Borrowings and Other Financing Instruments (Tables)

3 Months Ended

Mar. 31, 2022

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

As of March 31, 2022, NSP-Wisconsin had the following committed revolving credit facility available (in millions of dollars):

Credit Facility (a)		Outstanding (b)		Available
$	150	$	—	$	150

(a)Expires in June 2024.

(b)Includes outstanding commercial paper.

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money pool borrowings for NSP-Wisconsin:

(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2022			Year Ended Dec. 31, 2021
Borrowing limit	$	150		$	150
Amount outstanding at period end	48			—
Average amount outstanding	19			16
Maximum amount outstanding	65			78
Weighted average interest rate, computed on a daily basis	0.13		%	0.05		%
Weighted average interest rate at period end	0.19			N/A

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Commercial paper outstanding for NSP-Wisconsin:

(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2022			Year Ended Dec. 31, 2021
Borrowing limit	$	150		$	150
Amount outstanding at period end	—			83
Average amount outstanding	48			3
Maximum amount outstanding	123			83
Weighted average interest rate, computed on a daily basis	0.23		%	0.18		%
Weighted average interest rate at period end	N/A			0.21