Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - Commodity Contract - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Natural Gas | Price Swaps
Financial Assets:
Assets, fair value disclosure		$ 29
Financial Liabilities:
Liabilities, fair value disclosure	$ 703	121
Natural Gas | Price Swaps | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Assets, fair value disclosure		0
Financial Liabilities:
Liabilities, fair value disclosure	0	0
Natural Gas | Price Swaps | Significant Other Observable Inputs (Level 2)
Financial Assets:
Assets, fair value disclosure		29
Financial Liabilities:
Liabilities, fair value disclosure	703	121
Natural Gas | Price Swaps | Significant Unobservable Inputs (Level 3)
Financial Assets:
Assets, fair value disclosure		0
Financial Liabilities:
Liabilities, fair value disclosure	0	0
Natural Gas | Basis Swaps
Financial Assets:
Assets, fair value disclosure	29	2
Financial Liabilities:
Liabilities, fair value disclosure		1
Natural Gas | Basis Swaps | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Assets, fair value disclosure	0	0
Financial Liabilities:
Liabilities, fair value disclosure		0
Natural Gas | Basis Swaps | Significant Other Observable Inputs (Level 2)
Financial Assets:
Assets, fair value disclosure	29	2
Financial Liabilities:
Liabilities, fair value disclosure		1
Natural Gas | Basis Swaps | Significant Unobservable Inputs (Level 3)
Financial Assets:
Assets, fair value disclosure	0	0
Financial Liabilities:
Liabilities, fair value disclosure		0
Crude Oil | Price Swaps
Financial Assets:
Assets, fair value disclosure		15
Financial Liabilities:
Liabilities, fair value disclosure	190	340
Crude Oil | Price Swaps | Quoted Prices in Active Markets (Level 1)
Financial Assets:
Assets, fair value disclosure		0
Financial Liabilities:
Liabilities, fair value disclosure	0	0
Crude Oil | Price Swaps | Significant Other Observable Inputs (Level 2)
Financial Assets:
Assets, fair value disclosure		15
Financial Liabilities:
Liabilities, fair value disclosure	190	340
Crude Oil | Price Swaps | Significant Unobservable Inputs (Level 3)
Financial Assets:
Assets, fair value disclosure		0
Financial Liabilities:
Liabilities, fair value disclosure	$ 0	0
Crude Oil | Roll Differential Swap
Financial Liabilities:
Liabilities, fair value disclosure		24
Crude Oil | Roll Differential Swap | Quoted Prices in Active Markets (Level 1)
Financial Liabilities:
Liabilities, fair value disclosure		0
Crude Oil | Roll Differential Swap | Significant Other Observable Inputs (Level 2)
Financial Liabilities:
Liabilities, fair value disclosure		24
Crude Oil | Roll Differential Swap | Significant Unobservable Inputs (Level 3)
Financial Liabilities:
Liabilities, fair value disclosure		$ 0