Quarterly report pursuant to Section 13 or 15(d)

Our Portfolio - Components of Financing Receivables (Parenthetical) (Detail)

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Our Portfolio - Components of Financing Receivables (Parenthetical) (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Receivables [Abstract]    
Financing receivables held-for-sale $ 42 $ 60