DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2010	Mar. 31, 2015	Dec. 31, 2014
Foreign exchange options
Derivatives
Term of contract	5 years
Interest rate swaps and caps
Derivatives
Notional amount of derivative assets		$ 2,600,000,000	$ 2,450,000,000
Notional amount of derivative liabilities		2,600,000,000	2,400,000,000
Short-term foreign exchange contracts
Derivatives
Notional Amount		1,040,000,000	680,600,000
Fair value of derivative asset		13,300,000	8,100,000
Fair value of derivative liability		$ 13,100,000	$ 9,200,000