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Equity-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of units vested	$ 38.2	$ 23.4	$ 21.7
Unvested equity-based compensation expense	$ 49.7
Weighted-average term of unvested awards	1 year 1 month 6 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation - payout percentage	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation - payout percentage	200.00%
Western Gas Partners, LP 2017 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units authorized under LTIP	3,431,251
Units available under LTIP	322,228
Western Midstream Partners, LP 2021 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units authorized under LTIP	9,500,000
Units available under LTIP	8,385,682
Executive Long-Term Incentive Plans [Member] \| Time-vested Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting period	3 years
Executive Long-Term Incentive Plans [Member] \| TUR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting period	3 years
Executive Long-Term Incentive Plans [Member] \| ROA Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting period	3 years
Long-Term Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
In-kind distributions issued, number of units		3,253	13,754
Equity-based compensation, expense	$ 38.0	$ 32.0	$ 25.5
Non-Executive Long-Term Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting period	3 years
Independent Director Long-Term Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting period	1 year