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EMPLOYEE BENEFIT PLANS (Tables) - Qualified Defined Benefit [Member] | 12 Months Ended
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Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Assumptions Used [Table Text Block] | Weighted average assumptions used to determine benefit obligations:
| 2015 |  | 2014
Discount rates (a) | 4.55% to 4.69% |  | 4.20%
Rate of compensation increases(a) | 2.06% to 2.65% |  | 2.85% to 3.91%
(a) | Varies by plan and related work group.
Weighted average assumptions used to determine net periodic benefit cost:
| 2015 |  | 2014 |  | 2013
Discount rate | 4.20% |  | 4.85% |  | 3.95%
Expected return on plan assets | 6.50% |  | 6.75% |  | 7.25%
Rate of compensation increases(a) | 2.85% to 3.91% |  | 2.90% to 3.93% |  | 3.05% to 4.02%
(a) | Varies by plan and related work group.
Schedule of Allocation of Plan Assets [Table Text Block] | The asset allocation of the funds in the qualified defined-benefit plans, by asset category, is as follows:
| 2015 |  | 2014
Asset category: |  |  |
Domestic equity securities | 28 | % |  | 33 | %
Non-U.S. equity securities | 12 | % |  | 14 | %
Fixed income securities | 55 | % |  | 53 | %
Real estate | 5 | % |  | — | %
Plan assets | 100 | % |  | 100 | %
Plan asset by fund category (in millions):
| 2015 |  | 2014 | Fair Value Hierarchy
Fund type: |  |  |  |
U.S. equity market fund | 491 |  |  | 634 |  | (a)
Non-U.S. equity fund | 208 |  |  | 272 |  | (a)
Credit bond index fund | 953 |  |  | 190 |  | (a)
Government/credit bond index fund | — |  |  | 821 |  | (a)
Plan assets in common commingled trusts | $ | 1,652 |  |  | $ | 1,917 |  |
Real estate | 85 |  |  | — |  | Level 3
Total plan assets | $ | 1,737 |  |  | $ | 1,917 |  |
Target allocations for the primary asset classes based on current funded status are approximately:
Domestic equities: | 21% - 33%
Non-U.S. equities: | 7% - 17%
Fixed income: | 48% - 67%
Real estate: | 0% - 8%
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | Changes in our Level 3 plan assets for the year ended December 31, 2015 included:
Asset Category | December 31, 2014 Balance |  | Net Realized and Unrealized Gains/Losses |  | Net Purchases, Issuances and Settlements |  | Net Transfers Into/(Out of) Level 3 |  | December 31, 2015 Balance
Real Estate | $ | — |  |  | 5 |  |  | 80 |  |  | — |  |  | $ | 85 |
Schedule of Net Funded Status [Table Text Block] | The following table sets forth the status of the qualified defined-benefit pension plans (in millions):
| 2015 |  | 2014
Projected benefit obligation (PBO) |  |  |
Beginning of year | $ | 2,050 |  |  | $ | 1,709 |
Service cost | 41 |  |  | 33 |
Interest cost | 84 |  |  | 81 |
Plan settlement | (62 | ) |  | — |
Actuarial (gain) loss | (140 | ) |  | 298 |
Benefits paid | (75 | ) |  | (71 | )
End of year | $ | 1,898 |  |  | $ | 2,050 |
Plan assets at fair value |  |  |  |  |
Beginning of year | $ | 1,917 |  |  | $ | 1,769 |
Actual return on plan assets | (43 | ) |  | 219 |
Employer contributions | — |  |  | — |
Plan settlement | (62 | ) |  | — |
Benefits paid | (75 | ) |  | (71 | )
End of year | $ | 1,737 |  |  | $ | 1,917 |
Funded status (unfunded) | $ | (161 | ) |  | $ | (133 | )
Percent funded | 92 | % |  | 94 | %
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] | The amounts recognized in the consolidated balance sheets (in millions):
| 2015 |  | 2014
Accrued benefit liability-long term | $ | 173 |  |  | $ | 133 |
Plan assets-long term (within noncurrent Other Assets) | (12 | ) |  | — |
Total liability recognized | $ | 161 |  |  | $ | 133 |
The amounts not yet reflected in net periodic benefit cost and included in AOCL:
| 2015 |  | 2014
Prior service credit | $ | (11 | ) |  | $ | (12 | )
Net loss | 499 |  |  | 514 |
Amount recognized in AOCL (pretax) | $ | 488 |  |  | $ | 502 |
Schedule of Net Benefit Costs [Table Text Block] | Net pension expense for the qualified defined-benefit plans included the following components (in millions):
| 2015 |  | 2014 |  | 2013
Service cost | $ | 41 |  |  | $ | 33 |  |  | $ | 46 |
Interest cost | 84 |  |  | 81 |  |  | 73 |
Expected return on assets | (122 | ) |  | (117 | ) |  | (111 | )
Amortization of prior service cost | (1 | ) |  | (1 | ) |  | (1 | )
Recognized actuarial loss | 26 |  |  | 13 |  |  | 43 |
Settlement expense (special item) | 14 |  |  | — |  |  | — |
Net pension expense | $ | 42 |  |  | $ | 9 |  |  | $ | 50 |
Schedule of Expected Benefit Payments [Table Text Block] | Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions):
2016 | $ | 77 |
2017 | 86 |
2018 | 93 |
2019 | 96 |
2020 | 107 |
2021 - 2024 | 613 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 + Details
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