Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents		$ 248,249	$ 201,999
Accounts receivable, net		601,647	436,513
Other current assets		56,397	46,252
Total current assets		906,293	684,764
Property, plant, and equipment
Cost		12,930,358	12,846,078
Less accumulated depreciation		4,455,162	4,333,171
Net property, plant, and equipment		8,475,196	8,512,907
Goodwill		4,783	4,783
Other intangible assets		736,825	744,742
Equity investments		1,163,069	1,167,187
Other assets	[1]	159,707	158,696
Total assets	[2]	11,445,873	11,273,079
Current liabilities
Accounts and imbalance payables		395,893	326,061
Short-term debt		718,153	505,932
Accrued ad valorem taxes		62,833	44,955
Accrued liabilities		160,247	263,249
Total current liabilities		1,337,126	1,140,197
Long-term liabilities
Long-term debt		6,188,750	6,400,616
Deferred income taxes		13,557	12,425
Asset retirement obligations		297,187	298,275
Other liabilities		338,446	325,806
Total long-term liabilities		6,837,940	7,037,122
Total liabilities	[3]	8,175,066	8,177,319
Equity and partners' capital
Common units (403,333,810 and 402,993,919 units issued and outstanding at March 31, 2022, and December 31, 2021, respectively)		3,134,018	2,966,955
General partner units (9,060,641 units issued and outstanding at March 31, 2022, and December 31, 2021)		(5,062)	(8,882)
Total partners' capital		3,128,956	2,958,073
Noncontrolling interests		141,851	137,687
Total equity and partners' capital		3,270,807	3,095,760
Total liabilities, equity, and partners' capital		$ 11,445,873	$ 11,273,079
Common units issued		403,333,810	402,993,919
Common units outstanding		403,333,810	402,993,919
General partner units issued		9,060,641	9,060,641
General partner units outstanding		9,060,641	9,060,641

[1] Other assets includes $14.6 million and $9.8 million of NGLs line-fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.

[2] Total assets includes related-party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related-party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5.

[3] Total liabilities includes related-party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5.