DERIVATIVE INSTRUMENTS - Additional Information (Detail) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) yr	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) yr	Dec. 31, 2019 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Cash flow hedging activity, maximum time period l yr | yr	6		6
Derivative, net liability position, aggregate fair value	$ 268		$ 268	$ 301
Additional collateral, aggregate fair value	156		156
Notional Amount	58,656		58,656	61,695
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			(5)
Reduction in Collar Program		$ 3,000
Reduction in Collar and Forward Program	5,000
Interest rate swaps | Senior Notes
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount	2,300		2,300
Foreign currency options
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount	5,000		5,000
Cash flow hedges
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount	$ 18		$ 18	$ 75