Borrowings and Other Financing Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

As of March 31, 2019, NSP-Wisconsin had the following committed credit facility available (in millions of dollars):

Credit Facility (a)		Outstanding(b)		Available
$	150	$	49	$	101

^(a)  This credit facility expires in June 2021.

^(b)  Includes outstanding commercial paper.

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Commercial paper outstanding for NSP-Wisconsin was as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2019			Year Ended Dec. 31, 2018
Borrowing limit	$	150		$	150
Amount outstanding at period end	49			51
Average amount outstanding	52			28
Maximum amount outstanding	71			103
Weighted average interest rate, computed on a daily basis	2.71		%	2.31		%
Weighted average interest rate at period end	2.67			2.89

Notes Payable To Affiliates

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

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)	March 31, 2019		Dec. 31, 2018
Notes payable to affiliates	$	—	$	0.6
Weighted average interest rate at period end	N/A		2.89		%