INVESTMENT IN UNCONSOLIDATED AFFILIATES - Joint Venture Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 1,013.3	$ 1,084.6	$ 1,234.9	$ 1,292.0
Gross margin	409.2	464.3	443.2	501.1
Selling and administrative expenses	166.0	178.8	274.2	282.9
Amortization expense			14.1	12.3
Interest expense	22.6	21.5	40.4	36.8
Net income (loss) attributable to controlling interest	148.9	165.1	127.7	99.8
Joint Ventures
Condensed Financial Statements, Captions [Line Items]
Revenue	175.7	154.7	447.9	406.8
Gross margin	8.4	9.7	84.4	70.8
Selling and administrative expenses	52.4	51.5	116.4	92.9
Amortization expense	10.3	21.7	22.4	41.9
Interest expense	18.0	16.6	35.5	33.5
Restructuring and other charges	8.3	0.0	11.9	26.6
Net income (loss) attributable to controlling interest	$ (80.6)	$ (80.1)	$ (101.8)	$ (124.1)