Unaudited Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Utility Plant
Utility plant in service	$ 31,284	$ 31,065
Accumulated depreciation	(12,141)	(12,001)
Utility plant in service, net	19,143	19,064
Other utility plant, net	217	217
Construction work in progress	2,698	2,449
Nuclear fuel, net of amortization	747	767
Total utility plant, net	22,805	22,497
Current assets
Cash and cash equivalents	565	230
Receivables, net	758	889
Notes receivable from affiliated companies	0	0
Inventory, net	1,447	1,438
Regulatory assets	250	275
Derivative collateral posted	166	147
Deferred tax assets	518	371
Prepayments and other current assets	131	133
Total current assets	3,835	3,483
Deferred debits and other assets
Regulatory assets	3,123	3,025
Nuclear decommissioning trust funds	1,762	1,647
Miscellaneous other property and investments	413	407
Goodwill	3,655	3,655
Other assets and deferred debits	382	345
Total deferred debits and other assets	9,335	9,079
Total assets	35,975	35,059
Common stock equity
Common stock	7,451	7,434
Accumulated other comprehensive loss	(160)	(165)
Retained earnings	2,718	2,752
Total common stock equity	10,009	10,021
Noncontrolling interests	2	4
Total equity	10,011	10,025
Preferred stock of subsidiaries	93	93
Long-term debt, affiliate	273	273
Long-term debt, net	11,742	11,718
Total capitalization	22,119	22,109
Current liabilities
Current portion of long-term debt	1,375	950
Short-term debt	1,056	671
Notes payable to affiliated companies	0	0
Accounts payable	878	909
Interest accrued	193	200
Dividends declared	2	78
Customer deposits	343	340
Derivative liabilities	484	436
Accrued compensation and other benefits	127	195
Other current liabilities	304	306
Total current liabilities	4,762	4,085
Deferred credits and other liabilities
Noncurrent income tax liabilities	2,637	2,355
Accumulated deferred investment tax credits	101	103
Regulatory liabilities	2,684	2,700
Asset retirement obligations	1,282	1,265
Accrued pension and other benefits	1,611	1,625
Derivative liabilities	364	352
Other liabilities and deferred credits	415	465
Total deferred credits and other liabilities	9,094	8,865
Commitments and contingencies (Notes 13 and 14)	0	0
Total capitalization and liabilities	35,975	35,059
PEC
Utility Plant
Utility plant in service	17,613	17,439
Accumulated depreciation	(7,628)	(7,567)
Utility plant in service, net	9,985	9,872
Other utility plant, net	181	181
Construction work in progress	1,439	1,294
Nuclear fuel, net of amortization	519	540
Total utility plant, net	12,124	11,887
Current assets
Cash and cash equivalents	21	20
Receivables, net	400	492
Receivables from affiliated companies	21	13
Inventory, net	779	775
Deferred fuel cost	25	31
Deferred tax assets	166	142
Prepayments and other current assets	99	76
Total current assets	1,511	1,549
Deferred debits and other assets
Regulatory assets	1,352	1,310
Nuclear decommissioning trust funds	1,163	1,088
Miscellaneous other property and investments	187	188
Other assets and deferred debits	87	80
Total deferred debits and other assets	2,789	2,666
Total assets	16,424	16,102
Common stock equity
Common stock	2,155	2,148
Accumulated other comprehensive loss	(66)	(71)
Retained earnings	2,884	3,011
Total common stock equity	4,973	5,088
Preferred stock	59	59
Long-term debt, net	3,693	3,693
Total capitalization	8,725	8,840
Current liabilities
Current portion of long-term debt	500	500
Short-term debt	441	188
Notes payable to affiliated companies	42	31
Accounts payable	520	527
Payables to affiliated companies	64	41
Interest accrued	64	77
Customer deposits	120	116
Derivative liabilities	149	130
Accrued compensation and other benefits	76	110
Other current liabilities	118	85
Total current liabilities	2,094	1,805
Deferred credits and other liabilities
Noncurrent income tax liabilities	2,062	1,976
Accumulated deferred investment tax credits	97	98
Regulatory liabilities	1,632	1,543
Asset retirement obligations	908	896
Accrued pension and other benefits	677	687
Other liabilities and deferred credits	229	257
Total deferred credits and other liabilities	5,605	5,457
Commitments and contingencies (Notes 13 and 14)	0	0
Total capitalization and liabilities	16,424	16,102
PEF
Utility Plant
Utility plant in service	13,506	13,461
Accumulated depreciation	(4,433)	(4,356)
Utility plant in service, net	9,073	9,105
Held for future use	36	36
Construction work in progress	1,259	1,155
Nuclear fuel, net of amortization	228	227
Total utility plant, net	10,596	10,523
Current assets
Cash and cash equivalents	18	16
Receivables, net	345	372
Receivables from affiliated companies	32	19
Notes receivable from affiliated companies	6	0
Inventory, net	669	663
Regulatory assets	225	244
Derivative collateral posted	136	123
Deferred tax assets	223	138
Prepayments and other current assets	25	39
Total current assets	1,679	1,614
Deferred debits and other assets
Regulatory assets	1,659	1,602
Nuclear decommissioning trust funds	599	559
Other assets and deferred debits	199	186
Total deferred debits and other assets	2,457	2,347
Total assets	14,732	14,484
Common stock equity
Common stock	1,760	1,757
Accumulated other comprehensive loss	(26)	(27)
Retained earnings	2,966	2,945
Total common stock equity	4,700	4,675
Preferred stock	34	34
Long-term debt, net	4,057	4,482
Total capitalization	8,791	9,191
Current liabilities
Current portion of long-term debt	425	0
Short-term debt	360	233
Notes payable to affiliated companies	0	8
Accounts payable	336	358
Payables to affiliated companies	38	25
Interest accrued	66	54
Customer deposits	223	224
Derivative liabilities	335	268
Accrued compensation and other benefits	30	53
Other current liabilities	129	112
Total current liabilities	1,942	1,335
Deferred credits and other liabilities
Noncurrent income tax liabilities	1,553	1,405
Regulatory liabilities	967	1,071
Asset retirement obligations	374	369
Accrued pension and other benefits	591	598
Capital lease obligations	188	189
Derivative liabilities	234	231
Other liabilities and deferred credits	92	95
Total deferred credits and other liabilities	3,999	3,958
Commitments and contingencies (Notes 13 and 14)	0	0
Total capitalization and liabilities	$ 14,732	$ 14,484