SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (New Accounting Pronouncements) (Details)	Jan. 01, 2019 USD ($)
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease Right Of Use Asset and Lease Payable Obligation	$ 825,000,000
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease Right Of Use Asset and Lease Payable Obligation	925,000,000
Lease with Affiliate [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease Right Of Use Asset and Lease Payable Obligation	600,000,000
Lease with Affiliate [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease Right Of Use Asset and Lease Payable Obligation	$ 650,000,000