Segment Data - Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2016
Segment Reporting Information [Line Items]
Document Fiscal Year Focus	2017
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	$ 7.9	$ (221.3)
Revenues:
Consolidated revenues	1,189.6	1,209.4
Operating income (loss):
Consolidated operating income	117.7	99.8
Interest expense	(91.7)	(95.2)
Other income (expense), net	1.4	(0.7)
(Loss) income from continuing operations before income taxes	27.4	3.9
Total assets:
Consolidated total assets	35,662.7		$ 35,792.8
Total cash provided from operating activities:
Consolidated cash provided from operating activities	80.7	(88.9)
Income tax expense (benefit)	25.4	(5.6)
Net income	260.8	7.0
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	2.0	9.5
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	258.8	(2.5)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(2.5)
Net Income (Loss) Attributable to Parent	212.2	(33.9)
Less: Net income attributable to noncontrolling interest	48.6	40.9
Total segments [Member]
Revenues:
Consolidated revenues	1,189.3	1,203.4
Operating income (loss):
Consolidated operating income	137.9	123.5
Intersegment Eliminations [Member]
Revenues:
Consolidated revenues	6.2	(5.4)
Operating income (loss):
Consolidated operating income	2.3	(19.0)
Interest expense		(1.1)
Other income (expense), net		(0.2)
(Loss) income from continuing operations before income taxes	(259.7)	(35.5)
Total cash provided from operating activities:
Income tax expense (benefit)	4.1	(3.7)
Net income	(263.8)	(31.8)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0.0	0.0
Net Income (Loss) Attributable to Parent	(263.8)	(31.8)
Insurance Segment [Member]
Revenues:
Consolidated revenues	(28.7)	(10.0)
Operating income (loss):
Consolidated operating income	(15.4)	0.0
(Loss) income from continuing operations before income taxes	(15.4)
Total assets:
Consolidated total assets	1,780.4		1,824.9
Total cash provided from operating activities:
Income tax expense (benefit)	(3.8)	(1.3)
Net income	(11.6)	1.3
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0.0	0.0
Net Income (Loss) Attributable to Parent	(11.6)	1.3
Consumer Products Segment [Member]
Revenues:
Consolidated revenues	1,211.8	1,218.8
Operating income (loss):
Consolidated operating income	151.0	142.5
Interest expense	(55.8)	(58.4)
Other income (expense), net	1.1	(3.5)
(Loss) income from continuing operations before income taxes	96.3	80.6
Total assets:
Consolidated total assets	6,954.5		7,069.1
Total cash provided from operating activities:
Income tax expense (benefit)	31.1	6.9
Net income	65.2	73.7
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0.0	0.0
Net Income (Loss) Attributable to Parent	37.7	42.6
Less: Net income attributable to noncontrolling interest	27.5	31.1
Corporate expenses [Member]
Revenues:
Consolidated revenues	0.3	6.0
Operating income (loss):
Consolidated operating income	(20.2)	(23.7)
Interest expense	(35.9)	(35.7)
Other income (expense), net	0.3	3.0
(Loss) income from continuing operations before income taxes	206.2	(41.2)
Total assets:
Consolidated total assets	2,549.2		$ 2,632.0
Total cash provided from operating activities:
Income tax expense (benefit)	(6.0)	(7.5)
Net income	212.2	(33.7)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0.0	0.0
Net Income (Loss) Attributable to Parent	$ 212.2	(33.9)
Less: Net income attributable to noncontrolling interest		$ 0.2