Short-Term Debt	9 Months Ended
Sep. 30, 2013
Debt Disclosure [Abstract]
Short-Term Debt	Note 6 – Short-Term Debt In March 2012, Southwest replaced the existing $300 million credit facility that was to expire in May 2012 with a $300 million facility that is scheduled to expire in March 2017. Of the $300 million available under the facility, $150 million was designated by management for working capital purposes. Southwest had $33 million in short-term borrowings outstanding on the credit facility at September 30, 2013 and no outstanding short-term borrowings at December 31, 2012. The weighted-average interest rate on these borrowings was 1.62% at September 30, 2013.

Short-Term Debt

9 Months Ended

Sep. 30, 2013

Note 6 – Short-Term Debt

In March 2012, Southwest replaced the existing $300 million credit facility that was to expire in May 2012 with a $300 million facility that is scheduled to expire in March 2017. Of the $300 million available under the facility, $150 million was designated by management for working capital purposes. Southwest had $33 million in short-term borrowings outstanding on the credit facility at September 30, 2013 and no outstanding short-term borrowings at December 31, 2012. The weighted-average interest rate on these borrowings was 1.62% at September 30, 2013.