EMPLOYEE BENEFIT PLANS - Employee Retirement Plans (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
401(k) plan
Contribution expense	$ 116,000,000	$ 105,000,000	$ 92,000,000
Projected benefit obligations
Beginning obligations	(1,455,000,000)	(1,559,000,000)
Service cost	(2,000,000)	(3,000,000)	(3,000,000)
Interest cost	(69,000,000)	(64,000,000)	(66,000,000)
Actuarial gain(loss)	(58,000,000)	96,000,000
Benefits paid/employer contributions	109,000,000	75,000,000
Ending obligations	(1,475,000,000)	(1,455,000,000)	(1,559,000,000)
Fair value of plans assets
Beginning obligations	815,000,000	898,000,000
Gain on plan assets	36,000,000	(36,000,000)
Employer contribution	25,000,000	8,000,000
Benefits paid	(90,000,000)	(55,000,000)
Ending plan assets	786,000,000	815,000,000	898,000,000
Funded status of plans	(689,000,000)	(640,000,000)
Amounts recognized in the Consolidated Balance Sheets consist of:
Other current liability	(63,000,000)	(45,000,000)
Other long-term liability	626,000,000	595,000,000
Accumulated other comprehensive loss	322,000,000	261,000,000
Accumulated benefit obligation	1,461,000,000	1,443,000,000
Components of net periodic benefit costs
Service costs	2,000,000	3,000,000	3,000,000
Interest costs	69,000,000	64,000,000	66,000,000
Expected return on plan assets	(51,000,000)	(57,000,000)	(60,000,000)
Amortization of net actuarial loss	12,000,000	12,000,000	4,000,000
Net periodic benefit cost	32,000,000	22,000,000	13,000,000
Amounts recognized in other comprehensive income (loss)
Gain (loss) adjustments recorded in other comprehensive income (loss)	(61,000,000)	15,000,000	(254,000,000)
Net actuarial gains/(losses)	(73,000,000)	3,000,000	(258,000,000)
Amounts that have not yet been recognized as components of net periodic benefit costs
Cumulative net actuarial losses	$ 322,000,000	$ 261,000,000	$ 276,000,000
SERP
Accumulated Benefit Obligations Assumptions
Discount rate (as a percent)	4.25%	4.75%
Compensation increase rate (as a percent)	3.00%	3.00%
Net Periodic Benefit Costs Assumptions:
Discount rate (as a percent)	4.75%	4.25%	5.00%
Compensation increase rate (as a percent)	3.00%	3.00%	3.00%
Amounts that have not yet been recognized as components of net periodic benefit costs
Number of frozen plans | item	3
Number of ended SERPs			$ 1
DMC Pension Plan
Fair value of plans assets
Beginning obligations	$ 815,000,000
Ending plan assets	$ 786,000,000	$ 815,000,000
Accumulated Benefit Obligations Assumptions
Discount rate (as a percent)	4.42%	4.67%
Net Periodic Benefit Costs Assumptions:
Discount rate (as a percent)	4.67%	4.16%	5.18%
Long-term rate of return on assets (as a percent)	6.50%	6.50%	7.00%
Amounts that have not yet been recognized as components of net periodic benefit costs
Change in projected benefit obligations	$ (20,000,000)	$ (25,000,000)
Maximum
Amounts that have not yet been recognized as components of net periodic benefit costs
Unrecognized prior service costs	$ 1,000,000	$ 1,000,000	$ 1,000,000