PREFERRED STOCK (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Preferred Stock
Authorized shares	1,000,000
Mandatorily redeemable shares	0
Par value (in dollars per share)	$ 100
Shares outstanding	511,882	511,882
Carrying value	$ 51.2	$ 51.2
Notice period for redemption of preferred stock	30 days
Pre-emptive, subscription, or conversion rights	0
Sinking fund provisions	0
Preferred stock, 5.00% Series
Preferred Stock
Series (as a percent)	5.00%
Shares outstanding	131,916	131,916
Carrying value	13.2	13.2
Preferred stock, 5.04% Series
Preferred Stock
Series (as a percent)	5.04%
Shares outstanding	29,983	29,983
Carrying value	3.0	3.0
Preferred stock, 5.08% Series
Preferred Stock
Series (as a percent)	5.08%
Shares outstanding	49,983	49,983
Carrying value	5.0	5.0
Preferred stock, 6.76% Series
Preferred Stock
Series (as a percent)	6.76%
Shares outstanding	150,000	150,000
Carrying value	15.0	15.0
Preferred stock, 6.88% Series
Preferred Stock
Series (as a percent)	6.88%
Shares outstanding	150,000	150,000
Carrying value	$ 15.0	$ 15.0