DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Value Measurement Inputs (Details) $ in Millions	Dec. 31, 2021 USD ($) $ / MMBTU	Dec. 31, 2020 USD ($)
Preferred Units embedded derivative | Recurring
Embedded Derivative [Line Items]
Derivative liability, fair value, gross liability | $	$ 57	$ 139
Significant Unobservable Inputs (Level 3) | Preferred Units embedded derivative | Recurring
Embedded Derivative [Line Items]
Derivative liability, fair value, gross liability | $	$ 57	$ 139
Significant Unobservable Inputs (Level 3) | Measurement Input, Risk Free Interest Rate | Minimum
Embedded Derivative [Line Items]
Preferred Units embedded derivative | $ / MMBTU	0.0554
Significant Unobservable Inputs (Level 3) | Measurement Input, Risk Free Interest Rate | Maximum
Embedded Derivative [Line Items]
Preferred Units embedded derivative | $ / MMBTU	0.1121
Significant Unobservable Inputs (Level 3) | Measurement Input Interest Rate Volatility
Embedded Derivative [Line Items]
Preferred Units embedded derivative	0.4008