Borrowings and Other Financing Instruments (Tables)

6 Months Ended

Jun. 30, 2014

Borrowings and Other Financing Instruments [Abstract]

Committed Credit Facility Available

At June 30, 2014, PSCo had the following committed credit facility available (in millions of dollars):

Credit Facility (a)		Drawn(b)		Available
$	700.0	$	263.3	$	436.7

^(a)  Credit facility expires in July 2017.

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

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money pool borrowings for PSCo were as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended June 30, 2014			Twelve Months Ended Dec. 31, 2013
Borrowing limit	$	250		$	250
Amount outstanding at period end	—			—
Average amount outstanding	6			0.1
Maximum amount outstanding	70			12
Weighted average interest rate, computed on a daily basis	0.24		%	0.36		%
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 for PSCo was as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended June 30, 2014			Twelve Months Ended Dec. 31, 2013
Borrowing limit	$	700		$	700
Amount outstanding at period end	257			—
Average amount outstanding	127			38
Maximum amount outstanding	261			332
Weighted average interest rate, computed on a daily basis	0.24		%	0.34		%
Weighted average interest rate at period end	0.29			N/A