Short-Term Debt (Tables)

12 Months Ended

Dec. 31, 2013

Short-Term Debt (Tables) [Abstract]

Short-term notes payable balances and their corresponding weighted-average interest rates

Short-term notes payable balances and their corresponding weighted-average interest rates as of December 31 consist of:

	2013				2012
			Interest				Interest
Short-Term Debt	Balance		Rate		Balance		Rate
	(Millions of Dollars, except for percentages)
Commercial paper	$	537.4	0.20	%	$	394.6	0.30	%

Commercial paper

The following information relates to commercial paper for the years ended December 31:

	2013			2012
	(Millions of Dollars, except for percentages)
Maximum Short-Term Debt Outstanding	$	594.5		$	669.9
Average Short-Term Debt Outstanding	$	359.1		$	481.6
Weighted-Average Interest Rate	0.25		%	0.28		%