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Borrowings and Other Obligations (Schedule of Short-term Debt) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Short-term Debt [Line Items]    
Other Short-term Financing Arrangements $ 14 $ 13
Short-term Borrowings 14 13
Long-term Debt 2,602 2,151
Senior Notes    
Short-term Debt [Line Items]    
Long-term Debt 2,098 2,097
Other short-term bank loans    
Short-term Debt [Line Items]    
Finance Lease, Liability, Noncurrent 48 54
Secured Debt    
Short-term Debt [Line Items]    
Long-term Debt 456 0
Other short-term bank loans    
Short-term Debt [Line Items]    
Finance Lease Current Portion 9 10
Other Short-term Financing Arrangements $ 5 $ 3