Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Financing Receivables, Investments, Real Estate and Equity Method Investments - Components of Financing Receivables (Parenthetical) (Detail)

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Our Portfolio - Financing Receivables, Investments, Real Estate and Equity Method Investments - Components of Financing Receivables (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Receivables [Abstract]    
Financing receivables held-for-sale $ 62.3us-gaap_ReceivablesHeldForSaleAmount $ 24.8us-gaap_ReceivablesHeldForSaleAmount