SEGMENTS - Operating Segments Financial Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Total revenues (Note K)	$ 4,781	$ 4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,897)	(3,347)
Operating costs	(572)	(296)
Adjusted EBITDA from unconsolidated affiliates	101	56
Noncash compensation expense and other	15	10
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(254)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,939	789	$ 1,874
Total assets	44,390	24,464	$ 44,266
Capital expenditures	512	289
Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	5,475	5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(3,592)	(3,984)
Operating costs	(568)	(302)
Adjusted EBITDA from unconsolidated affiliates	101
Noncash compensation expense and other	24	12
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(253)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,937	788
Total assets	44,336	23,575
Capital expenditures	490	281
Natural Gas Gathering and Processing | Natural Gas Gathering and Processing Intersegment
Segment Reporting Information [Line Items]
Total revenues (Note K)	620	631
Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	1,010	1,258
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)	(875)
Operating costs	(117)	(105)
Adjusted EBITDA from unconsolidated affiliates	2	1
Noncash compensation expense and other	5	4
Segment adjusted EBITDA	306	285
Equity in net earnings from investments	(70)	(67)
Depreciation and amortization	2	0
Investments in unconsolidated affiliates	25	26
Total assets	7,021	6,899
Capital expenditures	116	98
Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,436	3,735
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,698)	(3,095)
Operating costs	(181)	(152)
Adjusted EBITDA from unconsolidated affiliates	17	11
Noncash compensation expense and other	14	6
Segment adjusted EBITDA	588	1,283
Equity in net earnings from investments	(85)	(78)
Depreciation and amortization	15	9
Investments in unconsolidated affiliates	414	413
Total assets	15,279	14,437
Capital expenditures	253	137
Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	185	171
Cost of sales and fuel (exclusive of depreciation and operating costs)	(15)	(14)
Operating costs	(53)	(45)
Adjusted EBITDA from unconsolidated affiliates	47	44
Noncash compensation expense and other	1	2
Segment adjusted EBITDA	165	158
Equity in net earnings from investments	(18)	(17)
Depreciation and amortization	36	31
Investments in unconsolidated affiliates	522	349
Total assets	2,635	2,239
Capital expenditures	79	46
Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	844
Cost of sales and fuel (exclusive of depreciation and operating costs)	(285)
Operating costs	(217)
Adjusted EBITDA from unconsolidated affiliates	35	56
Noncash compensation expense and other	4
Segment adjusted EBITDA	381
Equity in net earnings from investments	(80)	(162)
Depreciation and amortization	23	40
Investments in unconsolidated affiliates	976	788
Total assets	19,401	23,575
Capital expenditures	42	281
Liquids commodity sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,556
Liquids commodity sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	4,238
Liquids commodity sales | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	623
Liquids commodity sales | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,264
Liquids commodity sales | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Liquids commodity sales | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	351
Residue natural gas sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	344	568
Residue natural gas sales | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Residue natural gas sales | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	28	25
Residue natural gas sales | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Gathering, processing and exchange services revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	35	38
Gathering, processing and exchange services revenue | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	122	131
Gathering, processing and exchange services revenue | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Gathering, processing and exchange services revenue | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Transportation and storage revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	664	193
Transportation and storage revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	671	195
Transportation and storage revenue | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Transportation and storage revenue | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	48	50
Transportation and storage revenue | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	145
Transportation and storage revenue | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	466
Other
Segment Reporting Information [Line Items]
Total revenues (Note K)	32	5
Other | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	37	12
Other | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	8	8
Other | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	2	3
Other | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	$ 1
Other | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	$ 27