Segment Data - Segment Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			15 Months Ended
	Jun. 30, 2013		Jun. 30, 2013	Jul. 01, 2012		Jul. 01, 2013		Sep. 30, 2012
Revenues:
Consolidated revenues	$ 1,410.6		$ 4,044.8	$ 3,283.9		$ 1,012.2
Operating income (loss):
Consolidated operating income	182.6		532.0	289.2		81.5
Interest expense	(83.9)		(302.7)	(194.4)		(54.4)
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock	52.6		81.9	(124.0)		(125.5)
Gain on contingent purchase price reduction				41.0
Other income (expense), net	4.2		(7.7)	(26.0)		(17.5)
Income (loss) from continuing operations before income taxes	155.5		303.5	(14.2)		(115.9)
Total assets:
Consolidated total assets	27,365.0		27,365.0					25,200.4
Total cash provided from operating activities:
Cash used in corporate operating activities			(84.7)	77.7
Consolidated cash provided from operating activities			94.0	204.7
Consumer Products [Member]
Revenues:
Consolidated revenues	1,089.8		2,947.8	2,419.9		824.8
Operating income (loss):
Consolidated operating income	115.7		236.1	234.2		95.2
Interest expense			(191.8)
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock
Gain on contingent purchase price reduction
Other income (expense), net			(7.9)	(2.2)
Income (loss) from continuing operations before income taxes			36.4	81.9
Total assets:
Consolidated total assets	5,537.5		5,537.5					3,751.6
Total cash provided from operating activities:
Total cash provided from segment operating activities			(75.6)	(61.9)
Insurance [Member]
Revenues:
Consolidated revenues	276.0		1,022.3	862.6		186.3
Operating income (loss):
Consolidated operating income	78.5		351.5	89.5		(1.5)
Interest expense			(5.9)
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock
Gain on contingent purchase price reduction				41.0
Other income (expense), net			0.2
Income (loss) from continuing operations before income taxes			349.2	128.6
Total assets:
Consolidated total assets	21,012.6		21,012.6					20,990.3
Total cash provided from operating activities:
Total cash provided from segment operating activities			230.9	187.4
Energy Segment [Member]
Revenues:
Consolidated revenues	37.8		54.5
Operating income (loss):
Consolidated operating income	4.8		5.3
Interest expense			(2.8)
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock
Gain on contingent purchase price reduction
Other income (expense), net			0.8
Income (loss) from continuing operations before income taxes			(0.1)
Total assets:
Consolidated total assets	685.5		685.5
Total cash provided from operating activities:
Total cash provided from segment operating activities			20.8	0
Other Financial Services [Member]
Revenues:
Consolidated revenues	10.2		29.5	2.1		1.7
Operating income (loss):
Consolidated operating income	4.1		16.6	(0.5)		0.5
Interest expense
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock
Gain on contingent purchase price reduction
Other income (expense), net			(0.9)
Income (loss) from continuing operations before income taxes			9.1	(1.2)
Total assets:
Consolidated total assets	316.9		316.9					195.1
Total cash provided from operating activities:
Total cash provided from segment operating activities			2.6	1.5
Total segments [Member]
Operating income (loss):
Consolidated operating income	200.1		600.2	322.5		93.6
Total assets:
Consolidated total assets	27,212.1		27,212.1					24,754.9
Total cash provided from operating activities:
Total cash provided from segment operating activities			178.7	127.0
Intersegment elimination [Member]
Revenues:
Consolidated revenues	(3.2)		(9.3)	(0.7)		(0.6)
Operating income (loss):
Consolidated operating income	(3.0)		(9.3)	(0.7)		(0.6)
Interest expense				(139.9)
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock
Gain on contingent purchase price reduction
Other income (expense), net
Income (loss) from continuing operations before income taxes			(238.2)	(139.9)
Total assets:
Consolidated total assets	(340.4)		(340.4)					(182.1)
Corporate expenses [Member]
Revenues:
Consolidated revenues
Operating income (loss):
Consolidated operating income	(17.5)	[1]	(68.2)	(33.3)	[1]	(12.1)	[1]
Interest expense			(102.2)	139.9
Gain (loss) from the change in the fair value of the equity conversion feature of preferred stock			81.9	(124.0)
Gain on contingent purchase price reduction
Other income (expense), net			0.1	(23.8)
Income (loss) from continuing operations before income taxes			147.1	(83.6)
Total assets:
Consolidated total assets	2,241.5		2,241.5					2,303.7
Total cash provided from operating activities:
Start-up costs	0		0.9	1.7		0.9
Acquisition related cost	0.9		12.0	6.9		0.3
Corporate assets [Member]
Total assets:
Consolidated total assets	$ 152.9		$ 152.9					$ 445.5

[1] Included in corporate expenses for the three and nine months ended June 30, 2013 and July 1, 2012, are $0.0 and $0.9, and $0.9 and $1.7, respectively, for start-up costs relating to Front Street and Salus, and $0.9 and $12.0, and $0.3 and $6.9, respectively, relating to acquisitions and other projects.