Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (b)	$ 6,153,284	$ 6,572,606
Carrying value of total debt	5,678,965	5,591,072
Senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of total debt	5,600,000	5,500,000
Senior notes | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (b)	6,100,000	6,500,000
Note payable | Note payable to EQM
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (b)	95,667	117,837
Carrying value of total debt	94,320	99,838
Note payable | Note payable to EQM | Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value (b)	$ 96,000	$ 118,000