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Intangible Assets (Details 2) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Intangible assets with indefinite lives    
Gross Carrying Amount $ 31 $ 31
Accumulated Impairment Charges (1) (1)
Net 30 30
Trade names    
Intangible assets with indefinite lives    
Gross Carrying Amount 22 22
Accumulated Impairment Charges 0 0
Net 22 22
Other    
Intangible assets with indefinite lives    
Gross Carrying Amount 9 9
Accumulated Impairment Charges (1) (1)
Net $ 8 $ 8