CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents		$ 248	$ 147
Accounts receivable, net		837	860
Accrued unbilled revenues		713	755
Inventories		544	548
Regulatory assets		488	464
Derivative instruments		55	87
Prepaid taxes		43	79
Prepayments and other		185	154
Total current assets		3,113	3,094
Property, plant and equipment, net		39,483	36,944
Other assets
Nuclear decommissioning fund and other investments		2,731	2,317
Regulatory assets		2,935	3,326
Derivative instruments		22	34
Operating lease right-of-use assets		1,672	0
Other		492	272
Total other assets		7,852	5,949
Total assets		50,448	45,987
Current liabilities
Current portion of long-term debt		702	406
Short-term debt		595	1,038
Accounts payable		1,294	1,237
Regulatory liabilities	[1]	407	436
Taxes accrued		466	450
Accrued interest		192	174
Dividends payable		212	195
Derivative instruments		38	61
Other		662	463
Total current liabilities		4,568	4,460
Deferred credits and other liabilities
Deferred income taxes		4,509	4,165
Deferred investment tax credits		49	54
Regulatory liabilities	[1]	5,077	5,187
Asset retirement obligations		2,701	2,568
Derivative instruments		175	129
Customer advances		203	199
Pension and employee benefit obligations		785	994
Operating lease liabilities		1,549	0
Other		186	206
Total deferred credits and other liabilities		15,234	13,502
Commitments and contingencies
Capitalization
Long-term debt		17,407	15,803
Common stock — 1,000,000,000 shares authorized of $2.50 par value; 524,539,000 and 514,036,787 shares outstanding at Dec. 31, 2019 and 2018, respectively		1,311	1,285
Additional paid in capital		6,656	6,168
Retained earnings		5,413	4,893
Accumulated other comprehensive loss		(141)	(124)
Total common stockholders’ equity		13,239	12,222
Total liabilities and equity		$ 50,448	$ 45,987

[1] Revenue subject to refund of $28 million and $29 million for 2019 and 2018, respectively, is included in other current liabilities.