Borrowings and Other Financing Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

At Sept. 30, 2016, NSP-Wisconsin had the following committed credit facility available (in millions of dollars):

Credit Facility (a)		Drawn(b)		Available
$	150	$	4	$	146

^(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 Sept. 30, 2016			Year Ended Dec. 31, 2015
Borrowing limit	$	150		$	150
Amount outstanding at period end	4			10
Average amount outstanding	6			39
Maximum amount outstanding	23			122
Weighted average interest rate, computed on a daily basis	0.60		%	0.44		%
Weighted average interest rate at period end	0.60			0.70

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)	Sept. 30, 2016			Dec. 31, 2015
Notes payable to affiliates	$	0.5		$	0.5
Weighted average interest rate at period end	0.77		%	0.87		%