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EMPLOYEE BENEFIT PLANS (Tables) - Qualified Defined Benefit [Member] | 12 Months Ended
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Dec. 31, 2016
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:
| 2016 |  | 2015
Discount rates (a) | 4.29% to 4.50% |  | 4.55% to 4.69%
Rate of compensation increases(a) | 2.12% to 2.59% |  | 2.06% to 2.65%
(a) | Varies by plan and related work group.
Weighted average assumptions used to determine net periodic benefit cost:
| 2016 |  | 2015 |  | 2014
Discount rates(a) | 4.55% to 4.69% |  | 4.20% |  | 4.85%
Expected return on plan assets(a) | 6.00% to 6.50% |  | 6.50% |  | 6.75%
Rate of compensation increases(a) | 2.06% to 2.65% |  | 2.85% to 3.91% |  | 2.90% to 3.93%
(a) | Varies by plan and related work group.
Schedule of Allocation of Plan Assets [Table Text Block] | The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows:
| Target |  | 2016 |  | 2015
Asset category: |  |  |  |  |
Domestic equity securities | 22% - 33% |  | 30 | % |  | 28 | %
Non-U.S. equity securities | 9% - 16% |  | 12 | % |  | 12 | %
Fixed income securities | 48% - 67% |  | 53 | % |  | 55 | %
Real estate | 0% - 8% |  | 5 | % |  | 5 | %
Plan assets |  |  | 100 | % |  | 100 | %
Plan asset by fund category (in millions):
| 2016 |  | 2015 |  | Fair Value Hierarchy
Fund type: |  |  |  |  |
U.S. equity market fund | $ | 545 |  |  | $ | 491 |  |  | 1
Non-U.S. equity fund | 218 |  |  | 208 |  |  | 1
Credit bond index fund | 992 |  |  | 953 |  |  | 1
Plan assets in common commingled trusts | $ | 1,755 |  |  | $ | 1,652 |  |  |
Real estate | 91 |  |  | 85 |  |  | (a)
Total plan assets | $ | 1,846 |  |  | $ | 1,737 |  |  |
Schedule of Net Funded Status [Table Text Block] | The following table sets forth the status of the qualified defined-benefit pension plans (in millions):
| 2016 |  | 2015
Projected benefit obligation ("PBO") |  |  |
Beginning of year | $ | 1,898 |  |  | $ | 2,050 |
Service cost | 37 |  |  | 41 |
Interest cost | 73 |  |  | 84 |
Plan settlement | — |  |  | (62 | )
Actuarial (gain) loss | 104 |  |  | (140 | )
Benefits paid | (69 | ) |  | (75 | )
End of year | $ | 2,043 |  |  | $ | 1,898 |
Plan assets at fair value |  |  |  |  |
Beginning of year | $ | 1,737 |  |  | $ | 1,917 |
Actual return on plan assets | 178 |  |  | (43 | )
Employer contributions | — |  |  | — |
Plan settlement | — |  |  | (62 | )
Benefits paid | (69 | ) |  | (75 | )
End of year | $ | 1,846 |  |  | $ | 1,737 |
Funded status (unfunded) | $ | (197 | ) |  | $ | (161 | )
Percent funded | 90 | % |  | 92 | %
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] | The amounts recognized in the consolidated balance sheets (in millions):
| 2016 |  | 2015
Accrued benefit liability-long term | $ | 225 |  |  | $ | 173 |
Plan assets-long term (within Other noncurrent assets) | (28 | ) |  | (12 | )
Total liability recognized | $ | 197 |  |  | $ | 161 |
The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):
| 2016 |  | 2015
Prior service credit | $ | (10 | ) |  | $ | (11 | )
Net loss | 509 |  |  | 499 |
Amount recognized in AOCL (pretax) | $ | 499 |  |  | $ | 488 |
Schedule of Net Benefit Costs [Table Text Block] | Net pension expense for the qualified defined-benefit plans included the following components (in millions):
| 2016 |  | 2015 |  | 2014
Service cost | $ | 37 |  |  | $ | 41 |  |  | $ | 33 |
Interest cost | 73 |  |  | 84 |  |  | 81 |
Expected return on assets | (108 | ) |  | (122 | ) |  | (117 | )
Amortization of prior service credit | (1 | ) |  | (1 | ) |  | (1 | )
Recognized actuarial loss | 25 |  |  | 26 |  |  | 13 |
Settlement expense (special item) | — |  |  | 14 |  |  | — |
Net pension expense | $ | 26 |  |  | $ | 42 |  |  | $ | 9 |
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):
| Total
2017 | $ | 85 |
2018 | 93 |
2019 | 96 |
2020 | 109 |
2021 | 109 |
2022– 2026 | 652 |

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