Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Components of Real Estate Portfolio (Detail)

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Our Portfolio - Components of Real Estate Portfolio (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Real Estate Properties [Line Items]    
Accumulated amortization of real estate intangibles $ (1) $ 0
Real Estate 156 114
Land [Member]    
Real Estate Properties [Line Items]    
Real Estate 129 91
Real Estate Related Intangibles [Member]    
Real Estate Properties [Line Items]    
Real Estate $ 28 $ 23