Consolidating Financial Information - Schedule of Income Statement Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Net consumer product sales	$ 1,137.8	$ 1,089.8	$ 987.7	$ 870.3	$ 832.6	$ 824.8	$ 746.2	$ 848.8	$ 4,085.6	$ 3,252.4	$ 3,186.9
Oil and natural gas									90.2
Insurance premiums									58.8	55.3	39.0
Net investment income									734.7	722.7	369.8
Net investment gains (losses)									511.6	410.0	(166.9)
Insurance and investment product fees and other									62.5	40.3	48.9
Total revenues									5,543.4	4,480.7	3,477.7	[1]
Operating costs and expenses:
Consumer products cost of goods sold									2,695.3	2,136.8	2,058.0
Oil and natural gas direct operating costs									44.0
Benefits and other changes in policy reserves									531.8	777.4	247.6
Selling, acquisition, operating and general expenses									1,220.5	932.7	961.8
Impairment of oil and natural gas properties									54.3	0	0
Amortization of intangibles									260.1	224.3	46.6
Total operating costs and expenses									4,806.0	4,071.2	3,314.0
Operating income	205.4	182.6	134.0	215.4	120.3	81.4	96.0	111.8	737.4	409.5	163.7
Interest expense									(511.9)	(251.0)	(249.3)
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock									(101.6)	(156.6)	27.9
Bargain purchase gain from business acquisition									0	0	158.3
Gain on contingent purchase price reduction									0	41.0	0
Other expense, net									(5.6)	(17.5)	(42.7)
Income from continuing operations before income taxes									118.3	25.4	57.9
Income tax expense (benefit)									187.3	(85.3)	50.6
Net (loss) income									(69.0)	110.7	7.3
Less: Net (loss) income attributable to noncontrolling interest									(23.2)	21.2	(34.7)
Net (loss) income attributable to controlling interest									(45.8)	89.5	42.0
Less: Preferred stock dividends and accretion									48.4	59.6	19.8
Net (loss) income attributable to common and participating preferred stockholders	(202.3)	91.6	(45.5)	62.0	159.1	(149.1)	(3.9)	23.8	(94.2)	29.9	22.2
Consumer Products Segment
Revenues:
Net consumer product sales									4,085.6	3,252.4	3,186.9
Oil and natural gas
Insurance premiums
Net investment income
Net investment gains (losses)
Insurance and investment product fees and other
Total revenues									4,085.6	3,252.4	3,186.9
Operating costs and expenses:
Consumer products cost of goods sold									2,695.3	2,136.8	2,058.0
Oil and natural gas direct operating costs
Benefits and other changes in policy reserves
Selling, acquisition, operating and general expenses									961.3	750.1	843.3
Impairment of oil and natural gas properties
Amortization of intangibles									77.8	63.7	57.7
Total operating costs and expenses									3,734.4	2,950.6	2,959.0
Operating income									351.2	301.8	227.9
Equity in net income (losses) of subsidiaries											0
Interest expense									(375.6)		(208.4)
Affiliated interest expense										(191.9)	0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock											0
Bargain purchase gain from business acquisition											0
Gain on contingent purchase price reduction
Other expense, net									(3.5)	(0.9)	(2.4)
Income from continuing operations before income taxes									(27.9)	109.0	17.1
Income tax expense (benefit)									27.4	60.4	92.3
Net (loss) income									(55.3)	48.6	(75.2)
Less: Net (loss) income attributable to noncontrolling interest									(23.6)	21.2	(34.7)
Net (loss) income attributable to controlling interest									(31.7)	27.4	(40.5)
Less: Preferred stock dividends and accretion											0
Net (loss) income attributable to common and participating preferred stockholders									(31.7)	27.4	(40.5)
Insurance
Revenues:
Net consumer product sales
Oil and natural gas
Insurance premiums									58.8	55.3	39.0
Net investment income									715.5	716.2	369.8
Net investment gains (losses)									511.6	410.0	(166.9)
Insurance and investment product fees and other									62.5	40.3	48.9
Total revenues									1,348.4	1,221.8	290.8
Operating costs and expenses:
Consumer products cost of goods sold
Oil and natural gas direct operating costs
Benefits and other changes in policy reserves									531.8	777.4	247.6
Selling, acquisition, operating and general expenses									111.4	123.9	95.8
Impairment of oil and natural gas properties
Amortization of intangibles									182.3	160.6	(11.1)
Total operating costs and expenses									825.5	1,061.9	332.3
Operating income									522.9	159.9	(41.5)
Equity in net income (losses) of subsidiaries											0
Interest expense									(11.5)		(1.9)
Affiliated interest expense										(2.5)	0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock											0
Bargain purchase gain from business acquisition											158.3
Gain on contingent purchase price reduction										41.0
Other expense, net									(0.2)	0.1	0
Income from continuing operations before income taxes									511.2	198.5	114.9
Income tax expense (benefit)									161.0	(145.7)	(41.7)
Net (loss) income									350.2	344.2	156.6
Less: Net (loss) income attributable to noncontrolling interest											0
Net (loss) income attributable to controlling interest									350.2	344.2	156.6
Less: Preferred stock dividends and accretion											0
Net (loss) income attributable to common and participating preferred stockholders									350.2	344.2	156.6
Energy Segment
Revenues:
Net consumer product sales
Oil and natural gas									90.2
Insurance premiums
Net investment income
Net investment gains (losses)
Insurance and investment product fees and other
Total revenues									90.2	0	0
Operating costs and expenses:
Consumer products cost of goods sold
Oil and natural gas direct operating costs									44.0
Benefits and other changes in policy reserves
Selling, acquisition, operating and general expenses									37.1
Impairment of oil and natural gas properties									54.3
Amortization of intangibles
Total operating costs and expenses									135.4
Operating income									(45.2)	0	0
Equity in net income (losses) of subsidiaries											0
Interest expense									(4.7)		0
Affiliated interest expense									(5.6)		0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock											0
Bargain purchase gain from business acquisition											0
Gain on contingent purchase price reduction
Other expense, net									(1.3)		0
Income from continuing operations before income taxes									(56.8)		0
Income tax expense (benefit)											0
Net (loss) income									(56.8)		0
Less: Net (loss) income attributable to noncontrolling interest											0
Net (loss) income attributable to controlling interest									(56.8)		0
Less: Preferred stock dividends and accretion											0
Net (loss) income attributable to common and participating preferred stockholders									(56.8)		0
Other Financial Services
Revenues:
Net consumer product sales
Oil and natural gas
Insurance premiums
Net investment income									28.9	8.6
Net investment gains (losses)
Insurance and investment product fees and other
Total revenues									28.9	8.6
Operating costs and expenses:
Consumer products cost of goods sold
Oil and natural gas direct operating costs
Benefits and other changes in policy reserves
Selling, acquisition, operating and general expenses									18.5	6.1
Impairment of oil and natural gas properties
Amortization of intangibles
Total operating costs and expenses									18.5	6.1
Operating income									10.4	2.5	0
Equity in net income (losses) of subsidiaries										(2.1)	0
Interest expense											0
Affiliated interest expense									(4.1)		0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock											0
Bargain purchase gain from business acquisition											0
Gain on contingent purchase price reduction
Other expense, net											0
Income from continuing operations before income taxes									6.3	0.4	0
Income tax expense (benefit)									0.1		0
Net (loss) income									6.2	0.4	0
Less: Net (loss) income attributable to noncontrolling interest									0.4		0
Net (loss) income attributable to controlling interest									5.8	0.4	0
Less: Preferred stock dividends and accretion											0
Net (loss) income attributable to common and participating preferred stockholders									5.8	0.4	0
Corporate and Other
Revenues:
Net consumer product sales
Oil and natural gas
Insurance premiums
Net investment income
Net investment gains (losses)
Insurance and investment product fees and other
Total revenues
Operating costs and expenses:
Consumer products cost of goods sold
Oil and natural gas direct operating costs
Benefits and other changes in policy reserves
Selling, acquisition, operating and general expenses									91.0	52.6	22.7
Impairment of oil and natural gas properties
Amortization of intangibles
Total operating costs and expenses									91.0	52.6	22.7
Operating income									(91.0)	(52.6)	(22.7)
Equity in net income (losses) of subsidiaries									266.3		116.1
Interest expense									(120.1)	372.0	(39.0)
Affiliated interest expense										(56.6)	0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock									(101.6)	(156.6)	27.9
Bargain purchase gain from business acquisition											0
Gain on contingent purchase price reduction
Other expense, net									(0.6)	(16.7)	(40.3)
Income from continuing operations before income taxes									(47.0)	89.5	42.0
Income tax expense (benefit)									(1.2)		0
Net (loss) income									(45.8)	89.5	42.0
Less: Net (loss) income attributable to noncontrolling interest											0
Net (loss) income attributable to controlling interest									(45.8)	89.5	42.0
Less: Preferred stock dividends and accretion									48.4	59.6	19.8
Net (loss) income attributable to common and participating preferred stockholders									(94.2)	29.9	22.2
Intersegment elimination
Revenues:
Net consumer product sales
Oil and natural gas
Insurance premiums
Net investment income									(9.7)	(2.1)
Net investment gains (losses)
Insurance and investment product fees and other
Total revenues									(9.7)	(2.1)	0
Operating costs and expenses:
Consumer products cost of goods sold
Oil and natural gas direct operating costs
Benefits and other changes in policy reserves
Selling, acquisition, operating and general expenses									1.2
Impairment of oil and natural gas properties
Amortization of intangibles
Total operating costs and expenses									1.2
Operating income									(10.9)	(2.1)	0
Equity in net income (losses) of subsidiaries									(266.3)	2.1	(116.1)
Interest expense										(372.0)	0
Affiliated interest expense									9.7		0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock											0
Bargain purchase gain from business acquisition											0
Gain on contingent purchase price reduction
Other expense, net											0
Income from continuing operations before income taxes									(267.5)	(372.0)	(116.1)
Income tax expense (benefit)											0
Net (loss) income									(267.5)	(372.0)	(116.1)
Less: Net (loss) income attributable to noncontrolling interest											0
Net (loss) income attributable to controlling interest									(267.5)	(372.0)	(116.1)
Less: Preferred stock dividends and accretion											0
Net (loss) income attributable to common and participating preferred stockholders									(267.5)	(372.0)	(116.1)
Consolidated Entities
Revenues:
Net consumer product sales									4,085.6	3,252.4	3,186.9
Oil and natural gas									90.2
Insurance premiums									58.8	55.3	39.0
Net investment income									734.7	722.7	369.8
Net investment gains (losses)									511.6	410.0	(166.9)
Insurance and investment product fees and other									62.5	40.3	48.9
Total revenues									5,543.4	4,480.7	3,477.7
Operating costs and expenses:
Consumer products cost of goods sold									2,695.3	2,136.8	2,058.0
Oil and natural gas direct operating costs									44.0
Benefits and other changes in policy reserves									531.8	777.4	247.6
Selling, acquisition, operating and general expenses									1,220.5	932.7	961.8
Impairment of oil and natural gas properties									54.3
Amortization of intangibles									260.1	224.3	46.6
Total operating costs and expenses									4,806.0	4,071.2	3,314.0
Operating income									737.4	409.5	163.7
Equity in net income (losses) of subsidiaries											0
Interest expense									(511.9)		(249.3)
Affiliated interest expense										(251.0)	0
(Loss) gain from the change in the fair value of the equity conversion feature of preferred stock									(101.6)	(156.6)	27.9
Bargain purchase gain from business acquisition											158.3
Gain on contingent purchase price reduction										41.0
Other expense, net									(5.6)	(17.5)	(42.7)
Income from continuing operations before income taxes									118.3	25.4	57.9
Income tax expense (benefit)									187.3	(85.3)	50.6
Net (loss) income									(69.0)	110.7	7.3
Less: Net (loss) income attributable to noncontrolling interest									(23.2)	21.2	(34.7)
Net (loss) income attributable to controlling interest									(45.8)	89.5	42.0
Less: Preferred stock dividends and accretion									48.4	59.6	19.8
Net (loss) income attributable to common and participating preferred stockholders									$ (94.2)	$ 29.9	$ 22.2

[1] Reported revenues and net income for Fiscal 2011 include the actual reported results of FGH for the approximate six month period subsequent to April 6, 2011. Reported net income also includes the $158.3 non-recurring bargain purchase gain which was recorded as of the FGL Acquisition Date, and reflects the retrospective measurement period adjustments disclosed above.