SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Accounts and Notes Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 3,305	$ 3,521
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	3,055	3,249
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 250	$ 272