Borrowings and Other Financing Instruments (Tables)

6 Months Ended

Jun. 30, 2024

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

As of June 30, 2024, 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 June 30, 2024			Year Ended Dec. 31, 2023
Borrowing limit	$	150		$	150
Amount outstanding at period end	—			—
Average amount outstanding	5			6
Maximum amount outstanding	38			43
Weighted average interest rate, computed on a daily basis	5.33		%	4.98		%
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 June 30, 2024		Year Ended Dec. 31, 2023
Borrowing limit	$	150	$	150
Amount outstanding at period end	—		60
Average amount outstanding	—		15
Maximum amount outstanding	N/A		93
Weighted average interest rate, computed on a daily basis	N/A		4.85		%
Weighted average interest rate at period end	N/A		5.50