INVESTMENTS AND RELATED-PARTY TRANSACTIONS - Related Parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
EQUITY INVESTMENTS
Sales	$ 21,593	$ 22,019	$ 23,156
Purchases	4	28	159
Services	1,505	1,415	$ 1,156
Advances and amounts due from related parties	2,575	2,839
Amounts due to related parties	$ 3,285	$ 3,472
WES
EQUITY INVESTMENTS
Sales to related party (as a percent)	53.00%	58.00%	63.00%
Related Party
EQUITY INVESTMENTS
Sales	$ 128	$ 146	$ 153
Advances and amounts due from related parties	30	36	49
Amounts due to related parties	$ 333	$ 342	$ 331