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Commitments and Contingent Liabilities Guarantee Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Guarantor Obligations [Line Items]      
Guarantee Obligations $ 96 $ 97 $ 80
Factoring Agreement [Member]      
Guarantor Obligations [Line Items]      
Guarantee Obligations 20 16 11
Agreements with lenders to provide financing for select customers [Member]      
Guarantor Obligations [Line Items]      
Accounts Receivable, after Allowance for Credit Loss 637 $ 27 $ 596
Current Portion [Member]      
Guarantor Obligations [Line Items]      
Guarantee Obligations $ 1