Long-Term Debt and Commitments (Tables)

12 Months Ended

Dec. 31, 2013

Long-Term Debt and Commitments [Abstract]

Summary of long term debt

     The following is a summary of long term debt:

Millions of Dollars			Dec. 31,2013	Dec. 31,2012
5.53% Series 2006A Senior Notes
	Due October 5, 2013		$          --	$    50.0
Floating Rate Series 2006A Senior Notes
	Due October 5, 2013 25,000		--	25.0
3.46% Series A Senior Notes
	Due October 7, 2020		30.0	--
4.13% Series B Senior Notes
	Due October 7, 2023		45.0	--
Variable/Fixed Rate Industrial
	Development Revenue Bonds Series 1999 Due November 1, 2014		8.2	8.2
Installment obligations
	Due 2013		--	1.4
Other Borrowings
	Due 2014		--	0.9
		Total	83.2	85.5
Less: Current maturities			8.2	77.0
Long-term debt			$   75.0	$   8.5