FINANCIAL INFORMATION FOR SUBSIDIARY GUARANTORS AND NON-GUARANTORS - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Current assets:
Cash and cash equivalents	$ 120.5	$ 28.6	$ 50.8	$ 64.9
Accounts receivable, net	197.7	127.0
Accounts receivable pledged	88.9	174.7
Inventories	407.5	394.7
Assets held for sale	0.0	256.2
Prepaid and other current assets	67.1	51.7
Total current assets	881.7	1,032.9
Investment in unconsolidated affiliates	31.1	101.0
Property, plant and equipment, net	467.7	444.9
Goodwill	441.6	371.9	282.5
Intangible assets, net	748.9	690.0
Other assets	176.0	115.1
Equity investment in subsidiaries	0.0	0.0
Intercompany assets	0.0	0.0
Total assets	2,747.0	2,755.8
Current liabilities:
Current portion of debt	143.1	185.0
Accounts payable	153.1	131.2
Liabilities held for sale	0.0	213.0
Other current liabilities	248.3	177.9
Total current liabilities	544.5	707.1
Long-term debt	1,258.0	1,030.9
Distributions in excess of investment in unconsolidated affiliate	21.9	0.0
Other liabilities	260.9	283.5
Equity investment in subsidiaries	0.0	0.0
Intercompany liabilities	0.0
Total liabilities	2,085.3	2,021.5
Total equity—controlling interest	648.8	715.2
Noncontrolling interest	12.9	19.1
Total equity	661.7	734.3	633.1	567.2
Total liabilities and equity	2,747.0	2,755.8
Reportable Legal Entities | Parent
Current assets:
Cash and cash equivalents	0.0	0.0	0.0	0.0
Accounts receivable, net	0.0	0.0
Accounts receivable pledged	0.0	0.0
Inventories	0.0	0.0
Assets held for sale		0.0
Prepaid and other current assets	1.3	0.1
Total current assets	1.3	0.1
Investment in unconsolidated affiliates	0.0	0.0
Property, plant and equipment, net	0.0	0.0
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Other assets	8.1	13.2
Equity investment in subsidiaries	1,112.8	808.8
Intercompany assets	759.7	1,013.0
Total assets	1,881.9	1,835.1
Current liabilities:
Current portion of debt	15.0	15.0
Accounts payable	0.0	0.0
Liabilities held for sale		0.0
Other current liabilities	17.1	16.6
Total current liabilities	32.1	31.6
Long-term debt	1,200.7	1,085.1
Distributions in excess of investment in unconsolidated affiliate	0.0
Other liabilities	0.3	3.2
Equity investment in subsidiaries	0.0	0.0
Intercompany liabilities	0.0	0.0
Total liabilities	1,233.1	1,119.9
Total equity—controlling interest	648.8	715.2
Noncontrolling interest	0.0	0.0
Total equity	648.8	715.2
Total liabilities and equity	1,881.9	1,835.1
Reportable Legal Entities | Subsidiary Guarantors
Current assets:
Cash and cash equivalents	39.8	2.7	7.4	23.1
Accounts receivable, net	137.6	92.4
Accounts receivable pledged	88.9	174.7
Inventories	314.0	327.8
Assets held for sale		0.0
Prepaid and other current assets	43.4	23.1
Total current assets	623.7	620.7
Investment in unconsolidated affiliates	0.0	100.3
Property, plant and equipment, net	406.4	392.1
Goodwill	320.7	260.4
Intangible assets, net	606.3	560.2
Other assets	158.3	103.8
Equity investment in subsidiaries	0.0	0.0
Intercompany assets	0.0	0.0
Total assets	2,115.4	2,037.5
Current liabilities:
Current portion of debt	97.8	154.2
Accounts payable	124.9	108.8
Liabilities held for sale		0.0
Other current liabilities	191.5	143.3
Total current liabilities	414.2	406.3
Long-term debt	508.6	575.7
Distributions in excess of investment in unconsolidated affiliate	21.9
Other liabilities	197.4	221.9
Equity investment in subsidiaries	82.6	161.0
Intercompany liabilities	17.1	100.2
Total liabilities	1,241.8	1,465.1
Total equity—controlling interest	873.6	572.4
Noncontrolling interest	0.0	0.0
Total equity	873.6	572.4
Total liabilities and equity	2,115.4	2,037.5
Reportable Legal Entities | Non- Guarantors
Current assets:
Cash and cash equivalents	80.7	25.9	43.4	41.8
Accounts receivable, net	60.1	34.6
Accounts receivable pledged	0.0	0.0
Inventories	93.5	66.9
Assets held for sale		256.2
Prepaid and other current assets	22.4	28.5
Total current assets	256.7	412.1
Investment in unconsolidated affiliates	31.1	0.7
Property, plant and equipment, net	61.3	52.8
Goodwill	109.3	99.9
Intangible assets, net	133.8	119.6
Other assets	9.6	0.6
Equity investment in subsidiaries	0.0	0.0
Intercompany assets	0.0	0.0
Total assets	601.8	685.7
Current liabilities:
Current portion of debt	45.3	30.8
Accounts payable	28.2	22.4
Liabilities held for sale		213.0
Other current liabilities	39.7	18.0
Total current liabilities	113.2	284.2
Long-term debt	108.0	23.0
Distributions in excess of investment in unconsolidated affiliate	0.0
Other liabilities	58.2	56.0
Equity investment in subsidiaries	0.0	0.0
Intercompany liabilities	152.7	234.1
Total liabilities	432.1	597.3
Total equity—controlling interest	169.7	88.4
Noncontrolling interest	0.0	0.0
Total equity	169.7	88.4
Total liabilities and equity	601.8	685.7
Eliminations/ Consolidations
Current assets:
Cash and cash equivalents	0.0	0.0	$ 0.0	$ 0.0
Accounts receivable, net	0.0	0.0
Accounts receivable pledged	0.0	0.0
Inventories	0.0	0.0
Assets held for sale		0.0
Prepaid and other current assets	0.0	0.0
Total current assets	0.0	0.0
Investment in unconsolidated affiliates	0.0	0.0
Property, plant and equipment, net	0.0	0.0
Goodwill	11.6	11.6
Intangible assets, net	8.8	10.2
Other assets	0.0	(2.5)
Equity investment in subsidiaries	(1,112.8)	(808.8)
Intercompany assets	(759.7)	(1,013.0)
Total assets	(1,852.1)	(1,802.5)
Current liabilities:
Current portion of debt	(15.0)	(15.0)
Accounts payable	0.0	0.0
Liabilities held for sale		0.0
Other current liabilities	0.0	0.0
Total current liabilities	(15.0)	(15.0)
Long-term debt	(559.3)	(652.9)
Distributions in excess of investment in unconsolidated affiliate	0.0
Other liabilities	5.0	2.4
Equity investment in subsidiaries	(82.6)	(161.0)
Intercompany liabilities	(169.8)	(334.3)
Total liabilities	(821.7)	(1,160.8)
Total equity—controlling interest	(1,043.3)	(660.8)
Noncontrolling interest	12.9	19.1
Total equity	(1,030.4)	(641.7)
Total liabilities and equity	$ (1,852.1)	$ (1,802.5)