SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Accounts and Notes Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 3,342	$ 3,064
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	2,873	2,776
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 469	$ 288