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Debt - Schedule of Short and Long Term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
May 28, 2019
Short-Term Debt:      
Short-term borrowings $ 20 $ 3  
Long-Term Debt:      
Total Debt 191 171  
Convertible Senior Notes | 4% Convertible Senior Dotes due 2024      
Long-Term Debt:      
4.00% Convertible Senior Notes due 2024 (Carrying value) $ 165 160  
Stated interest rate 4.00%   4.00%
Secured Debt | Other Long-Term Borrowings      
Long-Term Debt:      
4.00% Convertible Senior Notes due 2024 (Carrying value) $ 6 $ 8