BENEFIT PLANS - Costs of Retirement Plans (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2018 |
Mar. 31, 2017 |
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Defined Contribution Plan, Cost | $ 11 | $ 11 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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