Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Fair Value Derivative Balance Sheet Location (Details)

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DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Fair Value Derivative Balance Sheet Location (Details) - Designated as Hedging Instrument - Long-term debt and finance leases - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Carrying Amount    
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 1,300 $ 2,816
Fair Value    
Derivatives, Fair Value [Line Items]    
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) $ 26 $ 42