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Schedule of Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
2020 $ 1    
2021 1    
2022 1    
2023 1    
2024 1    
Other Intangible Assets | International      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense included in other operating expenses $ 1 $ 1 $ 2