Unaudited Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 57	$ 230
Receivables	930	883
Receivables from affiliated companies	24	0
Notes receivable from affiliated companies	0	0
Inventory	1,366	1,429
Regulatory assets	226	275
Deferred tax assets	326	371
Prepayments and other current assets	97	132
Total current assets	3,026	3,320
Investments and other assets
Nuclear decommissioning trust funds	1,844	1,647
Goodwill	3,655	3,655
Intangibles	30	36
Other	502	468
Total investments and other assets	6,031	5,806
Property, plant and equipment
Cost	36,844	34,797
Cost, variable interest entities	16	16
Accumulated depreciation and amortization	(12,857)	(12,684)
Generation facilities to be retired, net	164	163
Net property, plant and equipment	24,167	22,292
Regulatory assets and deferred debits
Regulatory assets	3,331	3,424
Other	96	89
Total regulatory assets and deferred debits	3,427	3,513
Total assets	36,651	34,931
Current liabilities
Accounts payable	835	968
Payables to affiliated companies	29	0
Notes payable and commercial paper	0	671
Notes payable to affiliated companies	635	0
Taxes accrued	233	56
Interest accrued	187	200
Customer deposits	341	340
Derivative liabilities	209	382
Current maturities of long-term debt	838	961
Other	429	441
Total current liabilities	3,736	4,019
Long-term debt	12,664	11,918
Long-term debt, affiliate	274	273
Deferred credits and other liabilities
Deferred income taxes	2,509	2,193
Investment tax credits	97	103
Accrued pension and other post-retirement benefit costs	1,724	1,625
Asset retirement obligations	2,137	1,265
Regulatory liabilities	2,704	2,727
Other	560	690
Total deferred credits and other liabilities	9,731	8,603
Commitments and contingencies	0	0
Preferred stock of subsidiaries	93	93
Equity
Common stock	0	7,418
Additional paid-in capital	7,465	16
Retained earnings	2,751	2,752
Accumulated other comprehensive loss	(66)	(165)
Total common shareholders' equity	10,150	10,021
Noncontrolling interests	3	4
Total equity	10,153	10,025
Total liabilities and equity	36,651	34,931
PEC [Member]
Current assets
Cash and cash equivalents	19	20
Receivables	486	492
Receivables from affiliated companies	11	1
Inventory	749	770
Deferred tax assets	123	142
Prepayments and other current assets	70	84
Total current assets	1,458	1,509
Investments and other assets
Nuclear decommissioning trust funds	1,223	1,088
Other	216	210
Total investments and other assets	1,439	1,298
Property, plant and equipment
Cost	20,841	19,367
Cost, variable interest entities	16	16
Accumulated depreciation and amortization	(8,025)	(7,991)
Generation facilities to be retired, net	164	163
Net property, plant and equipment	12,996	11,555
Regulatory assets and deferred debits
Regulatory assets	1,762	1,682
Other	30	22
Total regulatory assets and deferred debits	1,792	1,704
Total assets	17,685	16,066
Current liabilities
Accounts payable	369	518
Payables to affiliated companies	52	29
Notes payable and commercial paper	0	188
Notes payable to affiliated companies	243	31
Taxes accrued	85	23
Interest accrued	71	77
Customer deposits	119	116
Derivative liabilities	79	123
Current maturities of long-term debt	403	502
Other	247	178
Total current liabilities	1,668	1,785
Long-term debt	4,435	3,704
Deferred credits and other liabilities
Deferred income taxes	2,091	1,903
Investment tax credits	94	98
Accrued pension and other post-retirement benefit costs	726	687
Asset retirement obligations	1,623	896
Regulatory liabilities	1,667	1,543
Other	284	303
Total deferred credits and other liabilities	6,485	5,430
Commitments and contingencies	0	0
Preferred stock	59	59
Equity
Common stock	2,159	2,148
Retained earnings	2,879	3,011
Accumulated other comprehensive loss	0	(71)
Total equity	5,038	5,088
Total liabilities and equity	17,685	16,066
PEF [Member]
Current assets
Cash and cash equivalents	20	16
Receivables	434	367
Receivables from affiliated companies	19	7
Inventory	618	659
Regulatory assets	214	244
Deferred tax assets	133	138
Prepayments and other current assets	44	37
Total current assets	1,482	1,468
Investments and other assets
Nuclear decommissioning trust funds	621	559
Other	187	142
Total investments and other assets	808	701
Property, plant and equipment
Cost	15,476	14,926
Accumulated depreciation and amortization	(4,594)	(4,474)
Net property, plant and equipment	10,882	10,452
Regulatory assets and deferred debits
Regulatory assets	1,446	1,629
Other	42	44
Total regulatory assets and deferred debits	1,488	1,673
Total assets	14,660	14,294
Current liabilities
Accounts payable	399	340
Payables to affiliated companies	25	14
Notes payable and commercial paper	0	233
Notes payable to affiliated companies	221	8
Taxes accrued	142	31
Interest accrued	59	54
Customer deposits	222	224
Derivative liabilities	130	220
Current maturities of long-term debt	435	10
Other	128	132
Total current liabilities	1,761	1,266
Long-term debt	4,237	4,671
Deferred credits and other liabilities
Deferred income taxes	1,541	1,325
Accrued pension and other post-retirement benefit costs	631	598
Asset retirement obligations	514	369
Regulatory liabilities	880	1,024
Other	217	332
Total deferred credits and other liabilities	3,783	3,648
Commitments and contingencies	0	0
Preferred stock	34	34
Equity
Common stock	1,762	1,757
Retained earnings	3,084	2,945
Accumulated other comprehensive loss	(1)	(27)
Total equity	4,845	4,675
Total liabilities and equity	$ 14,660	$ 14,294