SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Accounts and Notes Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 3,034	$ 3,280
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	2,789	3,020
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 245	$ 260