SHORT-TERM DEBT AND LINES OF CREDIT (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 30, 2013
Short-term borrowings
Short-term borrowings outstanding	$ 25.6	$ 95.4
Commercial paper
Short-term borrowings
Short-term borrowings outstanding	25.6	95.4	173.7
Average interest rate (as a percent)	0.14%	0.24%	0.26%
Average amount of short-term borrowings outstanding	80.8	150.2	57.5
Short-term notes payable
Short-term borrowings
Short-term borrowings outstanding				200.0
Average amount of short-term borrowings outstanding	$ 130.4	$ 0	$ 3.6