CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 328.1	$ 33.4
Accounts receivable, net	294.2	310.3
Accounts receivable from affiliates	13.6	80.8
Accrued unbilled revenues	228.8	313.5
Inventories	188.1	197.4
Regulatory assets	70.5	120.6
Derivative instruments	10.0	42.6
Prepayments and other	39.3	23.8
Total current assets	1,172.6	1,122.4
Property, plant and equipment, net	15,786.4	15,120.0
Other assets
Regulatory assets	1,063.3	1,010.7
Derivative instruments	0.7	1.2
Operating lease right-of-use assets	594.4	0.0
Other	248.9	37.2
Total other assets	1,907.3	1,049.1
Total assets	18,866.3	17,291.5
Current liabilities
Current portion of long-term debt	0.0	406.2
Short-term debt	0.0	307.0
Accounts payable	514.0	503.4
Accounts payable to affiliates	44.5	46.0
Regulatory liabilities	116.5	67.3
Taxes accrued	159.7	202.0
Accrued interest	36.0	43.2
Dividends payable to parent	97.3	91.5
Derivative instruments	11.7	34.6
Other	179.5	101.5
Total current liabilities	1,159.2	1,802.7
Deferred credits and other liabilities
Deferred income taxes	1,772.0	1,719.3
Deferred investment tax credits	23.5	25.3
Regulatory liabilities	2,022.3	2,021.5
Asset retirement obligations	350.1	338.7
Derivative instruments	54.8	0.6
Customer advances	172.8	168.1
Pension and employee benefit obligations	230.5	275.3
Operating lease liabilities	539.5	0.0
Other	152.0	50.4
Total deferred credits and other liabilities	5,317.5	4,599.2
Capitalization
Long-term debt	5,384.0	4,591.4
Common stock — 100 shares authorized at $0.01 par value; 100 shares outstanding at Sept. 30, 2019 and Dec. 31, 2018, respectively	0.0	0.0
Additional paid in capital	4,903.3	4,340.5
Retained earnings	2,126.9	1,983.2
Accumulated other comprehensive loss	(24.6)	(25.5)
Total common stockholder’s equity	7,005.6	6,298.2
Total liabilities and equity	$ 18,866.3	$ 17,291.5