Stock Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended												12 Months Ended															6 Months Ended		12 Months Ended				6 Months Ended	12 Months Ended		6 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended																							12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Minimum	Sep. 30, 2013 Minimum	Sep. 30, 2012 Minimum	Sep. 30, 2013 Maximum	Sep. 30, 2012 Maximum	Sep. 30, 2014 HGI's executive bonus plan Minimum	Sep. 30, 2014 HGI's executive bonus plan Maximum	Sep. 30, 2014 Employee Stock Option HGI's executive bonus plan	Sep. 30, 2014 Restricted stock awards HGI's executive bonus plan	Sep. 30, 2014 HGI	Sep. 30, 2013 HGI	Sep. 30, 2012 HGI	Sep. 30, 2014 HGI Stock option awards	Sep. 30, 2014 HGI Employee Stock Option	Sep. 30, 2013 HGI Employee Stock Option	Sep. 30, 2012 HGI Employee Stock Option	Sep. 30, 2014 HGI Restricted stock awards	Sep. 30, 2013 HGI Restricted stock awards	Sep. 30, 2012 HGI Restricted stock awards	Sep. 30, 2014 HGI Restricted stock units	Sep. 30, 2013 HGI Restricted stock units	Sep. 30, 2012 HGI Restricted stock units	Sep. 30, 2014 HGI Warrant [Member]	Sep. 30, 2014 FGLH	Mar. 31, 2013 FGLH Stock option awards	Mar. 31, 2012 FGLH Stock option awards	Sep. 30, 2014 FGLH Stock option awards	Sep. 30, 2013 FGLH Stock option awards	Sep. 30, 2012 FGLH Stock option awards	Sep. 30, 2014 FGLH Employee Stock Option	Mar. 31, 2013 FGLH Restricted stock awards	Sep. 30, 2014 FGLH Restricted stock units	Sep. 30, 2014 FGL Maximum	Mar. 31, 2013 FGL Performance Restricted Stock Unit (PRSUs) [Member]	Sep. 30, 2014 FGL Performance Restricted Stock Unit (PRSUs) [Member]	Sep. 30, 2014 FGL Employee Stock Option	Sep. 30, 2014 FGL Restricted stock awards	Mar. 31, 2014 Compass Compass Incentive Plan	Sep. 30, 2014 Compass Compass Incentive Plan	Mar. 31, 2012 Spectrum Brands	Sep. 30, 2014 Spectrum Brands	Sep. 30, 2013 Spectrum Brands	Sep. 30, 2014 Spectrum Brands Minimum	Sep. 30, 2013 Spectrum Brands Minimum	Sep. 30, 2012 Spectrum Brands Minimum	Sep. 30, 2012 Spectrum Brands Maximum	Sep. 30, 2013 Spectrum Brands Service Based Vesting [Member] Minimum	Sep. 30, 2014 Spectrum Brands Immediate Vest Restricted Stock Units [Member]	Sep. 30, 2014 Spectrum Brands Restricted stock units	Sep. 30, 2013 Spectrum Brands Restricted stock units	Sep. 30, 2012 Spectrum Brands Restricted stock units	Sep. 30, 2014 Spectrum Brands Time Based Restricted Stock Units Vesting From One Year To Two Year	Sep. 30, 2013 Spectrum Brands Time Based Restricted Stock Units Vesting From One Year To Two Year	Sep. 30, 2012 Spectrum Brands Time Based Restricted Stock Units Vesting From One Year To Two Year	Sep. 30, 2014 Spectrum Brands Performance-based and Time-based Shares	Sep. 30, 2013 Spectrum Brands Performance-based and Time-based Shares	Sep. 30, 2012 Spectrum Brands Performance-based and Time-based Shares	Sep. 30, 2013 Spectrum Brands Performance Shares [Member]	Sep. 30, 2013 Spectrum Brands Performance Based Vesting [Member]	Sep. 30, 2013 Spectrum Brands Performance Based Vesting [Member] Minimum	Sep. 30, 2014 2011 HGI Plan, as amended [Member]	Sep. 30, 2014 2011 HGI Plan, as amended [Member] Maximum	Sep. 30, 2014 2014 HGI Warrant Plan [Member] Maximum	Sep. 30, 2014 2014 HGI Warrant Plan [Member] Warrant [Member]	Sep. 30, 2014 Spectrum 2009 Plan [Member] Maximum	Sep. 30, 2014 Russel Hobbs 2007 Plan [Member] Maximum	Sep. 30, 2014 Spectrum Brands 2011 Plan [Member]	Sep. 30, 2014 Spectrum Brands 2011 Plan [Member] Maximum	Sep. 30, 2014 Deferred Bonus [Member] HGI's executive bonus plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	$ 91.1	$ 61.5	$ 31.2										$ 27.0	$ 11.7	$ 1.9
Common Stock, Capital Shares Reserved for Future Issuance													11,557,000
Options, granted																	1,356,000	1,734,000	2,275,000				7,000			3,000,000		207,000			195,000		0						249,000
Equity intruments other than options granted																				3,325,000	3,319,000	838,000		9,000	22,000												53,000	578,000		179,000	83,000	323,000										669,000
Vesting period					1 month	4 months	4 years	4 years	12 months	36 months																				3 years	3 years	3 years				3 years
Granted													$ 46,700,000.00	$ 34,600,000.00	$ 0					$ 12.00			$ 11.84			$ 0									$ 0.00			$ 17.37		$ 18.25		$ 7.90										$ 75.50
Exercised / Released	$ 15,200,000.00	$ 0																		$ 10.18			$ 4.61												$ 49.53					$ 0.00		$ 7.88										$ 39.69
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	3.6	0.1
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	2.8	0
Granted																	$ 11.75									$ 13.125							$ 0.00						$ 17.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares																																																																			600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized											1,100,000	2,500,000																														1,000,000																							17,000,000	3,000,000		3,000,000	1,000,000		6,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Additional Amount																																																																7,000,000						1,000,000
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount																																																																								35.0
Compensation cost not yet recognized													25.6														16.3
Unrecognized compensation cost expected to recognized, years													1 year 8 months 12 days														1 year 9 months 18 days
Weighted average remaining contractual term of outstanding stock option awards																8 years 2 months 8 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																																										647,000
Stock compensation, shares, restricted stock																																											863,000	669,000	700,000						203,000				143,000	48,000	160,000	323,000	562,000	703,000	652,000	90,000
Equity instruments other than options, grant date fair value																																																				50.5	32.2	0
Time-based and vest over period of restricted stock units				2 years																																										1 year	1 year	1 year	2 years	1 year													1 year
Grant date fair value																													$ 0.8	$ 14.2	$ 2.0			$ 0