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SIGNIFICANT ACCOUNTING POLICES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Unrealized gains on equity securities, net of tax, in AOCI	$ 70
Change in tax rate, deferred tax liability, provisional income tax benefit	$ 2

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- Definition

Accumulated Other Comprehensive Income Unrealized Gain on Equity Securities Net of Tax

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- Definition

Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit

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