Borrowings and Other Financing Instruments (Tables)

At March 31, 2018, PSCo 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 PSCo were as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2018			Year Ended Dec. 31, 2017
Borrowing limit	$	250		$	250
Amount outstanding at period end	48			—
Average amount outstanding	12			—
Maximum amount outstanding	97			20
Weighted average interest rate, computed on a daily basis	1.64		%	0.92		%
Weighted average interest rate at period end	1.64			N/A

Commercial paper outstanding for PSCo was as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2018			Year Ended Dec. 31, 2017
Borrowing limit	$	700		$	700
Amount outstanding at period end	95			—
Average amount outstanding	50			54
Maximum amount outstanding	151			268
Weighted average interest rate, computed on a daily basis	1.82		%	1.08		%
Weighted average interest rate at period end	2.28			N/A