Borrowings and Other Financing Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Borrowings and Other Financing Instruments [Abstract]

Credit Facilities

At March 31, 2020, NSP-Minnesota had the following committed revolving credit facility available (in millions of dollars):

Credit Facility (a)		Outstanding (b)		Available
$	500	$	10	$	490

^(a)  This credit facility expires in June 2024.

^(b) 

Includes outstanding commercial paper and letters of credit.

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money pool borrowings for NSP-Minnesota were as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2020			Year Ended Dec. 31, 2019
Borrowing limit	$	250		$	250
Amount outstanding at period end	—			—
Average amount outstanding	10			32
Maximum amount outstanding	116			250
Weighted average interest rate, computed on a daily basis	1.58		%	2.05		%
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 NSP-Minnesota was as follows:

(Amounts in Millions, Except Interest Rates)	Three Months Ended March 31, 2020			Year Ended Dec. 31, 2019
Borrowing limit	$	500		$	500
Amount outstanding at period end	—			30
Average amount outstanding	27			71
Maximum amount outstanding	124			317
Weighted average interest rate, computed on a daily basis	1.77		%	2.59		%
Weighted average interest rate at period end	N/A			2.05

Bilateral Credit Agreement | Letter of Credit

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

As of March 31, 2020, NSP-Minnesota’s outstanding letters of credit under the Bilateral Credit Agreement were as follows:

(Millions of Dollars)	Limit		Amount Outstanding		Available
NSP-Minnesota	$	75	$	26	$	49