INCOME TAXES - Schedule of Gross Deductible Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deductible temporary differences, unused tax losses, and unused tax credits	$ 715	$ 425
United States | Net operating losses
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deductible temporary differences, unused tax losses, and unused tax credits	287	74
Foreign countries | Net operating losses
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deductible temporary differences, unused tax losses, and unused tax credits	$ 428	$ 351