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Borrowings and Other Financing Instruments
6 Months Ended
Jun. 30, 2019
Debt Disclosure [Abstract]  
Borrowings and Other Financing Instruments
Borrowings and Other Financing Instruments
NSP-Wisconsin meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under its credit facility.
Commercial Paper Commercial paper outstanding for NSP-Wisconsin was as follows:
(Amounts in Millions, Except Interest Rates)
 
Three Months Ended June 30, 2019
 
Year Ended Dec. 31, 2018
Borrowing limit
 
$
150

 
$
150

Amount outstanding at period end
 
50

 
51

Average amount outstanding
 
39

 
28

Maximum amount outstanding
 
59

 
103

Weighted average interest rate, computed on a daily basis
 
2.63
%
 
2.31
%
Weighted average interest rate at period end
 
2.62

 
2.89


Letters of Credit — NSP-Wisconsin uses letters of credit, generally with terms of one year, to provide financial guarantees for certain operating obligations. At June 30, 2019 and Dec. 31, 2018, there were no letters of credit outstanding.
Credit Facility In order to use its commercial paper program to fulfill short-term funding needs, NSP-Wisconsin must have a revolving credit facility in place at least equal to the amount of its commercial paper borrowing limit and cannot issue commercial paper in an aggregate amount exceeding available capacity under this credit facility. The line of credit provides short-term financing in the form of notes payable to banks, letters of credit and back-up support for commercial paper borrowings.
As of June 30, 2019, NSP-Wisconsin had the following committed credit facility available (in millions of dollars):
Credit Facility (a)
 
Outstanding (b)
 
Available
$
150

 
$
50

 
$
100

(a) 
This credit facility expires in June 2024.
(b) 
Includes outstanding commercial paper.
All credit facility bank borrowings, outstanding letters of credit and outstanding commercial paper reduce the available capacity under the credit facility. NSP-Wisconsin had no direct advances on the credit facility outstanding at June 30, 2019 and Dec. 31, 2018.
Other Short-Term Borrowings The following table presents the notes payable of Clearwater Investments, Inc., a NSP-Wisconsin subsidiary, to Xcel Energy Inc.:
(Amounts in Millions, Except Interest Rates)
 
June 30, 2019
 
Dec. 31, 2018
Notes payable to affiliates
 
$

 
$
0.6

Weighted average interest rate at period end
 
N/A

 
2.89
%