Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Average fixed interest rate related to the group of interest rate derivatives.

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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.

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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FAIR VALUE MEASUREMENTS (Details) - USD ($)	3 Months Ended		6 Months Ended
FAIR VALUE MEASUREMENTS (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Interest rate derivatives
Net realized gain (loss) related to the interest rate swaps included in financial charges and other	$ (2,000,000)	$ 0	$ (2,000,000)	$ 1,000,000
Interest rate swaps \| Term loan \| 2013 Term Loan Facility due 2022
Interest rate derivatives
Weighted average fixed interest rate	3.26%		3.26%		3.26%
Hedges of cash flows \| Recurring fair value measurement \| Level 2 \| Interest rate swaps
Interest rate derivatives
Fair value of derivative liability, gross	$ 19,000,000		$ 19,000,000		$ 6,000,000
Fair value of derivative liability, net	19,000,000		19,000,000		6,000,000
Estimate of fair value measurement \| Level 2
Interest rate derivatives
Fair value of debt	$ 2,223,000,000		$ 2,223,000,000		$ 2,111,000,000