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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - FAIR VALUE OF PLAN ASSETS (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | $ 386 | $ 384 | $ 436
Equity securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Target allocation of plan assets (as a percent) | 65.00% |  |
Equity securities | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | $ 178 | 169 |
Debt securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Target allocation of plan assets (as a percent) | 35.00% |  |
Pension Plan Assets - Gross | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | $ 389 | 385 |
U.S. government securities | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 13 | 16 |
Corporate bonds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 85 | 78 |
Common/collective trusts | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 18 | 12 |
Bond funds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 18 | 33 |
Blend funds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 48 | 48 |
Other | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 29 | 29 |
Net Payables | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 3 | 1 |
Level 1 | Equity securities | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 178 | 169 |
Level 1 | Pension Plan Assets - Gross | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 257 | 266 |
Level 1 | U.S. government securities | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 13 | 16 |
Level 1 | Bond funds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 18 | 33 |
Level 1 | Blend funds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 48 | 48 |
Level 2 | Pension Plan Assets - Gross | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 132 | 119 |
Level 2 | Corporate bonds | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 85 | 78 |
Level 2 | Common/collective trusts | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | 18 | 12 |
Level 2 | Other | Pension Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets | $ 29 | $ 29 |

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