DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Derivative Assets and Liabilities and Locations on Consolidated Balance Sheet (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative asset	$ 0	$ 11
Derivative liability	199	192
Current Assets: Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	6
Other Assets: Deferred charges and other
Derivatives, Fair Value [Line Items]
Derivative asset	0	5
Current Liabilities: Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	31	0
Deferred Credits and Other Noncurrent Liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liability	$ 168	$ 192