EMPLOYEE BENEFITS PLANS (Change in Projected Benefit Obligation and Plan Assets and Reconciliation of Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Change in Benefit Obligation
Beginning of Period	$ 606	$ 525
Actuarial (Gain) Loss	(6)	76
Interest Cost	14	16	$ 18
Service Cost	20	16	13
Benefits Paid	(34)	(27)
End of Period	600	606	525
Change in Fair Value of Plan Assets
Beginning of Period	514	446
Actual Return on Plan Assets	43	78
Benefits Paid	(32)	(26)
Employer Contributions	13	16
End of Period	538	514	446
Funded Status at End of Period	(62)	(92)
Expected future contribution	11
Other Postretirement Benefits
Change in Benefit Obligation
Beginning of Period	99	79
Actuarial (Gain) Loss	(12)	18
Interest Cost	2	3	3
Service Cost	6	4	4
Benefits Paid	(5)	(5)
End of Period	90	99	79
Change in Fair Value of Plan Assets
Beginning of Period	24	21
Actual Return on Plan Assets	3	3
Benefits Paid	(2)	(5)
Employer Contributions	3	5
End of Period	28	24	$ 21
Funded Status at End of Period	(62)	$ (75)
Expected future contribution	$ 1