Quarterly report pursuant to Section 13 or 15(d)

Our Portfolio - Components of Real Estate Portfolio (Details)

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Our Portfolio - Components of Real Estate Portfolio (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Real Estate Properties [Line Items]    
Real estate $ 340 $ 341
Accumulated amortization of lease intangibles (6) (5)
Land [Member]    
Real Estate Properties [Line Items]    
Real estate 247 247
Lease Intangibles [Member]    
Real Estate Properties [Line Items]    
Real estate $ 99 $ 99