CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and Cash Equivalents			$ 6.0	$ 5.2
Accounts Receivable, Net			62.0	55.1
Accrued Revenue			50.9	50.0
Exchange Gas Receivable			4.9	6.1
Gas Inventory			0.6	0.8
Materials and Supplies			8.5	7.9
Prepayments and Other			6.4	5.8
Total Current Assets			139.3	130.9
Utility Plant:
Gas			920.2	837.7
Electric			575.9	529.7
Common			64.1	62.7
Construction Work in Progress			34.8	37.4
Utility Plant			1,595.0	1,467.5
Less: Accumulated Depreciation			401.8	356.0
Net Utility Plant			1,193.2	1,111.5
Other Noncurrent Assets:
Regulatory Assets			127.4	112.0
Operating Lease Right of Use Assets			5.2	4.0
Other Assets			12.8	12.4
Total Other Noncurrent Assets			145.4	128.4
TOTAL ASSETS			1,477.9	1,370.8
Current Liabilities:
Accounts Payable			33.2	37.6
Short-Term Debt			54.7	58.6
Long-Term Debt, Current Portion	[1]		8.5	19.5
Regulatory Liabilities			5.5	7.4
Energy Supply Obligations			10.4	10.5
Environmental Obligations			0.3	0.6
Other Current Liabilities			23.5	25.6
Total Current Liabilities			136.1	159.8
Noncurrent Liabilities:
Retirement Benefit Obligations			162.3	141.9
Deferred Income Taxes, net			109.0	103.6
Cost of Removal Obligations			105.2	96.0
Regulatory Liabilities			44.3	46.6
Environmental Obligations			1.8	2.1
Other Noncurrent Liabilities			6.9	6.5
Total Noncurrent Liabilities			429.5	396.7
Capitalization:
Long-Term Debt, Less Current Portion			523.1	437.5
Stockholders' Equity:
Common Equity (Outstanding 15,012,310 and 14,930,170 Shares)			285.3	282.5
Retained Earnings			103.7	94.1
Total Common Stock Equity			389.0	376.6
Preferred Stock			0.2	0.2
Total Stockholders' Equity			389.2	376.8
Total Capitalization			912.3	814.3
Commitments and Contingencies (Note 8)
TOTAL LIABILITIES AND CAPITALIZATION			$ 1,477.9	$ 1,370.8

[1] The Current Portion of Long-Term Debt includes sinking fund payments.