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Long-Term Debt (Narrative) (Detail) - USD ($)
$ in Millions
Feb. 26, 2015
Jun. 30, 2015
Dec. 31, 2014
Long Term Debt Other Disclosures [Abstract]      
Weighted average interest rate   8.40% 8.10%
Market value   $ 19,200.0 $ 19,700.0
Term Loan B [Member]      
Long Term Debt Other Disclosures [Abstract]      
Early Repayment of Senior Debt $ 916.1    
Term Loan C [Member]      
Long Term Debt Other Disclosures [Abstract]      
Early Repayment of Senior Debt $ 15.2    
Receivables Based Facility Due 2017 [Member]      
Long Term Debt Other Disclosures [Abstract]      
Line of credit facility maximum borrowing capacity   535.0  
Line Of Credit Facility Amount Outstanding   120.0  
Subsidiary Senior Revolving Credit Facility Due 2018 [Member]      
Long Term Debt Other Disclosures [Abstract]      
Line of credit facility maximum borrowing capacity   $ 75.0