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Short And Long-Term Debt Loss on the Early Extinguishment of Debt and Write-Off of Financing Costs (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
[1]
Mar. 31, 2019
Sep. 30, 2018
[1]
Sep. 30, 2019
[1]
Sep. 30, 2018
Debt Disclosure [Abstract]          
(Gain) loss on the early extinguishment of debt $ (10) $ 5 $ 0 $ (5) $ 7 [1]
Write off of Deferred Debt Issuance Cost         $ 2
[1] Former parent legacy items and (gain) loss on the early extinguishment of debt is recorded in the Corporate and Other segment.