Borrowings and Other Financing Instruments Borrowings and Other Financing Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Debt Disclosure [Abstract]

Commercial Paper

Commercial paper outstanding for NSP-Wisconsin was as follows:

(Millions of Dollars, Except Interest Rates)	Three Months Ended Dec. 31, 2020			Year Ended
				2020			2019			2018
Borrowing limit	$	150		$	150		$	150		$	150
Amount outstanding at period end	19			19			65			51
Average amount outstanding	4			30			51			28
Maximum amount outstanding	24			95			93			103
Weighted average interest rate, computed on a daily basis	0.17		%	1.59		%	2.38		%	2.31		%
Weighted average interest rate at period end	0.17			0.17			1.97			2.89

Schedule of Debt To Total Capitalization Ratio

Debt-to-Total Capitalization Ratio (a)				Amount Facility May Be Increased (millions)	Additional Periods for Which a One-Year Extension May Be Requested (b)
2020		2019
46	%	48	%	N/A	1

Credit Facilities

^[1],[2]

(in millions):

Credit Facility (a)		Drawn (b)		Available
$	150	$	19	$	131

(a)This credit facility matures in June 2024.

(b)Includes outstanding commercial paper.

Schedule of Long-Term Debt

Long-term debt obligations for NSP-Wisconsin as of Dec. 31 (millions of dollars):

Financing Instrument	Interest Rate		Maturity Date	2020		2019
City of La Crosse resource recovery bond	6.00	%	Nov 1, 2021	$	19	$	19
First mortgage bonds	3.30		June 15, 2024	100		100
First mortgage bonds	3.30		June 15, 2024	100		100
First mortgage bonds	6.38		Sept. 1, 2038	200		200
First mortgage bonds	3.70		Oct. 1, 2042	100		100
First mortgage bonds	3.75		Dec. 1, 2047	100		100
First mortgage bonds	4.20		Sept. 1, 2048	200		200
First mortgage bonds (a)	3.05		May 1, 2051	100		—
Unamortized discount				(4)		(3)
Unamortized debt issuance cost				(9)		(8)
Current maturities				(19)		—
Total long-term debt				$	887	$	808

(a)2020 financing.

Schedule of Maturities of Long-term Debt

Maturities of long-term debt:

(Millions of Dollars)
2021	$	19
2022	—
2023	—
2024	200
2025	—

Dividend Payment Restrictions

Equity to Total Capitalization Ratio Required Range			Equity to Total Capitalization Ratio Actual
Low		High	2020
52.5	%	N/A	52.8	%

Unrestricted Retained Earnings			Total Capitalization		Limit on Total Capitalization (a)
$	7	million	1,940	million	N/A

(a) NSP-Wisconsin cannot pay annual dividends in excess of forecasted levels if its average equity-to-total capitalization ratio falls below the commission authorized level.

[1] Includes outstanding commercial paper

[2] This credit facility matures in June 2024.