Borrowings and Other Financing Instruments (Tables)

As of March 31, 2018, SPS had the following committed credit facility available (in millions of dollars):


^(a)	This credit facility expires in June 2021.


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

Money pool borrowings for SPS were as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2018			Year Ended Dec. 31, 2017
Borrowing limit	$	100		$	100
Amount outstanding at period end	—			—
Average amount outstanding	—			13
Maximum amount outstanding	1			100
Weighted average interest rate, computed on a daily basis	1.64		%	1.12		%
Weighted average interest rate at period end	N/A			N/A

Commercial paper outstanding for SPS was as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2018			Year Ended Dec. 31, 2017
Borrowing limit	$	400		$	400
Amount outstanding at period end	10			—
Average amount outstanding	4			69
Maximum amount outstanding	28			176
Weighted average interest rate, computed on a daily basis	1.86		%	1.13		%
Weighted average interest rate at period end	2.25			N/A