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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. 31, 2016
Jan. 31, 2017
Jan. 13, 2017
Sep. 30, 2016
Nov. 08, 2015
Business Acquisition [Line Items]          
Goodwill $ 2,464.5     $ 2,478.4  
Document Period End Date Dec. 31, 2016        
Funds Withheld Receivable $ 1,609.0     1,650.4  
Severance Costs 0.5        
Long-term Debt $ 5,563.4     $ 5,540.7  
Zap Com Corporation [Member]          
Business Acquisition [Line Items]          
Percentage Of Ownership Interest 99.50%        
Spectrum Brands [Member]          
Business Acquisition [Line Items]          
Percentage Of Ownership Interest 58.30%        
FGL [Member]          
Business Acquisition [Line Items]          
Percentage Of Ownership Interest 80.50%        
FGL [Member] | Anbang Insurance Group Co., Ltd. [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Share Price         $ 26.80
Severance Cost, Accrued Bonus [Member]          
Business Acquisition [Line Items]          
Severance Costs $ 8.0        
Subsequent Event [Member] | Margin Loan, due July 13, 2018 [Member]          
Business Acquisition [Line Items]          
Security Owned and Pledged as Collateral, Fair Value     $ 508.0    
Subsequent Event [Member] | Margin Loan, due July 13, 2018 [Member] | Secured Debt [Member]          
Business Acquisition [Line Items]          
Debt Issuance Costs, Gross     1.1    
Line of Credit Facility, Maximum Borrowing Capacity     $ 150.0    
Long-term Debt   $ 50.0      
Interest Rate Cap [Member] | Spectrum Brands [Member] | Revolving Credit Facility [Member] | Maximum [Member]          
Business Acquisition [Line Items]          
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 2.75%        
Interest Rate Cap [Member] | Subsequent Event [Member] | Margin Loan, due July 13, 2018 [Member] | Secured Debt [Member]          
Business Acquisition [Line Items]          
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate     2.35%