STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016	Apr. 30, 2018
Class of Stock [Line Items]
Preferred Stock, Capital Shares Reserved for Future Issuance	50,000,000
Preferred Stock, Shares Outstanding	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	2,010,000,000
Stock Repurchase Program, Authorized Amount	$ 300.0		$ 700.0
Common Stock
Class of Stock [Line Items]
Common Stock, Voting Rights	1
Common Class A [Member]
Class of Stock [Line Items]
Common Stock, Voting Rights		1
Stock Repurchased During Period, Shares	3,252,886
Stock Repurchased During Period, Value	$ 10.0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	290,000,000
Common Class B [Member]
Class of Stock [Line Items]
Common Stock, Voting Rights		150