The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Nominal or face amount used to calculate payments on the derivative liability.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS (Credit Risk) (Details) - USD ($)	Feb. 12, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
FV of derivative instruments in net liability positions with credit risk related features, including normal purchase normal sale		$ 100,000,000	$ 41,000,000
Collateral posted		2,000,000
Additional collateral to post if credit-risk contingent features are triggered		98,000,000
Outstanding Net Payable Balances for Settled Positions
Derivative [Line Items]
Additional collateral to post if credit-risk contingent features are triggered		19,000,000
Interest Rate Swap
Derivative [Line Items]
Derivative liability, notional amount		$ 6,000,000
Interest Rate Swap \| Subsequent Event
Derivative [Line Items]
Derivative liability, notional amount	$ 0