Derivative and Hedging Activities - Fair Value of Recurring Assets and Liabilities (Details) - Fair value, inputs, level 2 - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	$ (1,143)	$ (118)
Commodity contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	56	88
Derivative liability	$ (1,199)	$ (206)