SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Short-term borrowings
Short-term borrowings outstanding	$ 18.2		$ 25.6
Commercial paper
Short-term borrowings
Short-term borrowings outstanding	18.2		25.6
Average interest rate (as a percent)	0.13%		0.14%
Average amount of short-term borrowings outstanding	$ 9.1	$ 57.8