Consolidated Balance Sheets - WES Operating (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Materials and supplies inventory		$ 92,400	$ 60,400
Total assets	[1]	11,626,554	11,271,628
Accounts receivable, net		614,836	554,263
Total liabilities	[2]	8,671,462	8,163,513
Related Parties [Member]
Total assets		1,294,344	1,289,269
Accounts receivable, net		340,927	313,937
Total liabilities		360,843	312,305
Natural-Gas Liquids [Member]
NGLs line-fill inventory		6,500	6,500
WES Operating [Member]
Materials and supplies inventory		92,400	60,400
Total assets	[3]	11,619,138	11,268,259
Accounts receivable, net		614,816	554,263
Total liabilities	[4]	8,641,315	8,148,152
WES Operating [Member] | Related Parties [Member]
Total assets		1,300,000	1,300,000
Accounts receivable, net		340,900	313,900
Total liabilities		376,400	356,000
WES Operating [Member] | Natural-Gas Liquids [Member]
NGLs line-fill inventory		$ 6,500	$ 6,500

[1] Total assets includes related-party amounts of $1.3 billion as of September 30, 2023, and December 31, 2022, which includes related-party Accounts receivable, net of $340.9 million and $313.9 million as of September 30, 2023, and December 31, 2022, respectively. See Note 6.

[2] Total liabilities includes related-party amounts of $360.8 million and $312.3 million as of September 30, 2023, and December 31, 2022, respectively. See Note 6.

[3] Total assets includes related-party amounts of $1.3 billion as of September 30, 2023, and December 31, 2022, which includes related-party Accounts receivable, net of $340.9 million and $313.9 million as of September 30, 2023, and December 31, 2022, respectively. See Note 6.

[4] Total liabilities includes related-party amounts of $376.4 million and $356.0 million as of September 30, 2023, and December 31, 2022, respectively. See Note 6.