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Stock Compensation - Summary of Restricted Stock and Restricted Stock Units Outstanding and Related Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Mar. 31, 2015 | Jun. 30, 2015 | Jun. 30, 2014
HGI [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 22.2 |  |  | $ 22.2 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Granted |  |  |  | $ 30,500,000 | $ 46,600,000
Exercised / Released |  |  |  | $ 31,400,000 | $ 14,800,000
HGI [Member] | Restricted stock awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | (343) |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 11.44 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | 5,438 | 5,438 |
Granted |  | 10 |  | 1,885 | 3,313
Exercised / Released |  |  |  | 2,710 |
Restricted award outstanding at March 31, 2013 | 4,277 |  |  | 4,277 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | $ 9.75 | $ 9.75 |
Granted |  |  |  | 13.36 |
Exercised / Released |  |  |  | 8.92 |
Restricted award outstanding at March 31, 2013 | $ 11.74 |  |  | $ 11.74 |
HGI [Member] | Restricted stock units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted | 42 | 7 |  | 48 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | 0 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 | 48 |  | 7 | 7 |
Granted |  |  |  |  | 7
Exercised / Released |  |  |  | 7 |
Restricted award outstanding at March 31, 2013 |  |  | 48 |  |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | $ 11.84 | $ 11.84 |
Granted |  |  |  | $ 12.46 |
Exercised / Released |  |  | $ 12.46 |  |
HGI [Member] | Employee Stock Option [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted | 78 | 30 |  | 900 | 1,356
Shares: |  |  |  |  |
Restricted award expected to vest | 2,422 |  |  | 2,422 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award expected to vest | $ 4.12 |  |  | $ 4.12 |
FGL [Member] |  |  |  |  |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Granted |  |  |  | $ 9,500,000 | $ 13,400,000
FGL [Member] | Restricted stock awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | (18) |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 21.62 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | 172 | 172 |
Granted |  |  |  | 325 | 171
Exercised / Released |  |  |  | 227 |
Restricted award outstanding at March 31, 2013 | 252 |  |  | 252 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | $ 18.18 | $ 18.18 |
Granted |  |  |  | 23.57 |
Exercised / Released |  |  |  | 21.61 |
Restricted award outstanding at March 31, 2013 | $ 21.91 |  |  | $ 21.91 |
FGL [Member] | Performance Restricted Stock Unit (PRSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | (72) |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 17.00 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | 578 | 578 |
Granted |  |  |  | 40 | 541
Exercised / Released |  |  |  | 45 |
Restricted award outstanding at March 31, 2013 | 501 |  |  | 501 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | $ 17.37 | $ 17.37 |
Granted |  |  |  | 20.36 |
Exercised / Released |  |  |  | 17.00 |
Restricted award outstanding at March 31, 2013 | $ 17.69 |  |  | $ 17.69 |
FGL [Member] | Employee Stock Option [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted |  |  |  | 206 | 249
Shares: |  |  |  |  |
Restricted award expected to vest | 199 |  |  | 199 |
Spectrum Brands [Member] | Immediate Vest Restricted Stock Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  |  |  | 133 | 90
Spectrum Brands [Member] | Time Based Restricted Stock Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  |  |  | 141 | 60
Spectrum Brands [Member] | Performance-based and Time-based Shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  |  |  | 277 | 290
Spectrum Brands [Member] | Restricted stock units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 36.3 |  |  | $ 36.3 |
Stock Issued During Period, Value, Restricted Stock Award, Gross |  |  |  | $ 49.8 | $ 30.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | (29) |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 85.39 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 | 644 |  | 827 | 827 |
Granted |  | 10 |  | 551 | 440
Exercised / Released |  |  |  | 705 |
Restricted award outstanding at March 31, 2013 |  |  | 644 |  |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 |  |  | $ 67.66 | $ 67.66 |
Granted |  |  |  | 90.44 |
Exercised / Released |  |  |  | $ 68.29 |
Restricted award expected to vest |  |  | $ 85.65 |  |
Spectrum Brands [Member] | Employee Stock Option [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted | 22 |  |  | 551 |
Fidelity And Guaranty Life Holdings [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 12.6 |  |  | $ 12.6 |
Fidelity And Guaranty Life Holdings [Member] | Restricted stock units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period |  |  |  | (1) |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 49.45 |
Shares: |  |  |  |  |
Restricted award outstanding at September 30, 2012 | 11 |  | 26 | 26 |
Exercised / Released |  |  |  | 14 |
Restricted award outstanding at March 31, 2013 |  |  | 11 |  |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Restricted award outstanding at September 30, 2012 | $ 49.57 |  | $ 49.55 | $ 49.55 |
Granted |  |  |  | 0.00 |
Exercised / Released |  |  |  | $ 49.55 |
Restricted award outstanding at March 31, 2013 |  |  | $ 49.57 |  |
Fidelity And Guaranty Life Holdings [Member] | Employee Stock Option [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted |  |  |  | 0 |
Shares: |  |  |  |  |
Restricted award expected to vest | 25 |  |  | 25 |
Restricted stock units [Member] | HGI [Member] | Restricted stock awards [Member] |  |  |  |  |
Shares: |  |  |  |  |
Exercised / Released |  |  |  | 7 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Exercised / Released |  |  |  | $ 11.84 |
Restricted stock units [Member] | FGL [Member] | Restricted stock awards [Member] |  |  |  |  |
Shares: |  |  |  |  |
Exercised / Released |  |  |  | 0 |
Weighted Average Grant Date Fair Value (in dollars per share): |  |  |  |  |
Exercised / Released |  |  |  | $ 0.00 |
Minimum [Member] | Spectrum Brands [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms |  |  |  | 1 year |
Minimum [Member] | Spectrum Brands [Member] | Performance-based and Time-based Shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms |  |  |  | 1 year |
Maximum [Member] | Spectrum Brands [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms |  |  |  | 3 years |
Maximum [Member] | Spectrum Brands [Member] | Performance-based and Time-based Shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms |  |  |  | 2 years |

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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