Borrowings and Other Financing Instruments (Tables)
$ in Millions

9 Months Ended

Sep. 30, 2023

USD ($)

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

At Sept. 30, 2023, NSP-Minnesota had the following committed revolving credit facility available (in millions of dollars):

Credit Facility (a)		Drawn (b)		Available
$	700	$	15	$	685

(a)Expires in September 2027.

(b)Includes outstanding commercial paper and letters of credit.

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	$	250	$	250
Amount outstanding at period end	—		—
Average amount outstanding	—		—
Maximum amount outstanding	—		4
Weighted average interest rate, computed on a daily basis	N/A		3.87		%
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	$	700	$	700
Amount outstanding at period end	—		207
Average amount outstanding	—		21
Maximum amount outstanding	—		290
Weighted average interest rate, computed on a daily basis	N/A		4.14		%
Weighted average interest rate at period end	N/A		4.64

Series Due May 15, 2053 | Bonds [Member]

Borrowings and Other Financing Instruments [Abstract]

Debt Instrument, Face Amount

$ 800