Unaudited Condensed Conosolidated Statements of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities
Net income	$ 656	$ 735
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, amortization and accretion	632	804
Deferred income taxes and investment tax credits, net	430	263
Deferred fuel cost (credit)	(11)	(37)
Allowance for equity funds used during construction	(77)	(68)
Other adjustments to net income	202	197
Cash provided (used) by changes in operating assets and liabilities
Receivables	(93)	(252)
Inventory	(152)	111
Derivative collateral posted	52	(83)
Other assets	(19)	(25)
Income taxes, net	20	213
Accounts payable	(40)	45
Accrued pension and other benefits	(359)	(162)
Other liabilities	63	163
Net cash provided (used) by operating activities	1,304	1,904
Investing activities
Gross property additions	(1,535)	(1,643)
Nuclear fuel additions	(134)	(164)
Proceeds from sales of assets to affiliated companies		0
Purchases of available-for-sale securities and other investments	(4,536)	(5,927)
Proceeds from available-for-sale securities and other investments	4,509	5,915
Insurance proceeds	78	18
Changes in advances to affiliated companies	0	0
Return of investment in consolidated subsidiaries	0	0
Contributions to consolidated subsidiaries	0	0
Other investing activities	43	(3)
Net cash provided (used) by investing activities	(1,575)	(1,804)
Financing activities
Issuance of common stock, net	42	419
Dividends paid on common stock	(550)	(535)
Dividends paid to parent	0	0
Dividends paid to parent in excess of retained earnings	0	0
Net increase (decrease) in short-term debt	45	(140)
Proceeds from issuance of long-term debt, net	1,286	591
Retirement of long-term debt	(1,000)	(400)
Changes in advances from affiliated companies	0	0
Contributions from parent	0	0
Other financing activities	(60)	(69)
Net cash provided (used) by financing activities	(237)	(134)
Net increase (decrease) in cash and cash equivalents	(508)	(34)
Cash and cash equivalents at beginning of period	611	725
Cash and cash equivalents at end of period	103	691
Significant noncash transactions
Accrued property additions	253	255
PEC
Operating activities
Net income	437	483
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, amortization and accretion	491	450
Deferred income taxes and investment tax credits, net	222	123
Deferred fuel cost (credit)	19	63
Allowance for equity funds used during construction	(53)	(45)
Other adjustments to net income	20	68
Cash provided (used) by changes in operating assets and liabilities
Receivables	56	(89)
Receivables from affiliated companies	17	15
Inventory	(144)	120
Other assets	(5)	(41)
Income taxes, net	79	59
Accounts payable	(41)	(18)
Payables to affiliated companies	(21)	(1)
Accrued pension and other benefits	(228)	(103)
Other liabilities	39	65
Net cash provided (used) by operating activities	888	1,149
Investing activities
Gross property additions	(901)	(867)
Nuclear fuel additions	(121)	(132)
Purchases of available-for-sale securities and other investments	(430)	(352)
Proceeds from available-for-sale securities and other investments	401	323
Changes in advances to affiliated companies	(59)	199
Other investing activities	16	0
Net cash provided (used) by investing activities	(1,094)	(829)
Financing activities
Dividends paid on preferred stock	(2)	(2)
Dividends paid to parent	(450)	(75)
Proceeds from issuance of long-term debt, net	496	0
Contributions from parent	0	14
Other financing activities	(1)	0
Net cash provided (used) by financing activities	43	(63)
Net increase (decrease) in cash and cash equivalents	(163)	257
Cash and cash equivalents at beginning of period	230	35
Cash and cash equivalents at end of period	67	292
Significant noncash transactions
Accrued property additions	179	160
PEF
Operating activities
Net income	418	401
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, amortization and accretion	113	328
Deferred income taxes and investment tax credits, net	291	211
Deferred fuel cost (credit)	(30)	(100)
Allowance for equity funds used during construction	(24)	(23)
Other adjustments to net income	70	89
Cash provided (used) by changes in operating assets and liabilities
Receivables	(134)	(155)
Receivables from affiliated companies	(10)	(5)
Inventory	(10)	(11)
Derivative collateral posted	43	(59)
Other assets	(1)	(20)
Income taxes, net	51	117
Accounts payable	(2)	70
Payables to affiliated companies	7	(18)
Accrued pension and other benefits	(123)	(51)
Other liabilities	61	121
Net cash provided (used) by operating activities	720	895
Investing activities
Gross property additions	(624)	(774)
Nuclear fuel additions	(13)	(32)
Purchases of available-for-sale securities and other investments	(4,097)	(5,456)
Proceeds from available-for-sale securities and other investments	4,098	5,460
Insurance proceeds	74	18
Other investing activities	39	(2)
Net cash provided (used) by investing activities	(523)	(786)
Financing activities
Dividends paid on preferred stock	(1)	(1)
Dividends paid to parent	(475)	(50)
Proceeds from issuance of long-term debt, net	296	591
Retirement of long-term debt	(300)	(300)
Changes in advances from affiliated companies	60	(213)
Other financing activities	(8)	(8)
Net cash provided (used) by financing activities	(428)	19
Net increase (decrease) in cash and cash equivalents	(231)	128
Cash and cash equivalents at beginning of period	249	17
Cash and cash equivalents at end of period	18	145
Significant noncash transactions
Accrued property additions	72	92
Nuclear repairs insurance recovery	$ 48	$ 75