Consolidating Financial Information - Schedule of Income Statement Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, Net	$ 1,321.8	$ 1,304.0	$ 1,170.6	$ 1,212.1	$ 1,249.8	$ 1,362.8	$ 1,211.2	$ 1,224.8
Revenues:
Net sales	1,321.8	1,303.9	1,169.9	1,211.8	1,249.7	1,361.6	1,209.6	1,218.8	$ 5,007.4	$ 5,039.7	$ 4,733.1
Net investment income									1.1	8.9	20.7
Total revenues									5,008.5	5,048.6	4,753.8
Operating costs and expenses:
Cost of goods sold									3,132.6	3,119.8	3,050.9
Selling, acquisition, operating and general expenses									1,359.6	1,355.3	1,523.8
Total operating costs and expenses									4,492.2	4,475.1	4,574.7
Operating income									516.3	573.5	179.1
Interest expense									(360.1)	(402.5)	(407.8)
Deconsolidation, Gain (Loss), Amount									0.0	0.0	38.5
Other (expense) income, net									(5.0)	4.8	10.1
Income (loss) from continuing operations before income taxes									151.2	175.8	(180.1)
Income tax expense									48.3	31.6	39.6
Net income (loss) from continuing operations	24.0	39.8	(51.4)	260.8	36.2	(93.0)	15.9	7.0	273.2	(33.9)	(512.4)
Less: Net income attributable to noncontrolling interest									167.2	164.9	44.4
Net income (loss) attributable to controlling interest	(26.2)	2.1	(82.1)	212.2	(7.3)	(132.9)	(24.7)	(33.9)	106.0	(198.8)	(556.8)
Net income (loss) attributable to common and participating preferred stockholders									106.0	(198.8)	(556.8)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(25.1)	7.7	(62.7)	250.4	44.5	(185.5)	(19.9)	(17.2)	170.3	(178.1)	(292.7)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 49.1	$ 32.1	$ 11.3	$ 10.4	$ (8.3)	$ 92.5	$ 35.8	$ 24.2	102.9	144.2	(219.7)
Consumer Products Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, Net											0.0
Revenues:
Net sales									5,007.4	5,039.7	4,690.4
Total revenues									5,007.4	5,039.7	4,690.4
Operating costs and expenses:
Cost of goods sold									3,132.6	3,119.8	3,020.0
Selling, acquisition, operating and general expenses									1,313.4	1,263.6	1,196.3
Total operating costs and expenses									4,446.0	4,383.4	4,216.3
Operating income									561.4	656.3	474.1
Equity in net income of subsidiaries											0.0
Interest expense									(211.1)	(250.0)	(271.9)
Interest Income From Affiliates											0.0
Other (expense) income, net									(5.7)	(8.6)	(8.9)
Income (loss) from continuing operations before income taxes									344.6	397.7	193.3
Income tax expense									47.5	40.0	43.9
Net income (loss) from continuing operations									297.1	357.7	149.4
Less: Net income attributable to noncontrolling interest									123.6	151.1	62.7
Net income (loss) attributable to controlling interest									173.5	206.6	86.7
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	0.0	0.0
Corporate and Other [Member]
Revenues:
Net sales											42.7
Net investment income									1.1	8.9	20.7
Total revenues									1.1	8.9	63.4
Operating costs and expenses:
Cost of goods sold											30.9
Selling, acquisition, operating and general expenses									46.8	91.7	327.5
Total operating costs and expenses									46.8	91.7	358.4
Operating income									(45.7)
Equity in net income of subsidiaries									297.1	43.0	(232.4)
Interest expense									(148.3)	(144.3)	(125.9)
Interest Income From Affiliates									11.4	(12.2)	(29.6)
Deconsolidation, Gain (Loss), Amount											38.5
Other (expense) income, net									0.7	11.1	29.8
Income (loss) from continuing operations before income taxes									115.2	(185.2)	(614.6)
Income tax expense									9.3	18.9	(17.5)
Net income (loss) from continuing operations									105.9	(204.1)	(597.1)
Less: Net income attributable to noncontrolling interest									(0.1)	(5.3)	(40.3)
Net income (loss) attributable to controlling interest									106.0	(198.8)	(556.8)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	0.0	0.0
Discontinued Operations, Held-for-sale [Member]
Revenues:
Total revenues									0.0	0.0
Operating costs and expenses:
Operating income									0.0	0.0
Net income (loss) from continuing operations									170.3	(178.1)
Less: Net income attributable to noncontrolling interest									43.7	19.1
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									170.3	(178.1)
Intersegment Eliminations [Member]
Revenues:
Total revenues											0.0
Operating costs and expenses:
Selling, acquisition, operating and general expenses									(0.6)
Total operating costs and expenses									(0.6)
Operating income									0.6	0.0	0.0
Equity in net income of subsidiaries									(297.1)	(43.0)	232.4
Interest expense									(0.7)	(8.2)	(10.0)
Interest Income From Affiliates									(11.4)	12.2	29.6
Deconsolidation, Gain (Loss), Amount											0.0
Other (expense) income, net										2.3	(10.8)
Income (loss) from continuing operations before income taxes									(308.6)	(36.7)	241.2
Income tax expense									(8.5)	(27.3)	13.2
Net income (loss) from continuing operations									(300.1)	(9.4)	228.0
Less: Net income attributable to noncontrolling interest											0.0
Net income (loss) attributable to controlling interest									(300.1)	(9.4)	228.0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	0.0	0.0
Consolidated Entities
Revenues:
Net sales									5,007.4	5,039.7	4,733.1
Net investment income									1.1	8.9	20.7
Total revenues									5,008.5	5,048.6	4,753.8
Operating costs and expenses:
Cost of goods sold									3,132.6	3,119.8	3,050.9
Selling, acquisition, operating and general expenses									1,359.6	1,355.3	1,523.8
Total operating costs and expenses									4,492.2	4,475.1	4,574.7
Operating income									516.3	573.5	179.1
Equity in net income of subsidiaries											0.0
Interest expense									(360.1)	(402.5)	(407.8)
Interest Income From Affiliates											0.0
Deconsolidation, Gain (Loss), Amount											38.5
Other (expense) income, net									(5.0)	4.8	10.1
Income (loss) from continuing operations before income taxes									151.2	175.8	(180.1)
Income tax expense									48.3	31.6	39.6
Net income (loss) from continuing operations									273.2	(33.9)	(512.4)
Less: Net income attributable to noncontrolling interest									167.2	164.9	44.4
Net income (loss) attributable to controlling interest									106.0	(198.8)	(556.8)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									170.3	(178.1)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									102.9	144.2
HGI
Revenues:
Total revenues									0.0	0.0	0.0
Operating costs and expenses:
Operating income									(40.4)	(50.9)	(100.6)
Equity in net income of subsidiaries									497.8	(214.8)	(357.2)
Interest expense									(144.1)	(143.1)	(124.2)
Other (expense) income, net									1.3	2.0	15.2
Income (loss) from continuing operations before income taxes									314.6	(406.8)	(558.3)
Income tax expense									208.6	(208.0)	(1.5)
Net income (loss) from continuing operations									106.0	(198.8)	(556.8)
HGI | Discontinued Operations, Held-for-sale [Member]
Revenues:
Net sales											0.0
Net investment income											0.0
Total revenues											0.0
Operating costs and expenses:
Cost of goods sold											0.0
Selling, acquisition, operating and general expenses											0.0
Total operating costs and expenses											0.0
Operating income											0.0
Equity in net income of subsidiaries											0.0
Interest expense											0.0
Interest Income From Affiliates											0.0
Deconsolidation, Gain (Loss), Amount											0.0
Other (expense) income, net											0.0
Income (loss) from continuing operations before income taxes											0.0
Income tax expense											0.0
Net income (loss) from continuing operations											(292.7)
Less: Net income attributable to noncontrolling interest											22.0
Net income (loss) attributable to controlling interest									$ 126.6	$ (197.2)	(314.7)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest											(292.7)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest											$ 0.0