Stock Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended												3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended								6 Months Ended									6 Months Ended			6 Months Ended						6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]	Mar. 31, 2014 Warrant [Member]	Mar. 31, 2014 HGI [Member]	Mar. 31, 2013 HGI [Member]	Mar. 31, 2014 HGI [Member] Minimum [Member]	Mar. 31, 2013 HGI [Member] Minimum [Member]	Mar. 31, 2014 HGI [Member] Maximum [Member]	Mar. 31, 2013 HGI [Member] Maximum [Member]	Mar. 31, 2013 HGI [Member] Stock option awards [Member]	Mar. 31, 2014 HGI [Member] Stock option awards [Member]	Mar. 31, 2013 HGI [Member] Stock option awards [Member]	Mar. 31, 2013 HGI [Member] Restricted stock awards [Member]	Mar. 31, 2014 HGI [Member] Restricted stock awards [Member]	Mar. 31, 2013 HGI [Member] Restricted stock awards [Member]	Sep. 30, 2013 HGI [Member] Restricted stock awards [Member]	Mar. 31, 2013 HGI [Member] Restricted stock units [Member]	Mar. 31, 2013 HGI [Member] Restricted stock units [Member]	Mar. 31, 2014 HGI [Member] Restricted stock units [Member]	Mar. 31, 2014 Spectrum Brands [Member]	Mar. 31, 2013 Spectrum Brands [Member]	Mar. 31, 2014 Spectrum Brands [Member]	Mar. 31, 2013 Spectrum Brands [Member]	Mar. 31, 2013 Spectrum Brands [Member] Minimum [Member]	Mar. 31, 2013 Spectrum Brands [Member] Time Based Restricted Stock Units Vesting Over One Year [Member]	Mar. 31, 2013 Spectrum Brands [Member] Performance Based and Time Based Restricted Stock Units Two Year Vesting [Member]	Mar. 31, 2014 Spectrum Brands [Member] Restricted stock units [Member]	Mar. 31, 2013 Spectrum Brands [Member] Restricted stock units [Member]	Sep. 30, 2013 Spectrum Brands [Member] Restricted stock units [Member]	Mar. 31, 2014 Spectrum Brands [Member] Immediate Vest Restricted Stock Units [Member]	Mar. 31, 2014 Spectrum Brands [Member] Time Based Restricted Stock Units [Member]	Mar. 31, 2013 Spectrum Brands [Member] Time Based Restricted Stock Units [Member]	Mar. 31, 2014 Spectrum Brands [Member] Performance-based and Time-based Shares [Member]	Mar. 31, 2013 Spectrum Brands [Member] Performance-based and Time-based Shares [Member] Minimum [Member]	Mar. 31, 2014 FGL [Member]	Mar. 31, 2014 FGL [Member] Maximum [Member]	Mar. 31, 2014 FGL [Member] Performance Restricted Stock Unit (PRSUs) [Member]	Sep. 30, 2013 FGL [Member] Performance Restricted Stock Unit (PRSUs) [Member]	Mar. 31, 2014 FGL [Member] Stock option awards [Member]	Mar. 31, 2014 FGL [Member] Restricted stock awards [Member]	Sep. 30, 2013 FGL [Member] Restricted stock awards [Member]	Mar. 31, 2014 FGL [Member] Common Stock [Member]	Mar. 31, 2014 FGL [Member]	Mar. 31, 2013 FGL [Member]	Mar. 31, 2014 FGL [Member] Stock option awards [Member]	Mar. 31, 2014 FGL [Member] Restricted stock units [Member]	Sep. 30, 2013 FGL [Member] Restricted stock units [Member]	Mar. 31, 2014 Restricted stock awards [Member]	Mar. 31, 2014 Stock option awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted award vested and exercisable at March 31, 2013																								$ 4.61
Document Fiscal Year Focus			2014
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term										5 years 3 months 18 days	5 years 3 months 18 days		6 years 0 months 0 days	6 years 0 months 0 days																										4 years 6 months								4 years 6 months	4 years 6 months
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																																																					2,359,000	1,302,000
Stock-based compensation	$ 24.0	$ 15.7	$ 47.4	$ 22.2
Options, granted															30,000	1,326,000	1,528,000																											249,000						0
Vesting period					1 year	7 months	36 months																																		3 years
Equity intruments other than options granted																		29,000	3,302,000	3,256,000		9,000	9,000							90,000	524,000	436,000	614,000									541,000			171,000
Equity instruments other than options, grant date fair value																																30.1	28.6
Time-based and vest over period of restricted stock units																													1 year										2 years
Compensation cost not yet recognized									29.9																																							19.5
Unrecognized compensation cost expected to recognized, years									1 year 9 months 25 days																															2 years 1 month 6 days								2 years 1 month 6 days
Weighted average remaining contractual term of outstanding stock option awards									8 years 8 months 9 days
Stock Issued During Period, Shares, Restricted Stock Award, Gross																									22,000	62,000	436,000	636,000							90,000	53,000	22,000	293,000
Granted									$ 46,100,000.00	$ 33,200,000.00									$ 12.00													$ 69.00								$ 13,400,000.00		$ 17.37			$ 18.11		$ 1,000,000.00				$ 0.00
Deferred Compensation Arrangement with Individual, Shares Issued								3,000,000
Vested			$ 14,300,000.00																$ 10.15													$ 39.62													$ 0.00						$ 49.45
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			3.6
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options			2.5
Volatility											41.22%	42.80%	0.00%	44.00%																										25.00%								25.00%	27.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number																			5,606,000		3,456,000			22,000								605,000		1,118,000								541,000	0		168,000	0	58,000				30,000	46,000
Deferred Compensation Arrangement with Individual, Exercise Price								$ 13.13
Deferred Compensation Arrangement with Individual, Requisite Service Period								P4Y
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued								$ 11.9