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EMPLOYEE BENEFIT PLANS - PLAN ASSETS (Details) - Qualified Defined Benefit [Member] - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset allocations | 100.00% | 100.00% |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 1,737,000,000 | $ 1,917,000,000 | $ 1,769,000,000
Level 2 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 1,652,000,000 | $ 1,917,000,000 |
Equity funds [Member] | U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset allocations | 28.00% | 33.00% |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Equities, Range Minimum | 21.00% |  |
Equities, Range Maximum | 33.00% |  |
Equity funds [Member] | U.S. | Level 2 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 491,000,000 | $ 634,000,000 |
Equity funds [Member] | Non-U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset allocations | 12.00% | 14.00% |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Equities, Range Minimum | 7.00% |  |
Equities, Range Maximum | 17.00% |  |
Equity funds [Member] | Non-U.S. [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 208,000,000 | $ 272,000,000 |
Credit bond index fund [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 953,000,000 | $ 190,000,000 |
Fixed Income Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset allocations | 55.00% | 53.00% |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Equities, Range Minimum | 48.00% |  |
Equities, Range Maximum | 67.00% |  |
Government and credit bond index funds [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 0 | $ 821,000,000 |
Real Estate [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset allocations | 5.00% | 0.00% |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Equities, Range Minimum | 0.00% |  |
Equities, Range Maximum | 8.00% |  |
Real Estate [Member] | Level 3 [Member] |  |  |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |  |  |
Plan Assets | $ 85,000,000 | $ 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 0 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings and Other Comprehensive Income (Loss) | 5 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) | 80 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | 0.0 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 85,000,000 |  |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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