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Debt (Schedule Of Short-Term Debt And Current Portion Of Long-Term Debt) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Unsecured debt securities $ 1,099 $ 1,151
Non-recourse debt and notes 21 25
Finance lease obligations 71 57
Commercial paper 6,109 1,895
Other notes 40 62
Short-term debt and current portion of long-term debt $ 7,340 $ 3,190