SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Short-term borrowings
Short-term borrowings outstanding	$ 60.4		$ 25.6
Commercial paper
Short-term borrowings
Short-term borrowings outstanding	60.4		25.6
Average interest rate (as a percent)	0.21%		0.14%
Average amount of short-term borrowings outstanding	$ 18.5	$ 70.8