Borrowings and Other Financing Instruments (Tables)

9 Months Ended

Sep. 30, 2023

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

As of Sept. 30, 2023, 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 September 2027.

(b)Includes outstanding commercial paper.

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money pool borrowings:

(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2023		Year Ended Dec. 31, 2022
Borrowing limit	$	150	$	150
Amount outstanding at period end	—		—
Average amount outstanding	—		25
Maximum amount outstanding	—		81
Weighted average interest rate, computed on a daily basis	N/A		1.10		%
Weighted average interest rate at period end	N/A		N/A

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Commercial paper outstanding:

(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2023		Year Ended Dec. 31, 2022
Borrowing limit	$	150	$	150
Amount outstanding at period end	—		47
Average amount outstanding	—		18
Maximum amount outstanding	—		123
Weighted average interest rate, computed on a daily basis	N/A		1.03		%
Weighted average interest rate at period end	N/A		4.55