Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income (loss)		$ 693,150	$ 246,076
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		407,404	384,688
Long-lived asset and other impairments		29,198	200,575
Goodwill impairment		0	441,017
Non-cash equity-based compensation expense		20,834	16,527
Deferred income taxes		2,275	2,393
Accretion and amortization of long-term obligations, net		5,873	6,482
Equity income, net – related parties		(159,337)	(176,788)
Distributions from equity-investment earnings – related parties		164,772	187,816
(Gain) loss on divestiture and other, net		(278)	3,651
(Gain) loss on early extinguishment of debt		24,944	(10,372)
Cash paid to settle interest-rate swaps		0	(19,181)
Other		46	192
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		(130,773)	(192,338)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net		56,495	37,814
Change in other items, net		(9,609)	3,341
Net cash provided by operating activities		1,104,994	1,131,893
Cash flows from investing activities
Capital expenditures		(217,757)	(372,262)
Contributions to equity investments – related parties		(3,683)	(19,017)
Distributions from equity investments in excess of cumulative earnings – related parties		30,075	21,750
Proceeds from the sale of assets to third parties		8,002	0
(Increase) decrease in materials and supplies inventory and other		(1,924)	(57,141)
Net cash used in investing activities		(187,287)	(426,670)
Cash flows from financing activities
Borrowings, net of debt issuance costs		400,000	3,681,173
Repayments of debt		(1,132,966)	(3,780,390)
Increase (decrease) in outstanding checks		(11,757)	691
Distributions to Partnership unitholders	[1]	(398,896)	(563,579)
Net contributions from (distributions to) related parties		6,673	22,674
Finance lease payments	[2]	(5,295)	(12,241)
Unit repurchases		(104,366)	0
Other		(3,492)	0
Net cash provided by (used in) financing activities		(1,262,767)	(667,140)
Net increase (decrease) in cash and cash equivalents		(345,060)	38,083
Cash and cash equivalents at beginning of period		444,922	99,962
Cash and cash equivalents at end of period		99,862	138,045
Supplemental disclosures
Non-cash unit exchange with Occidental	[1]	0	(261,878)
Interest paid, net of capitalized interest		348,904	307,713
Income taxes paid (reimbursements received)		932	(384)
Accrued capital expenditures		29,085	20,275
Chipeta [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		(2,734)	(3,923)
WES Operating [Member]
Cash flows from financing activities
Distributions to noncontrolling interest owner of WES Operating		(9,934)	(11,545)
Related Parties [Member]
Cash flows from investing activities
Purchases from related parties		(2,000)	0
Cash flows from financing activities
Distributions to Partnership unitholders		(195,205)	(301,219)
Finance lease payments		0	(6,382)
Related Parties [Member] | WES Operating [Member]
Cash flows from financing activities
Distributions to Partnership unitholders		$ (9,934)	$ (11,545)

[1] See Note 6.

[2] For the nine months ended September 30, 2020, includes related-party payments of $6.4 million.