FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Nonrecurring
Fair value of assets and liabilities measured on recurring basis
Long-lived assets held for sale	$ 394	$ 387
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Long-lived assets held for sale	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Long-lived assets held for sale	394	387
Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair value of assets and liabilities measured on recurring basis
Long-lived assets held for sale	$ 0	$ 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Estimated fair value of debt instrument as percentage of carrying value (percent)	95.10%	106.40%