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Debt - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	$ (150)	$ 0	$ (150)	$ 0
WES Operating [Member]
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	(150)	$ 0	(150)	$ 0
WES Operating [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount	0		0		$ 440,505
WES Operating [Member] \| RCF [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility, outstanding borrowings	0		0
Facility, available borrowing capacity	$ 1,800,000		$ 1,800,000
Facility, interest rate at period end	4.95%	5.62%	4.95%	5.62%
Facility, fee rate			0.20%	0.20%
WES Operating [Member] \| Commercial Paper Program \| Commercial Paper Program
Debt Instrument [Line Items]
Principal amount	$ 163,300		$ 163,300		0
Facility, maximum borrowing capacity	$ 2,000,000		$ 2,000,000
Commercial paper, weighted average interest rate	4.27%		4.27%
WES Operating [Member] \| Commercial Paper Program \| Commercial Paper Program \| Maximum [Member]
Debt Instrument [Line Items]
Commercial paper, term			397 days
WES Operating [Member] \| Commercial Paper Program \| Commercial Paper Program \| Weighted Average
Debt Instrument [Line Items]
Commercial paper, term			20 days
WES Operating [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 8,936,329		$ 8,936,329		8,236,329
Gain (Loss) on Extinguishment of Debt			$ (200)
WES Operating [Member] \| Senior Notes [Member] \| 4.050% Senior Notes due 2030 [Member]
Debt Instrument [Line Items]
Senior note, effective interest rate	4.169%	4.169%	4.169%	4.169%
WES Operating [Member] \| Senior Notes [Member] \| 5.250% Senior Notes due 2050 [Member]
Debt Instrument [Line Items]
Senior note, effective interest rate	5.363%	5.363%	5.363%	5.363%
WES Operating [Member] \| Senior Notes [Member] \| 4.650% Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.65%		4.65%
WES Operating [Member] \| Senior Notes [Member] \| 4.800% Senior Notes Due 2031 and 5.500% Senior Notes Due 2035
Debt Instrument [Line Items]
Principal amount					$ 1,200,000
WES Operating [Member] \| Senior Notes [Member] \| 5.700% Senior Notes due 2036 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.70%		5.70%
Principal amount	$ 700,000		$ 700,000