Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail)

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DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Derivative [Line Items]      
Collateral received under contractual provisions $ 623,000,000 $ 623,000,000 $ 495,000,000
Derivative net liability position 0 0 0
Pre-tax losses related to cash flow hedges that are currently deferred in AOCI and are expected to be reclassified to income within twelve months   $ 248,000,000  
Maximum term over hedging exposures to the variability of cash flow   12 years  
Commodity Asset $ 0 $ 0 0
Derivative Instrument Recognition Period 10 years    
Change in Credit Rating      
Derivative [Line Items]      
Derivative, Additional Collateral, Obligation to Return Cash $ 0 0 $ 0
Long-term debt and finance leases | Not Designated as Hedging Instrument | Fair Value      
Derivative [Line Items]      
Liability Derivatives $ 11,000,000 $ 11,000,000