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Commitments and Contingent Liabilities Guarantee Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Guarantor Obligations [Line Items]      
Guarantee Obligations $ 115 $ 94 $ 112
Factoring Agreement [Member]      
Guarantor Obligations [Line Items]      
Guarantee Obligations 22 17 20
Agreements with lenders to provide financing for select customers [Member]      
Guarantor Obligations [Line Items]      
Accounts Receivable, after Allowance for Credit Loss $ 648 $ 16 $ 622