Goodwill (Tables)

12 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Carrying Amount of Goodwill by Segment

Changes to the carrying amount of consolidated goodwill by segment are as follows:

	Industrial Gases– Americas			Industrial Gases– EMEA			Industrial Gases– Asia		Industrial Gases– Global		Total
Goodwill, net at 30 September 2015	$	297.6		$	386.5		$	133.1	$	19.9	$	837.1
Currency translation	11.5			(5.9		)	2.1		.3		8.0
Goodwill, net at 30 September 2016	$	309.1		$	380.6		$	135.2	$	20.2	$	845.1
Impairment loss	(145.3		)	—			—		—		(145.3		)
Acquisitions	—			3.5			—		—		3.5
Currency translation	(.1		)	18.3			—		—		18.2
Goodwill, net at 30 September 2017	$	163.7		$	402.4		$	135.2	$	20.2	$	721.5

30 September	2017			2016			2015
Goodwill, gross	$	1,138.7		$	1,103.7		$	1,080.8
Accumulated impairment losses	(417.2		)	(258.6		)	(243.7		)
Goodwill, net	$	721.5		$	845.1		$	837.1