Borrowings and Other Financing Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

At Dec. 31, 2016, NSP-Wisconsin had the following committed credit facility available (in millions):

Credit Facility (a)		Drawn(b)		Available
$	150	$	60	$	90

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

^(b)  Includes outstanding commercial paper.

A

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-term Borrowings

Commercial Paper — NSP-Wisconsin meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under its credit facility. Commercial paper outstanding for NSP-Wisconsin was as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended Dec. 31, 2016
Borrowing limit	$	150
Amount outstanding at period end	60
Average amount outstanding	32
Maximum amount outstanding	64
Weighted average interest rate, computed on a daily basis	0.73		%
Weighted average interest rate at period end	0.95

(Amounts in Millions, Except Interest Rates)	Twelve Months Ended Dec. 31, 2016			Twelve Months Ended Dec. 31, 2015			Twelve Months Ended Dec. 31, 2014
Borrowing limit	$	150		$	150		$	150
Amount outstanding at period end	60			10			78
Average amount outstanding	15			39			46
Maximum amount outstanding	64			122			101
Weighted average interest rate, computed on a daily basis	0.69		%	0.44		%	0.27		%
Weighted average interest rate at period end	0.95			0.70			0.55

Notes Payable, Other Payables

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)	Dec. 31, 2016			Dec. 31, 2015
Notes payable to affiliates	$	0.5		$	0.5
Weighted average interest rate	0.95		%	0.87		%