Quarterly report pursuant to Section 13 or 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
Sep. 30, 2017
Dec. 31, 2016
Real Estate Properties [Line Items]    
Accumulated amortization of lease intangibles $ (4) $ (2)
Real Estate 314 172
Land [Member]    
Real Estate Properties [Line Items]    
Real Estate 226 145
Lease Intangibles [Member]    
Real Estate Properties [Line Items]    
Real Estate $ 92 $ 29