
	Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Computer software products	$	182.4	$	103.4	$	79.0
Customer relationships	112.6		51.9		60.7
Technology	103.9		48.5		55.4
Trademarks	31.4		17.0		14.4
Other	11.0		8.9		2.1
Total amortized intangible assets	441.3		229.7		211.6
Allen-Bradley® trademark not subject to amortization	43.7		—		43.7
Total	$	485.0	$	229.7	$	255.3