CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 6,451	$ 21,089
Accounts receivable, net	270,395	328,675
Accounts receivable from affiliates	57,246	19,136
Investments in utility money pool arrangement	0	72,000
Accrued unbilled revenues	217,079	270,917
Inventories	206,517	238,007
Regulatory assets	158,129	150,163
Deferred income taxes	75,389	87,267
Derivative instruments	5,448	6,576
Prepayments and other	27,993	32,629
Total current assets	1,024,647	1,226,459
Property, plant and equipment, net	11,125,478	10,742,397
Other assets
Regulatory assets	833,950	826,037
Derivative instruments	6,049	6,905
Other	48,813	52,520
Total other assets	888,812	885,462
Total assets	13,038,937	12,854,318
Current liabilities
Current portion of long-term debt	7,631	282,143
Short-term Debt	256,800	0
Accounts payable	345,356	451,243
Accounts payable to affiliates	31,162	45,902
Regulatory liabilities	125,380	79,499
Taxes accrued	85,180	154,194
Accrued interest	48,617	48,492
Dividends payable to parent	96,391	65,134
Derivative instruments	5,270	6,734
Other	71,492	89,571
Total current liabilities	1,073,279	1,222,912
Deferred credits and other liabilities
Deferred income taxes	2,274,042	2,206,179
Deferred investment tax credits	37,761	39,230
Regulatory liabilities	453,273	424,690
Asset retirement obligations	97,862	60,398
Derivative instruments	20,798	23,366
Customer advances	243,103	251,062
Pension and employee benefit obligations	130,358	167,127
Other	67,490	66,855
Total deferred credits and other liabilities	3,324,687	3,238,907
Commitments and contingencies
Capitalization
Long-term debt	3,885,939	3,590,500
Common stock — 100 shares authorized at $0.01 par value; 100 shares outstanding at June 30, 2014 and Dec. 31, 2013, respectively	0	0
Additional paid in capital	3,476,776	3,441,290
Retained earnings	1,301,829	1,384,047
Accumulated other comprehensive loss	(23,573)	(23,338)
Total common stockholder’s equity	4,755,032	4,801,999
Total liabilities and equity	$ 13,038,937	$ 12,854,318