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Goodwill and Intangible Assets (Schedule Of Other Intangible Asset Balances For Continuing Operations) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]    
Gross $ 345 $ 344
Accumulated Amortization (187) (179)
Net 158 165
Customer relationships [Member]    
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]    
Gross 173 172
Accumulated Amortization (165) (160)
Net 7 12
Other [Member]    
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]    
Gross 32 32
Accumulated Amortization (22) (19)
Net 10 13
Trade names [Member]    
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]    
Gross [1] 140 140
Net [1] $ 140 $ 140
[1] Not subject to amortization.