EQUITY (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2014
Dividends declared per share of stock		$ 1.20	$ 0.84	$ 0.00
Preferred Stock, Shares Authorized		50.0			50.0
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Common stock authorized and available for issuance		197.4
Stock Repurchase Program, Authorized Amount		$ 20
Common Stock, Dividends, Declared, Annualized Basis		$ 1.20	$ 0.84
Dividend Declared [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.35
Common Stock, Dividends, Declared, Annualized Basis	$ 1.40