RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net periodic benefit costs:
Employer contributions to pension plan	$ 1	$ 1	$ 6	$ 7
Expected contribution to defined benefit pension plans during the reminder of 2017			1
Pension Benefit
Net periodic benefit costs:
Service cost			1	1
Interest cost	1	1	2	2
Expected return on plan assets	(1)	(1)	(2)	(2)
Recognized actuarial loss		1	1	1
Settlement loss	1	1	4	6
Total	1	2	6	8
Postretirement Benefit
Net periodic benefit costs:
Service cost	1	1	3	3
Interest cost	1	1	3	3
Total	$ 2	$ 2	$ 6	$ 6