PENSION AND POSTRETIREMENT BENEFIT PLANS (Fair Value Disclosures) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 6,015	$ 6,505
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Asset	446	511
Purchases, sales and settlements, net	(85)	(103)
Realized gains/(losses)	30	46
Unrealized gains/(losses)	(27)	(8)
Fair value at December 31, Asset	$ 364	446
Percentage of U.S. pension plan equity investments that are actively managed	88.00%
The percentage of employer common stock in total plan assets is less than	1.00%
Equity Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 785	1,115
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Target allocation percentage of assets	43.00%
Equity Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 1,695	1,559
Fixed Income Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	973	1,117
Corporate Debt Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	1,382	1,481
Venture Capital and Limited Partnerships [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	249	327
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Asset	327	369
Purchases, sales and settlements, net	(92)	(88)
Realized gains/(losses)	41	61
Unrealized gains/(losses)	(27)	(15)
Fair value at December 31, Asset	$ 249	327
Target allocation percentage of assets	7.00%
U.S. Treasury and Agency Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 517	557
Short-Term Investment Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	103	63
Insurance Contracts [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	115	119
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Asset	119	142
Purchases, sales and settlements, net	7	(15)
Realized gains/(losses)	(11)	(15)
Unrealized gains/(losses)		7
Fair value at December 31, Asset	115	119
Event Driven Hedge Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	72	71
Cash and Cash Equivalents [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	106	76
Other Plan Assets [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 18	20
United States Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Target allocation percentage of assets	13.00%
International Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Target allocation percentage of assets	16.00%
Global Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Target allocation percentage of assets	14.00%
Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Target allocation percentage of assets	50.00%
Fair Value Level 1 [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 1,665	1,981
Fair Value Level 1 [Member] | Equity Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	785	1,115
Fair Value Level 1 [Member] | Equity Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	521	446
Fair Value Level 1 [Member] | Fixed Income Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	249	340
Fair Value Level 1 [Member] | Cash and Cash Equivalents [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	106	76
Fair Value Level 1 [Member] | Other Plan Assets [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	4	4
Fair Value Level 2 [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	3,986	4,078
Fair Value Level 2 [Member] | Equity Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	1,174	1,113
Fair Value Level 2 [Member] | Fixed Income Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	724	777
Fair Value Level 2 [Member] | Corporate Debt Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	1,382	1,481
Fair Value Level 2 [Member] | U.S. Treasury and Agency Securities [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	517	557
Fair Value Level 2 [Member] | Short-Term Investment Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	103	63
Fair Value Level 2 [Member] | Event Driven Hedge Funds [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	72	71
Fair Value Level 2 [Member] | Other Plan Assets [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	14	16
Fair Value Level 3 [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	364	446
Fair Value Level 3 [Member] | Venture Capital and Limited Partnerships [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	249	327
Fair Value Level 3 [Member] | Insurance Contracts [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Total plan assets at fair value	$ 115	$ 119