BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 6.5	$ 16.2
Accounts receivable, net	110.8	92.7
Accounts receivable from affiliates	11.1	4.2
Accrued unbilled revenues	118.3	115.1
Inventories	33.2	31.0
Regulatory assets	75.4	20.0
Derivative instruments	14.3	15.0
Prepaid taxes	17.5	0.8
Prepayments and other	19.9	21.4
Total current assets	407.0	316.4
Property, plant and equipment, net	7,368.5	6,631.6
Assets, Noncurrent [Abstract]
Regulatory Assets, Noncurrent	362.2	364.0
Derivative Instruments and Hedges, Noncurrent	10.3	12.6
Operating Lease, Right-of-Use Asset	497.1	522.4
Other Assets, Noncurrent	3.4	3.9
Total other assets	873.0	902.9
Total assets	8,648.5	7,850.9
Current liabilities
Borrowings Payable Under Utility Money Pool Arrangement	10.0	0.0
Accounts payable	230.6	168.1
Accounts payable to affiliates	16.7	20.4
Regulatory liabilities	77.2	118.1
Taxes accrued	50.9	40.4
Accrued interest	33.4	26.2
Dividends payable to parent	55.0	46.3
Derivative instruments	3.6	3.7
Operating lease liabilities	27.8	26.9
Other	25.2	30.7
Liabilities, Current, Total	530.4	480.8
Deferred credits and other liabilities
Deferred income taxes	719.4	671.8
Regulatory liabilities	715.8	732.3
Asset retirement obligations	80.0	77.3
Derivative instruments	10.1	12.8
Pension and employee benefit obligations	51.9	67.0
Operating lease liabilities	469.3	495.3
Other	12.1	9.4
Total deferred credits and other liabilities	2,058.6	2,065.9
Capitalization
Long-term debt	$ 2,763.7	$ 2,419.7
Common Stock, Shares Authorized	200	200
Common Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Shares, Outstanding	100	100
Common Stock, Value, Issued	$ 0.0	$ 0.0
Additional paid in capital	2,786.9	2,350.9
Retained earnings	510.2	535.0
Accumulated other comprehensive loss	(1.3)	(1.4)
Total common stockholder's equity	3,295.8	2,884.5
Total liabilities and equity	$ 8,648.5	$ 7,850.9