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Description of Business, Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 01, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Nov. 08, 2015 | Sep. 30, 2015
Business Acquisition [Line Items] |  |  |  |  |
Gain (Loss) on Disposition of Oil and Gas Property |  | $ 105.6 | $ 0.0 |  |
Long-term debt |  | 6,410.9 |  |  | $ 6,439.1
Goodwill |  | 2,478.1 |  |  | 2,487.4
Compass Production Partners [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Proceeds from Sale of Oil and Gas Property and Equipment | $ 147.5 | 4.2 |  |  |
Transaction costs, Sale of Oil and Gas Properties | 1.9 |  |  |  |
Gain (Loss) on Disposition of Oil and Gas Property | $ 105.6 |  |  |  |
Compass Production Partners [Member] | Compass Credit Agreement [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Borrowing Capacity |  | 160.0 |  |  | $ 327.0
Compass Production Partners [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Repayments of Debt |  | $ 167.0 |  |  |
Spectrum Brands [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage Of Ownership Interest |  | 57.90% |  |  |
FGL [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage Of Ownership Interest |  | 80.40% |  |  |
Compass Production Partners [Member] | Compass Production Partners [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage Of Ownership Interest |  | 99.80% |  |  |
FGL [Member] | Anbang Insurance Group Co., Ltd. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Share Price |  |  |  | $ 26.80 |

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