Borrowings and Other Financing Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

As of Sept. 30, 2022, SPS had the following committed revolving credit facility available (in millions of dollars):

Credit Facility (a)		Drawn (b)		Available
$	500	$	2	$	498

(a)Expires in September 2027.

(b)Includes outstanding letters of credit.

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money pool borrowings for SPS:

(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2022			Year Ended Dec. 31, 2021
Borrowing limit	$	100		$	100
Amount outstanding at period end	—			91
Average amount outstanding	—			51
Maximum amount outstanding	4			100
Weighted average interest rate, computed on a daily basis	2.27		%	0.05		%
Weighted average interest rate at period end	N/A			0.05

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Commercial paper outstanding for SPS:

(Amounts in Millions, Except Interest Rates)	Three Months Ended Sept. 30, 2022		Year Ended Dec. 31, 2021
Borrowing limit	$	500	$	500
Amount outstanding at period end	—		137
Average amount outstanding	—		63
Maximum amount outstanding	—		342
Weighted average interest rate, computed on a daily basis	N/A		0.21		%
Weighted average interest rate at period end	N/A		0.26