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SEGMENTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Segment Reporting, Disclosure of Major Customers 11.6 10 10
Operating costs $ (1,067,088) $ (886,204) $ (982,864)
Equity in net earnings (loss) from investments 122,520 143,241 154,541
Depreciation and amortization (621,701) (578,662) (476,535)
Impairment charges 0 (644,930) 0
Investments in unconsolidated affiliates (Note M) 797,613 805,032 861,844
Noncash compensation expense 42,592 8,540 26,699
Total assets 23,621,613 23,078,754 21,812,121
Capital expenditures 696,854 2,195,381 3,848,349
Operating income (loss) 2,596,259 1,361,357 1,914,353
Net income 1,499,706 612,809 1,278,577
Interest expense, net of capitalized interest 732,924 712,886 491,773
Income tax expense 484,498 189,507 372,414
Other corporate costs and equity AFUDC (845) (42,631) (68,767)
Revenues 16,540,309 8,542,242 10,164,367
Cost of sales and fuel (exclusive of depreciation and operating costs) (12,256,655) (5,110,146) (6,788,040)
Gain (Loss) on Extinguishment of Debt   22,300  
Noncustomer [Domain]      
Segment Reporting Information [Line Items]      
Revenues (565,000) 65,800 139,600
Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Operating costs (367,390) (326,938) (368,352)
Equity in net earnings (loss) from investments 3,757 (1,123) (6,292)
Noncash compensation expense and other 17,299 1,952 10,965
Segment adjusted EBITDA 889,127 650,036 702,650
Depreciation and amortization (260,011) (247,010) (219,519)
Impairment charges   (566,145)  
Investments in unconsolidated affiliates (Note M) 27,018 22,757 34,426
Total assets 6,768,955 6,499,908 6,795,744
Capital expenditures 275,165 446,142 926,489
Revenues 4,461,539 1,820,121 2,368,639
Cost of sales and fuel (exclusive of depreciation and operating costs) (3,226,078) (843,976) (1,302,310)
Natural Gas Gathering And Processing | Natural Gas Gathering and Processing Intersegment [Member]      
Segment Reporting Information [Line Items]      
Revenues 2,900,000 865,600 1,200,000
Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Operating costs (528,084) (412,900) (456,892)
Equity in net earnings (loss) from investments 21,000 39,938 65,123
Noncash compensation expense and other 18,511 8,748 15,936
Segment adjusted EBITDA 1,963,639 1,617,241 1,465,765
Depreciation and amortization (298,937) (271,900) (196,132)
Impairment charges   (78,785)  
Investments in unconsolidated affiliates (Note M) 416,648 423,494 439,393
Total assets 14,502,372 13,636,109 12,551,476
Capital expenditures 306,949 1,655,759 2,796,604
Revenues 14,391,873 7,090,013 8,532,516
Cost of sales and fuel (exclusive of depreciation and operating costs) (11,939,661) (5,108,558) (6,690,918)
Natural Gas Liquids | Natural Gas Liquids Regulated [Member]      
Segment Reporting Information [Line Items]      
Revenues 2,400,000 2,000,000 1,400,000
Cost of sales and fuel (exclusive of depreciation and operating costs) (607,500) (520,600) (496,800)
Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Operating costs (170,257) (141,713) (157,230)
Equity in net earnings (loss) from investments 97,763 104,426 95,710
Noncash compensation expense and other 4,637 1,540 2,977
Segment adjusted EBITDA 527,810 437,426 408,816
Depreciation and amortization (58,702) (55,739) (57,250)
Impairment charges   0  
Investments in unconsolidated affiliates (Note M) 353,947 358,781 388,025
Total assets 2,143,307 2,100,213 2,094,072
Capital expenditures 92,617 71,918 99,221
Revenues 606,903 479,982 471,987
Cost of sales and fuel (exclusive of depreciation and operating costs) (11,236) (6,809) (4,628)
Natural Gas Pipelines | Natural Gas Pipelines Regulated [Member]      
Segment Reporting Information [Line Items]      
Revenues 394,200 298,500 285,300
Cost of sales and fuel (exclusive of depreciation and operating costs) (24,300) (30,400) (20,000)
Total Segments [Member]      
Segment Reporting Information [Line Items]      
Operating costs (1,065,731) (881,551) (982,474)
Equity in net earnings (loss) from investments 122,520 143,241 154,541
Noncash compensation expense and other 40,447 12,240 29,878
Segment adjusted EBITDA 3,380,576 2,704,703 2,577,231
Depreciation and amortization (617,650) (574,649) (472,901)
Impairment charges   (644,930)  
Investments in unconsolidated affiliates (Note M) 797,613 805,032 861,844
Total assets 23,414,634 22,236,230 21,441,292
Capital expenditures 674,731 2,173,819 3,822,314
Revenues 19,460,315 9,390,116 11,373,142
Cost of sales and fuel (exclusive of depreciation and operating costs) (15,176,975) (5,959,343) (7,997,856)
Other and Eliminations      
Segment Reporting Information [Line Items]      
Operating costs (1,357) (4,653) (390)
Equity in net earnings (loss) from investments 0 0 0
Depreciation and amortization (4,051) (4,013) (3,634)
Impairment charges   0  
Investments in unconsolidated affiliates (Note M) 0 0 0
Total assets 206,979 842,524 370,829
Capital expenditures 22,123 21,562 26,035
Revenues (2,920,006) (847,874) (1,208,775)
Cost of sales and fuel (exclusive of depreciation and operating costs) 2,920,320 849,197 1,209,816
Operating Segments [Member] | Natural Gas Liquids | Natural Gas Liquids Regulated [Member]      
Segment Reporting Information [Line Items]      
Revenues 2,200,000 1,800,000 1,200,000
NGL and Condensate Sales [Member]      
Segment Reporting Information [Line Items]      
Revenues 13,569,697 6,477,869 7,944,787
NGL and Condensate Sales [Member] | Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 2,821,175 889,388 1,224,378
NGL and Condensate Sales [Member] | Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 13,653,120 6,409,332 7,910,833
NGL and Condensate Sales [Member] | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0
NGL and Condensate Sales [Member] | Total Segments [Member]      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 16,474,295 7,298,720 9,135,211
NGL and Condensate Sales [Member] | Other and Eliminations      
Segment Reporting Information [Line Items]      
Revenues (2,904,598) (820,851) (1,190,424)
Residue Natural Gas Sales [Member]      
Segment Reporting Information [Line Items]      
Revenues 1,599,393 769,319 965,975
Residue Natural Gas Sales [Member] | Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 1,483,898 771,486 966,149
Residue Natural Gas Sales [Member] | Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0
Residue Natural Gas Sales [Member] | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 115,495 8,693 1,244
Residue Natural Gas Sales [Member] | Total Segments [Member]      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 1,599,393 780,179 967,393
Residue Natural Gas Sales [Member] | Other and Eliminations      
Segment Reporting Information [Line Items]      
Revenues 0 (10,860) (1,418)
Gathering and Exchange Services Revenue [Member]      
Segment Reporting Information [Line Items]      
Revenues 653,259 630,517 578,537
Gathering and Exchange Services Revenue [Member] | Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 135,501 141,943 164,299
Gathering and Exchange Services Revenue [Member] | Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 517,758 488,574 414,238
Gathering and Exchange Services Revenue [Member] | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0
Gathering and Exchange Services Revenue [Member] | Total Segments [Member]      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 653,259 630,517 578,537
Gathering and Exchange Services Revenue [Member] | Other and Eliminations      
Segment Reporting Information [Line Items]      
Revenues 0 0 0
Transportation and Storage Revenue [Member]      
Segment Reporting Information [Line Items]      
Revenues 656,996 638,413 648,103
Transportation and Storage Revenue [Member] | Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0
Transportation and Storage Revenue [Member] | Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 179,619 182,915 197,483
Transportation and Storage Revenue [Member] | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 490,498 470,097 466,266
Transportation and Storage Revenue [Member] | Total Segments [Member]      
Segment Reporting Information [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 670,117 653,012 663,749
Transportation and Storage Revenue [Member] | Other and Eliminations      
Segment Reporting Information [Line Items]      
Revenues (13,121) (14,599) (15,646)
Other [Member]      
Segment Reporting Information [Line Items]      
Revenues 60,964 26,124 26,965
Other [Member] | Natural Gas Gathering And Processing      
Segment Reporting Information [Line Items]      
Revenues 20,965 17,304 13,813
Other [Member] | Natural Gas Liquids      
Segment Reporting Information [Line Items]      
Revenues 41,376 9,192 9,962
Other [Member] | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenues 910 1,192 4,477
Other [Member] | Total Segments [Member]      
Segment Reporting Information [Line Items]      
Revenues 63,251 27,688 28,252
Other [Member] | Other and Eliminations      
Segment Reporting Information [Line Items]      
Revenues $ (2,287) $ (1,564) $ (1,287)