Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Property, plant and equipment	$ 20,575	$ 19,954
Accumulated depreciation	(5,184)	(4,962)
Property, plant and equipment, net	15,391	14,992
Current assets:
Cash and cash equivalents	64	75
Restricted funds	28	20
Accounts receivable, net	288	269
Unbilled revenues	236	263
Materials and supplies	41	39
Other	151	118
Total current assets	808	784
Regulatory and other long-term assets:
Regulatory assets	1,324	1,289
Goodwill	1,373	1,345
Other	70	72
Total regulatory and other long-term assets	2,767	2,706
TOTAL ASSETS	18,966	18,482
Capitalization:
Common stock ($0.01 par value, 500,000,000 shares authorized, 182,342,528 and 181,798,555 shares issued, respectively)	2	2
Paid-in-capital	6,416	6,388
Accumulated deficit	(702)	(873)
Accumulated other comprehensive loss	(85)	(86)
Treasury stock, at cost (4,064,010 and 3,701,867 shares, respectively)	(247)	(213)
Total common stockholders' equity	5,384	5,218
Long-term debt	5,650	5,749
Redeemable preferred stock at redemption value	9	10
Total long-term debt	5,659	5,759
Total capitalization	11,043	10,977
Current liabilities:
Short-term debt	1,117	849
Current portion of long-term debt	686	574
Accounts payable	134	154
Accrued liabilities	490	609
Taxes accrued	47	31
Interest accrued	62	63
Other	125	112
Total current liabilities	2,661	2,392
Regulatory and other long-term liabilities:
Advances for construction	291	300
Deferred income taxes, net	2,723	2,596
Deferred investment tax credits	23	23
Regulatory liabilities	410	403
Accrued pension expense	422	419
Accrued postretirement benefit expense	85	87
Other	70	67
Total regulatory and other long-term liabilities	4,024	3,895
Contributions in aid of construction	1,238	1,218
Commitments and contingencies (see Note 9)
TOTAL CAPITALIZATION AND LIABILITIES	$ 18,966	$ 18,482