SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Accounts and Notes Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 3,549	$ 3,064
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	3,222	2,776
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	$ 327	$ 288