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FAIR VALUE OF FINANCIAL INSTRUMENTS (Debt Narrative) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Estimated Fair Value
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 822	$ 961
Carrying Value
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 799	$ 949

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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.

+ References

No definition available.

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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- Details

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