RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits
Net periodic benefit costs:
Service cost-benefits earned during the period	$ 1	$ 4	$ 4
Interest cost on projected benefit obligation	3	4	4
Expected return on plan assets	(3)	(5)	(6)
Amortization of net actuarial loss (gain)	2	3	2
Settlement cost	8	18	2
Net periodic benefit cost	11	24	6
Amounts recognized in other comprehensive income (loss):
Net actuarial (loss) gain	(9)	(28)	(6)
Net prior service (cost) credit		12
Settlement cost	8	18	2
Amortization of net actuarial gain/loss	2	3	2
Total recognized in other comprehensive income (loss)	1	5	(2)
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year
Estimated net loss that will be amortized from AOCI into net periodic benefit cost over the next fiscal year	2
Estimated prior service cost that will be amortized from AOCI into net periodic benefit cost over the next fiscal year	0
Postretirement Benefits
Net periodic benefit costs:
Service cost-benefits earned during the period	3	5	4
Interest cost on projected benefit obligation	3	3	2
Amortization of net actuarial loss (gain)			1
Curtailment loss		5
Net periodic benefit cost	6	13	7
Amounts recognized in other comprehensive income (loss):
Net actuarial (loss) gain		9	1
Transfer adjustment			2
Amortization of net actuarial gain/loss			1
Total recognized in other comprehensive income (loss)		$ 9	$ 4
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year
Estimated net loss that will be amortized from AOCI into net periodic benefit cost over the next fiscal year	0
Estimated prior service cost that will be amortized from AOCI into net periodic benefit cost over the next fiscal year	$ 0