SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to deferred income taxes	$ 1,690	$ 1,676
Tax benefit recognition, measurement percentage (greater than)	50.00%
Minimum period to classify uncertain tax position liabilities as long term liabilities	1 year
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to deferred income taxes			$ 1,209