Goodwill and Other Intangibles

Goodwill

The following is a progression of goodwill by reportable segment:



	Chemicals			Plastics			Other		Total
Balance at September 30, 2017	$	362.8		$	276.7		$	63.5	$	703.0
Foreign currency translation	(0.4		)	(2.0		)	—		(2.4		)
Balance at June 30, 2018	$	362.4		$	274.7		$	63.5	$	700.6

Goodwill amounts by reportable segment at June 30, 2018 include the allocation of the purchase consideration of the Ultra Chem Acquisition as of the Ultra Chem Closing Date. See Note 3.

Goodwill Impairment Test

Goodwill is tested for impairment annually as of March 31 and whenever events or circumstances make it more likely than not that an impairment may have occurred. Goodwill is reviewed for impairment at the reporting unit level, or operating segment, for the Company. The Company performed an impairment test as of March 31 2018 and concluded that goodwill was not impaired. For purposes of the impairment testing of the Company's recognized goodwill, fair value measurements are determined using the income approach, based largely on inputs that are not observable to active markets, which would be deemed Level 3 fair value measurements as defined in Note 9.

The evaluation of goodwill requires the use of estimates about future operating results of each reporting unit to determine its estimated fair value. Changes in forecasted operations can materially affect these estimates, which could materially affect the Company’s results of operations. The estimate of fair value requires significant judgment and is based on management’s fair value estimates on assumptions that are believed to be reasonable but that are unpredictable and inherently uncertain, including: estimates of future growth rates, operating margins and assumptions about the overall economic climate as well as the competitive environment for the reporting units. There can be no assurance that these estimates and assumptions made for purposes of the goodwill testing as of the time of testing will prove to be accurate. If assumptions regarding business plans, competitive environments or anticipated growth rates are not correct, the Company may be required to record goodwill impairment charges in future periods, whether in connection with future annual impairment testing, or earlier, if an indicator of an impairment is present prior to the next annual evaluation.

Other Intangible Assets

Definite-lived intangible assets at June 30, 2018 and September 30, 2017 consisted of the following:



		June 30, 2018							September 30, 2017
	Estimated Useful Life (years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer-related	5-13	$	239.8	$	(39.0	)	$	200.8	$	234.6	$	(23.7	)	$	210.9
Supplier-related	6-10	3.2		(0.3		)	2.9		1.5		(0.1		)	1.4
Trade name	2-10	23.3		(11.2		)	12.1		22.3		(7.0		)	15.3
Below-market leases	1-7	0.7		(0.5		)	0.2		0.7		(0.3		)	0.4
Non-compete agreements	3-10	4.6		(1.7		)	2.9		4.2		(0.7		)	3.5
Total		$	271.6	$	(52.7	)	$	218.9	$	263.3	$	(31.8	)	$	231.5

Amortization expense recognized on the intangible assets described above was as follows:



	Three Months Ended June 30,				Nine Months Ended June 30,
	2018		2017		2018		2017
Amortization expense	$	7.1	$	6.7	$	21.0	$	18.0