Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents		$ 112,645	$ 286,656
Accounts receivable, net		558,300	554,263
Other current assets		64,353	59,506
Total current assets		735,298	900,425
Property, plant, and equipment
Cost		13,550,060	13,365,593
Less accumulated depreciation		5,008,838	4,823,993
Net property, plant, and equipment		8,541,222	8,541,600
Goodwill		4,783	4,783
Other intangible assets		705,158	713,075
Equity investments		931,852	944,696
Other assets	[1]	194,175	167,049
Total assets	[2]	11,112,488	11,271,628
Current liabilities
Accounts and imbalance payables		362,398	360,562
Short-term debt		2,714	215,780
Accrued ad valorem taxes		52,717	72,875
Accrued liabilities		163,498	254,640
Total current liabilities		581,327	903,857
Long-term liabilities
Long-term debt		6,693,941	6,569,582
Deferred income taxes		15,348	14,424
Asset retirement obligations		293,718	290,021
Other liabilities		426,590	385,629
Total long-term liabilities		7,429,597	7,259,656
Total liabilities	[3]	8,010,924	8,163,513
Equity and partners' capital
Common units (384,615,227 and 384,070,984 units issued and outstanding at March 31, 2023, and December 31, 2022, respectively)		2,964,712	2,969,604
General partner units (9,060,641 units issued and outstanding at March 31, 2023, and December 31, 2022)		2,261	2,105
Total partners' capital		2,966,973	2,971,709
Noncontrolling interests		134,591	136,406
Total equity and partners' capital		3,101,564	3,108,115
Total liabilities, equity, and partners' capital		$ 11,112,488	$ 11,271,628
Common units issued		384,615,227	384,070,984
Common units outstanding		384,615,227	384,070,984
General partner units issued		9,060,641	9,060,641
General partner units outstanding		9,060,641	9,060,641

[1] Other assets includes $6.3 million and $6.5 million of NGLs line-fill inventory as of March 31, 2023, and December 31, 2022, respectively. Other assets also includes $77.4 million and $60.4 million of materials and supplies inventory as of March 31, 2023, and December 31, 2022, respectively.

[2] Total assets includes related-party amounts of $1.3 billion as of March 31, 2023, and December 31, 2022, which includes related-party Accounts receivable, net of $307.6 million and $313.9 million as of March 31, 2023, and December 31, 2022, respectively. See Note 5.

[3] Total liabilities includes related-party amounts of $318.7 million and $312.3 million as of March 31, 2023, and December 31, 2022, respectively. See Note 5.