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Goodwill
 3 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill GOODWILL
Changes to the carrying amount of consolidated goodwill by segment for the three months ended 31 December 2017 are as follows:
 
 
Industrial
Gases–
Americas
 
Industrial
Gases–
EMEA
 
Industrial
Gases–
Asia
 
Industrial
Gases–
Global
 
Total
Goodwill, net at 30 September 2017
 
$
163.7

 
$
402.4

 
$
135.2

 
$
20.2

 
$
721.5

Acquisitions
 
—

 
17.3

 
36.4

 
—

 
53.7

Currency translation
 
2.3

 
10.9

 
2.5

 
(.1
)
 
15.6

Goodwill, net at 31 December 2017
 
$
166.0

 
$
430.6

 
$
174.1

 
$
20.1

 
$
790.8

 
 
31 December
 
30 September
 
 
2017
 
2017
Goodwill, gross
 
$
1,224.4

 
$
1,138.7

Accumulated impairment losses
 
(433.6
)
 
(417.2
)
Goodwill, net
 
$
790.8

 
$
721.5


We review goodwill for impairment annually in the fourth quarter of the fiscal year and whenever events or changes in circumstances indicate that the carrying value of goodwill might not be recoverable.
The accumulated impairment losses of $433.6 as of 31 December 2017 are attributable to LASA within the Industrial Gases– Americas segment and include impairment charges recorded in previous years as well as the impacts of currency translation on the losses.