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FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2021	May 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Amounts recognized in income		$ 1,000,000
Amortization period		10 years
Accumulated other comprehensive loss		$ (55,000,000)				$ (39,000,000)
Cash Flow Hedging
Derivative [Line Items]
Accumulated other comprehensive loss		$ 4,000,000				4,000,000
Cash Flow Hedging | Scenario, Forecast
Derivative [Line Items]
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months			$ 1,000,000
Forward Starting Interest Rate Swaps
Derivative [Line Items]
Notional amount					$ 25,000,000
Interest Rate Lock Agreements
Derivative [Line Items]
Notional amount				$ 275,000,000
Fixed-to-variable interest rate swaps
Derivative [Line Items]
Notional amount						$ 1,200,000,000
Proceeds from derivative	$ 40,000,000

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