VARIABLE INTEREST ENTITIES (Schedule of Consolidated Variable Interest Entities, Carrying Amounts of Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 01, 2019
Variable Interest Entity [Line Items]
Payments to Noncontrolling Interests		$ 0	$ 0	$ 297
Cash and cash equivalents at end of year	$ 5,104	2,988	5,104	2,367
Other current assets	19,084	20,848	19,084
Net property	20,239	20,555	20,239	$ 20,996
Other noncurrent assets	1,249	1,456	1,249
Total Assets	61,470	62,990	61,470
Current liabilities (less than $1 million at 12/31/2017)	11,108	13,226	11,108
Long-term debt	16,491	14,280	16,491
Other noncurrent obligations	6,279	6,602	6,279
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents at end of year	26	40	26
Other current assets	44	40	44
Net property	232	184	232
Other noncurrent assets	17	15	17
Total Assets	319	279	319
Current liabilities (less than $1 million at 12/31/2017)	73	37	73
Long-term debt	6	3	6
Other noncurrent obligations	18	13	18
Liabilities	97	$ 53	$ 97
MTP HPPO [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity Purchase Amount					$ 331
Payments to Noncontrolling Interests	$ 166