RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT 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	$ 7	$ 7	$ 11
Interest cost	18	18	23
Expected return on plan assets	(24)	(27)	(33)
Recognized actuarial loss	12	10	6
Other costs and adjustments	4	(4)	(8)
Total	17	4	(1)
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	10
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	19	26	24
Interest cost	39	40	44
Recognized actuarial loss	15	27	20
Other costs and adjustments	1	1	1
Total	74	$ 94	$ 89
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	15
Estimated prior service cost that will be amortized from AOCI into net periodic benefit cost over the next fiscal year	$ 1