Goodwill (Tables)

12 Months Ended

Sep. 30, 2021

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	Corporate  and other	Total
Goodwill, net at 30 September 2019	$156.3	$432.3	$178.5	$19.6	$10.4	$797.1
Acquisitions	—	66.6	—	—	4.5	71.1
Currency translation and other	(3.7)	25.2	1.9	(0.1)	—	23.3
Goodwill, net at 30 September 2020	$152.6	$524.1	$180.4	$19.5	$14.9	$891.5
Acquisitions	—	21.0	—	—	—	21.0
Currency translation and other	(1.6)	(3.6)	3.9	0.3	—	(1.0)
Goodwill, net at 30 September 2021	$151.0	$541.5	$184.3	$19.8	$14.9	$911.5

In fiscal year 2021, goodwill acquired is primarily attributable to expected cost synergies and growth opportunities related to a business combination completed in the second quarter. This goodwill is not deductible for tax purposes. Refer to Note 3, Acquisitions, for additional information.

30 September	2021	2020	2019
Goodwill, gross	$1,239.2	$1,230.2	$1,162.2
Accumulated impairment losses(A)	(327.7)	(338.7)	(365.1)
Goodwill, net	$911.5	$891.5	$797.1

(A)Accumulated impairment losses include the impacts of currency translation. These losses are attributable to our Latin America reporting unit ("LASA") within the Industrial Gases – Americas segment.