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Description of Business, Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Detail) - Range [Domain] $ in Millions |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 28, 2015 USD ($) | Nov. 03, 2014 USD ($) | Oct. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2015 USD ($) | Jun. 30, 2015 USD ($) Segment | Jun. 30, 2014 USD ($) | May. 21, 2015 USD ($) | May. 19, 2015 USD ($) | Apr. 14, 2015 USD ($) | Jan. 16, 2015 USD ($) | Dec. 31, 2014 USD ($) | Oct. 06, 2014 | Oct. 01, 2014 USD ($) | Sep. 30, 2014 USD ($) | Apr. 06, 2011 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Preferred stock dividends and accretion |  |  |  |  | $ 49.3 |  |  | $ 73.6 |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 6,860.3 |  |  | $ 6,860.3 |  |  |  |  |  |  |  |  | $ 5,194.5 |
Goodwill |  |  |  | 2,498.7 |  |  | 2,498.7 |  |  |  |  |  |  |  |  | 1,524.8 |
Asset-based loans |  |  |  | $ 490.0 |  |  | $ 490.0 |  |  |  |  |  |  |  |  | $ 811.6 |
Number of reporting segments |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |
Compass Production Partners [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales of Oil and Gas Prospects |  |  |  |  |  |  | $ 19.2 |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  | $ 118.8 |  |  | $ 118.8 |  |  |  |  |  |  |  |  |  |  |
Spectrum Brands [Member] | Six Point One Two Five Percentage Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  | 6.125% |  | 6.125% | 6.125% |  |  |  |  |  |  |  |  | 0.00% |
Long-term debt |  |  |  | $ 250.0 |  |  | $ 250.0 |  |  |  |  |  |  |  |  | $ 0.0 |
Spectrum Brands [Member] | Six Point Seven Five Percentage Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  | 6.75% |  |  | 6.75% |  |  |  |  |  |  |  |  |  |
Spectrum Brands [Member] | Five Point Seven Five Percentage Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  | 5.75% |  |  | 5.75% |  |  |  |  |  |  |  |  | 0.00% |
Long-term debt |  |  |  | $ 1,000.0 |  |  | $ 1,000.0 |  |  |  |  |  |  |  |  | $ 0.0 |
FOH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deconsolidation, Gain (Loss), Amount |  |  |  |  |  |  | 38.5 |  |  |  |  |  |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  |  |  | $ 16.3 |  |  | $ 16.3 |  |  |  |  |  |  |  |  |  |
HGI [Member] | 7.875% Senior Secured Notes, due July 15, 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  | 7.875% |  |  | 7.875% |  |  | 7.875% |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  |  |  | 104.50% | 104.50% |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  | $ 160.0 | $ 100.0 |  |  |  |  |  |
HGI [Member] | Seven Point Seven Five Percent Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  | 7.75% |  |  | 7.75% |  |  | 7.75% |  |  |  |  |  | 7.80% |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  |  |  | 98.51% |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 890.0 |  |  | $ 890.0 |  |  | $ 140.0 |  |  |  |  |  | $ 750.0 |
Tell Manufacturing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30.3 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.5 |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ 115.7 |  | $ 7.1 |  |
Compass Production Partners [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Percentage Of Equity Interests Acquired |  |  | 99.80% |  |  |  |  |  |  |  |  |  |  | 25.50% |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest |  |  | $ 465.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ability Re [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 19.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 17.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
European IAMS and Eukanuba [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | 40.5 |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.5 |  |  |  |
Salix Animal Health LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  | $ 148.3 |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  | 58.5 |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 70.1 |  |  |  |  |
AAG Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  | $ 931.4 |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  | 931.4 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  | 429.0 |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | 1,400.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 965.7 |  |  |  |  |  |  |  |
Spectrum Brands [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Percentage Of Equity Interests Acquired |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |
Fidelity And Guaranty Life Holdings [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Fair Value Of Contingent Purchase Price Consideration Reduction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50.0
Severance Cost, one time payments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  | 20.5 |  |  |  |  |  |  |  |  |  |
Severance Cost, Accrued Bonus [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  | 16.5 |  |  |  |  |  |  |  |  |  |
Severance Cost, Future Bonus [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  | 3.3 |  |  |  |  |  |  |  |  |  |
Euro Member Countries, Euro | Spectrum Brands [Member] | Euro Term Loan, Due December 19, 2021 [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 150.0 |  |  | 150.0 |  |  |  |  |  |  |  |  |  |
Common Stock [Member] | Spectrum Brands [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 575.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
OMGUK CARVM financing fee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  |  |  |  | 61.6 |  |  |  |  |  |  |  |  |  |
Legal Fees |  |  |  |  |  |  | $ 7.6 |  |  |  |  |  |  |  |  |  |

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