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Short And Long-Term Debt Loss on the Early Extinguishment of Debt (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Debt Disclosure [Abstract]    
Gain (Loss) on Extinguishment of Debt [1] $ (17) $ 0
Write off of Deferred Debt Issuance Cost $ 1  
[1] Loss on the early extinguishment of debt is recorded in Corporate and Other.