Debt - Debt Activity Table (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Mar. 31, 2025 |
Jun. 30, 2025 |
|
| Changes in Debt Outstanding [Roll Forward] | ||
| Beginning balance | $ 7,937,679 | $ 7,937,679 |
| Ending balance | 6,937,341 | |
| WES Operating [Member] | ||
| Changes in Debt Outstanding [Roll Forward] | ||
| Other | 3,579 | |
| WES Operating [Member] | Senior Notes [Member] | ||
| Changes in Debt Outstanding [Roll Forward] | ||
| Repayments of senior notes | $ (150,000) | |
| WES Operating [Member] | 3.100% Senior Notes due 2025 [Member] | Senior Notes [Member] | ||
| Changes in Debt Outstanding [Roll Forward] | ||
| Repayments of senior notes | $ (663,831) | |
| Senior note, interest rate | 3.10% | |
| WES Operating [Member] | 3.950% Senior Notes due 2025 [Member] | Senior Notes [Member] | ||
| Changes in Debt Outstanding [Roll Forward] | ||
| Repayments of senior notes | $ (336,758) | |
| Senior note, interest rate | 3.95% | |
| WES Operating [Member] | Finance Lease Liability [Member] | ||
| Changes in Debt Outstanding [Roll Forward] | ||
| Finance lease liabilities | $ (3,328) |