Commonwealth Edison 10-Q 23 Oct 09 2009 Q3 Quarterly report Financial data

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (USD $)
In Millions, except Per Share data	3 Months Ended Sep. 30, 2009	3 Months Ended Sep. 30, 2008	9 Months Ended Sep. 30, 2009	9 Months Ended Sep. 30, 2008
EXELON CORP
Operating revenues
Operating revenues	$4,339	$5,228	$13,202	$14,366
Operating expenses
Purchased power	796	1,327	2,400	3,565
Fuel	404	718	1,640	1,608
Operating and maintenance	1,020	1,110	3,492	3,383
Operating and maintenance for regulatory required programs	19	11	44	17
Depreciation and amortization	485	431	1,360	1,230
Taxes other than income	212	218	592	597
Total operating expenses	2,936	3,815	9,528	10,400
Operating income	1,403	1,413	3,674	3,966
Other income and deductions
Interest expense	(170)	(172)	(493)	(532)
Interest expense to affiliates, net	(18)	(31)	(62)	(106)
Equity in losses of investments	(8)	(6)	(21)	(19)
Other, net	148	(158)	367	(256)
Total other income and deductions	(48)	(367)	(209)	(913)
Income before income taxes	1,355	1,046	3,465	3,053
Income taxes	598	346	1,339	1,022
Income from continuing operations	757	700	2,126	2,031
Discontinued operations
Loss on disposal of discontinued operations (net of taxes of $0, $0, $0 and $0 for the three and nine months ended September 30, 2009 and 2008, respectively)	0	0	0	(1)
Loss from discontinued operations, net	0	0	0	(1)
Net income	757	700	2,126	2,030
Comprehensive income, net of income taxes
Net income	757	700	2,126	2,030
Pension and non-pension postretirement benefit plans:
Prior service benefit reclassified to periodic benefit cost	(3)	(2)	(8)	(7)
Actuarial loss reclassified to periodic cost	26	16	72	47
Transition obligation reclassified to periodic cost	1	1	2	2
Pension and non-pension postretirement benefit plans valuation adjustment	0	0	28	2
Change in unrealized gain (loss) on cash-flow hedges	(128)	1,280	177	328
Change in unrealized gain (loss) on marketable securities	2	(1)	7	(3)
Other comprehensive income (loss)	(102)	1,294	278	369
Comprehensive income	655	1,994	2,404	2,399
Average shares of common stock outstanding:
Basic	660	658	659	658
Diluted	662	662	661	663
Earnings per average common share - basic:
Income from continuing operations	1.15	1.06	3.22	3.09
Net income	1.15	1.06	3.22	3.09
Earnings per average common share - diluted:
Income from continuing operations	1.14	1.06	3.21	3.06
Net income	1.14	1.06	3.21	3.06
Dividends per common share	0.53	0.5	1.58	1.5
EXELON CORP | Retained Earnings
Discontinued operations
Net income			2,126
Comprehensive income, net of income taxes
Net income			2,126
EXELON CORP | Accumulated Other Comprehensive (Loss) Income
Pension and non-pension postretirement benefit plans:
Other comprehensive income (loss)			278
EXELON GENERATION CO LLC
Operating revenues
Operating revenues	1,534	2,059	4,737	5,584
Operating revenues from affiliates	911	1,014	2,687	2,727
Total operating revenues	2,445	3,073	7,424	8,311
Operating expenses
Purchased power	303	528	962	1,704
Fuel	379	669	1,295	1,211
Operating and maintenance	522	557	1,975	1,811
Operating and maintenance from affiliate	70	68	235	212
Depreciation and amortization	74	58	223	202
Taxes other than income	51	53	150	153
Total operating expenses	1,399	1,933	4,840	5,293
Operating income	1,046	1,140	2,584	3,018
Other income and deductions
Interest expense	(24)	(34)	(77)	(108)
Equity in losses of investments	(1)	0	(2)	(1)
Other, net	192	(164)	325	(292)
Total other income and deductions	167	(198)	246	(401)
Income before income taxes	1,213	942	2,830	2,617
Income taxes	556	307	1,133	891
Income from continuing operations	657	635	1,697	1,726
Discontinued operations
Loss on disposal of discontinued operations (net of taxes of $0, $0, $0 and $0 for the three and nine months ended September 30, 2009 and 2008, respectively)	0	0	0	(1)
Loss from discontinued operations, net	0	0	0	(1)
Net income	657	635	1,697	1,725
Comprehensive income, net of income taxes
Net income	657	635	1,697	1,725
Pension and non-pension postretirement benefit plans:
Prior service benefit reclassified to periodic benefit cost	0	(1)	0	(1)
Pension and non-pension postretirement benefit plans valuation adjustment	0	0	0	(3)
Change in unrealized gain (loss) on cash-flow hedges	(98)	1,656	559	543
Other comprehensive income (loss)	(98)	1,655	559	539
Comprehensive income	559	2,290	2,256	2,264
EXELON GENERATION CO LLC | Retained Earnings
Discontinued operations
Net income			1,697
Comprehensive income, net of income taxes
Net income			1,697
EXELON GENERATION CO LLC | Accumulated Other Comprehensive (Loss) Income
Pension and non-pension postretirement benefit plans:
Other comprehensive income (loss)			559
COMMONWEALTH EDISON CO
Operating revenues
Operating revenues	1,474	1,728	4,415	4,591
Operating revenues from affiliates	1	1	2	3
Total operating revenues	1,475	1,729	4,417	4,594
Operating expenses
Purchased power	423	655	1,235	1,605
Purchased power from affiliate	353	413	1,138	1,124
Operating and maintenance	234	265	668	701
Operating and maintenance from affiliate	39	41	128	127
Operating and maintenance for regulatory required programs	19	11	44	17
Depreciation and amortization	125	119	371	343
Taxes other than income	79	87	215	227
Total operating expenses	1,272	1,591	3,799	4,144
Operating income	203	138	618	450
Other income and deductions
Interest expense	(79)	(83)	(231)	(261)
Interest expense to affiliates, net	(3)	(4)	(10)	(18)
Equity in losses of investments	0	(2)	0	(7)
Other, net	(19)	3	67	12
Total other income and deductions	(101)	(86)	(174)	(274)
Income before income taxes	102	52	444	176
Income taxes	56	19	169	66
Discontinued operations
Net income	46	33	275	110
Comprehensive income, net of income taxes
Net income	46	33	275	110
Pension and non-pension postretirement benefit plans:
Change in unrealized gain (loss) on marketable securities	2	(1)	7	(3)
Other comprehensive income (loss)	2	(1)	7	(3)
Comprehensive income	48	32	282	107
COMMONWEALTH EDISON CO | Accumulated Other Comprehensive (Loss) Income
Pension and non-pension postretirement benefit plans:
Other comprehensive income (loss)			7
COMMONWEALTH EDISON CO | Retained (Deficit) Earnings Unappropriated
Discontinued operations
Net income			275
Comprehensive income, net of income taxes
Net income			275
PECO ENERGY CO
Operating revenues
Operating revenues	1,325	1,438	4,038	4,185
Operating revenues from affiliates	2	3	7	10
Total operating revenues	1,327	1,441	4,045	4,195
Operating expenses
Purchased power	70	93	203	257
Purchased power from affiliate	555	600	1,539	1,602
Fuel	26	50	346	397
Operating and maintenance	132	169	409	487
Operating and maintenance from affiliate	22	23	72	70
Depreciation and amortization	272	243	726	653
Taxes other than income	78	73	213	203
Total operating expenses	1,155	1,251	3,508	3,669
Operating income	172	190	537	526
Other income and deductions
Interest expense	(32)	(27)	(93)	(81)
Interest expense to affiliates, net	(14)	(28)	(52)	(90)
Equity in losses of investments	(6)	(4)	(19)	(11)
Other, net	2	2	8	13
Total other income and deductions	(50)	(57)	(156)	(169)
Income before income taxes	122	133	381	357
Income taxes	30	43	106	111
Discontinued operations
Net income	92	90	275	246
Preferred security dividends	1	1	3	3
Net income on common stock	91	89	272	243
Comprehensive income, net of income taxes
Net income	92	90	275	246
Pension and non-pension postretirement benefit plans:
Amortization of realized loss on settled cash flow swaps	(1)	0	(1)	(1)
Other comprehensive income (loss)	(1)	0	(1)	(1)
Comprehensive income	91	90	274	245
PECO ENERGY CO | Retained Earnings
Discontinued operations
Net income			275
Comprehensive income, net of income taxes
Net income			275
PECO ENERGY CO | Accumulated Other Comprehensive (Loss) Income
Pension and non-pension postretirement benefit plans:
Other comprehensive income (loss)			($1)

1_Consolidated Statements of Op

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $)
In Millions	3 Months Ended Sep. 30, 2009	3 Months Ended Sep. 30, 2008	9 Months Ended Sep. 30, 2009	9 Months Ended Sep. 30, 2008
EXELON CORP
Loss on disposal of discontinued operations, taxes	$0	$0	$0	$0
EXELON GENERATION CO LLC
Loss on disposal of discontinued operations, taxes	$0	$0	$0	$0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (USD $)
In Millions	9 Months Ended Sep. 30, 2009	9 Months Ended Sep. 30, 2008
EXELON CORP
Cash flows from operating activities
Net income	$2,126	$2,030
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	1,935	1,725
Impairment of long-lived assets	223	0
Deferred income taxes and amortization of investment tax credits	740	111
Net fair value changes related to derivatives and nuclear decommissioning trust funds	(257)	(115)
Other non-cash operating activities	464	658
Changes in assets and liabilities:
Accounts receivable	335	226
Inventories	41	(158)
Accounts payable, accrued expenses and other current liabilities	(463)	(261)
Counterparty collateral received, net	380	245
Income taxes	(176)	457
Pension and non-pension postretirement benefit contributions	(456)	(103)
Other assets and liabilities	(263)	(448)
Net cash flows provided by operating activities	4,629	4,367
Cash flows from investing activities
Capital expenditures	(2,252)	(2,282)
Proceeds from nuclear decommissioning trust fund sales	18,769	14,392
Investment in nuclear decommissioning trust funds	(18,949)	(14,621)
Change in restricted cash	32	28
Other investing activities	16	6
Net cash flows used in investing activities	(2,384)	(2,477)
Cash flows from financing activities
Changes in short-term debt	(71)	(431)
Issuance of long-term debt	1,987	1,969
Retirement of long-term debt	(1,515)	(1,397)
Retirement of long-term debt to financing affiliates	(533)	(862)
Dividends paid on common stock	(1,038)	(989)
Proceeds from employee stock plans	28	122
Purchase of treasury stock	0	(436)
Purchase of forward contract in relation to certain treasury stock	0	(64)
Other financing activities	0	69
Net cash flows used in financing activities	(1,142)	(2,019)
Increase (decrease) in cash and cash equivalents	1,103	(129)
Cash and cash equivalents at beginning of period	1,271	311
Cash and cash equivalents at end of period	2,374	182
EXELON CORP | Retained Earnings
Cash flows from operating activities
Net income	2,126
EXELON GENERATION CO LLC
Cash flows from operating activities
Net income	1,697	1,725
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	797	697
Impairment of long-lived assets	223	0
Deferred income taxes and amortization of investment tax credits	674	238
Net fair value changes related to derivatives and nuclear decommissioning trust funds	(257)	(113)
Other non-cash operating activities	29	234
Changes in assets and liabilities:
Accounts receivable	147	39
Inventories	(8)	(75)
Accounts payable, accrued expenses and other current liabilities	(105)	(93)
Counterparty collateral received, net	379	247
Income taxes	(22)	361
Pension and non-pension postretirement benefit contributions	(208)	(48)
Other assets and liabilities	(161)	(363)
Receivables from and payables to affiliates, net	(30)	(64)
Net cash flows provided by operating activities	3,155	2,785
Cash flows from investing activities
Capital expenditures	(1,330)	(1,204)
Proceeds from nuclear decommissioning trust fund sales	18,769	14,392
Investment in nuclear decommissioning trust funds	(18,949)	(14,621)
Changes in Exelon intercompany money pool	0	(288)
Change in restricted cash	14	19
Other investing activities	(1)	(3)
Net cash flows used in investing activities	(1,497)	(1,705)
Cash flows from financing activities
Issuance of long-term debt	1,546	0
Distribution to member	(1,800)	(1,244)
Contribution from member	58	86
Retirement of long-term debt	(920)	(12)
Other financing activities	(2)	2
Net cash flows used in financing activities	(1,118)	(1,168)
Increase (decrease) in cash and cash equivalents	540	(88)
Cash and cash equivalents at beginning of period	1,135	127
Cash and cash equivalents at end of period	1,675	39
EXELON GENERATION CO LLC | Retained Earnings
Cash flows from operating activities
Net income	1,697
COMMONWEALTH EDISON CO
Cash flows from operating activities
Net income	275	110
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	372	343
Deferred income taxes and amortization of investment tax credits	205	41
Other non-cash operating activities	235	197
Changes in assets and liabilities:
Accounts receivable	102	(30)
Inventories	3	(3)
Accounts payable, accrued expenses and other current liabilities	(171)	(60)
Income taxes	(84)	83
Pension and non-pension postretirement benefit contributions	(161)	(7)
Other assets and liabilities	(22)	7
Receivables from and payables to affiliates, net	(43)	53
Net cash flows provided by operating activities	711	734
Cash flows from investing activities
Capital expenditures	(605)	(723)
Change in restricted cash	(1)	0
Other investing activities	15	13
Net cash flows used in investing activities	(591)	(710)
Cash flows from financing activities
Changes in short-term debt	80	(208)
Issuance of long-term debt	191	1,325
Retirement of long-term debt	(208)	(760)
Retirement of long-term debt to financing affiliates	0	(417)
Contributions from parent	8	13
Dividends paid on common stock	(180)	0
Net cash flows used in financing activities	(109)	(47)
Increase (decrease) in cash and cash equivalents	11	(23)
Cash and cash equivalents at beginning of period	47	87
Cash and cash equivalents at end of period	58	64
COMMONWEALTH EDISON CO | Retained (Deficit) Earnings Unappropriated
Cash flows from operating activities
Net income	275
PECO ENERGY CO
Cash flows from operating activities
Net income	275	246
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	726	653
Deferred income taxes and amortization of investment tax credits	(166)	(178)
Other non-cash operating activities	107	152
Changes in assets and liabilities:
Accounts receivable	86	(6)
Inventories	47	(80)
Accounts payable, accrued expenses and other current liabilities	(154)	(61)
Income taxes	27	76
Pension and non-pension postretirement benefit contributions	(41)	(25)
Other assets and liabilities	(77)	(16)
Receivables from and payables to affiliates, net	32	6
Net cash flows provided by operating activities	862	767
Cash flows from investing activities
Capital expenditures	(267)	(299)
Change in restricted cash	2	1
Other investing activities	2	7
Net cash flows used in investing activities	(263)	(291)
Cash flows from financing activities
Changes in short-term debt	(95)	(223)
Issuance of long-term debt	250	644
Retirement of long-term debt	0	(604)
Retirement of long-term debt to financing affiliates	(533)	(445)
Contributions from parent	27	36
Changes in Exelon intercompany money pool	0	288
Dividends paid on common stock	(247)	(382)
Dividends paid on preferred securities	(3)	(3)
Repayment of receivable from parent	240	213
Other financing activities	0	1
Net cash flows used in financing activities	(361)	(475)
Increase (decrease) in cash and cash equivalents	238	1
Cash and cash equivalents at beginning of period	39	34
Cash and cash equivalents at end of period	277	35
PECO ENERGY CO | Retained Earnings
Cash flows from operating activities
Net income	$275

Consolidated Balance Sheets

Consolidated Balance Sheets (USD $)
In Millions	9 Months Ended Sep. 30, 2009	9 Months Ended Dec. 31, 2008
EXELON CORP
Current assets
Cash and cash equivalents	$2,374	$1,271
Restricted cash and investments	43	75
Accounts receivable, net
Customer	1,418	1,928
Other	442	324
Mark-to-market derivative assets	467	410
Inventories, net
Fossil fuel	216	315
Materials and supplies	568	528
Other	367	517
Total current assets	5,895	5,368
Property, plant and equipment, net	26,653	25,813
Deferred debits and other assets
Regulatory assets	5,137	5,940
Nuclear decommissioning trust funds	6,502	5,500
Investments	707	670
Investments in affiliates	25	45
Goodwill	2,625	2,625
Mark-to-market derivative assets	482	507
Other	1,476	1,349
Total deferred debits and other assets	16,954	16,636
Total assets	49,502	47,817
Current liabilities
Short-term borrowings	140	211
Long-term debt due within one year	873	29
Long-term debt to PECO Energy Transition Trust due within one year	591	319
Accounts payable	1,075	1,416
Mark-to-market derivative liabilities	206	214
Accrued expenses	888	1,151
Deferred income taxes	117	77
Other	554	663
Total current liabilities	4,444	4,080
Long-term debt	11,021	11,397
Long-term debt to PECO Energy Transition Trust	0	805
Long-term debt to financing trust	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	5,858	4,939
Asset retirement obligations	3,381	3,734
Pension obligations	3,782	4,111
Non-pension postretirement benefit obligations	2,248	2,255
Spent nuclear fuel obligation	1,017	1,015
Regulatory liabilities	3,395	2,520
Mark-to-market derivative liabilities	72	24
Other	1,317	1,413
Total deferred credits and other liabilities	21,070	20,011
Total liabilities	36,925	36,683
Commitments and contingencies	-	-
Preferred securities	87	87
Shareholders' equity
Common stock	8,896	8,816
Treasury stock, at cost (35 and 35 shares held at September 30, 2009 and December 31, 2008, respectively)	(2,338)	(2,338)
Retained earnings	7,905	6,820
Accumulated other comprehensive income (loss), net	(1,973)	(2,251)
Total shareholders' equity	12,490	11,047
Total liabilities and shareholders' equity	49,502	47,817
EXELON CORP | Common Stock
Shareholders' equity
Total shareholders' equity	8,896	8,816
EXELON CORP | Treasury Stock
Shareholders' equity
Total shareholders' equity	(2,338)	(2,338)
EXELON CORP | Retained Earnings
Shareholders' equity
Total shareholders' equity	7,905	6,820
EXELON CORP | Accumulated Other Comprehensive (Loss) Income
Shareholders' equity
Total shareholders' equity	(1,973)	(2,251)
EXELON GENERATION CO LLC
Current assets
Cash and cash equivalents	1,675	1,135
Restricted cash	8	22
Accounts receivable, net
Customer	450	673
Other	180	108
Mark-to-market derivative assets	467	410
Mark-to-market derivative assets with affiliate	305	111
Receivables from affiliates	268	277
Inventories, net
Fossil fuel	90	143
Materials and supplies	478	435
Other	246	410
Total current assets	4,167	3,724
Property, plant and equipment, net	9,320	8,907
Deferred debits and other assets
Nuclear decommissioning trust funds	6,502	5,500
Investments	43	33
Mark-to-market derivative assets	470	490
Receivable from affiliate	1	1
Mark-to-market derivative assets with affiliate	780	345
Prepaid pension asset	1,046	949
Other	542	406
Total deferred debits and other assets	9,384	7,724
Total assets	22,871	20,355
Current liabilities
Long-term debt due within one year	147	12
Accounts payable	690	792
Mark-to-market derivative liabilities	206	214
Accrued expenses	559	761
Payables to affiliates	40	78
Deferred income taxes	405	256
Other	232	324
Total current liabilities	2,279	2,437
Long-term debt	2,992	2,502
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,878	1,968
Asset retirement obligations	3,262	3,536
Pension obligations	0	63
Non-pension postretirement benefit obligations	675	576
Spent nuclear fuel obligation	1,017	1,015
Payables to affiliates	2,153	1,336
Mark-to-market derivative liabilities	70	24
Other	445	332
Total deferred credits and other liabilities	10,500	8,850
Total liabilities	15,771	13,789
Commitments and contingencies	-	-
Member's equity
Membership interest	3,465	3,407
Undistributed earnings	2,220	2,323
Accumulated other comprehensive income, net	1,414	835
Total member's equity	7,099	6,565
Noncontrolling interest	1	1
Total equity	7,100	6,566
Total liabilities and equity	22,871	20,355
EXELON GENERATION CO LLC | Retained Earnings
Member's equity
Total equity	2,220	2,323
EXELON GENERATION CO LLC | Accumulated Other Comprehensive (Loss) Income
Member's equity
Total equity	1,414	835
EXELON GENERATION CO LLC | Membership Interest
Member's equity
Total equity	3,465	3,407
EXELON GENERATION CO LLC | Noncontrolling Interest
Member's equity
Total equity	1	1
COMMONWEALTH EDISON CO
Current assets
Cash and cash equivalents	58	47
Restricted cash	2	1
Accounts receivable, net
Customer	637	798
Other	147	162
Inventories, net
Inventories, net	72	75
Regulatory assets	332	169
Deferred income taxes	58	32
Other	23	25
Total current assets	1,329	1,309
Property, plant and equipment, net	11,947	11,655
Deferred debits and other assets
Regulatory assets	1,191	858
Investments	40	34
Goodwill	2,625	2,625
Receivable from affiliate	1,863	1,291
Prepaid pension asset	931	847
Other	595	618
Total deferred debits and other assets	7,245	6,273
Total assets	20,521	19,237
Current liabilities
Short-term borrowings	140	60
Long-term debt due within one year	213	17
Accounts payable	201	307
Accrued expenses	265	306
Payables to affiliates	135	179
Customer deposits	127	119
Mark-to-market derivative liability with affiliate	305	111
Other	48	54
Total current liabilities	1,434	1,153
Long-term debt	4,497	4,709
Long-term debt to financing trust	206	206
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,606	2,369
Asset retirement obligations	95	174
Non-pension postretirement benefit obligations	270	203
Regulatory liabilities	3,078	2,440
Mark-to-market derivative liability with affiliate	779	345
Other	711	903
Total deferred credits and other liabilities	7,539	6,434
Total liabilities	13,676	12,502
Commitments and contingencies	-	-
Shareholders' equity
Common stock	1,588	1,588
Other paid-in capital	4,990	4,982
Retained earnings	265	170
Accumulated other comprehensive income (loss), net	2	(5)
Total shareholders' equity	6,845	6,735
Total liabilities and shareholders' equity	20,521	19,237
COMMONWEALTH EDISON CO | Common Stock
Shareholders' equity
Total shareholders' equity	1,588	1,588
COMMONWEALTH EDISON CO | Accumulated Other Comprehensive (Loss) Income
Shareholders' equity
Total shareholders' equity	2	(5)
COMMONWEALTH EDISON CO | Other Paid-In Capital
Shareholders' equity
Total shareholders' equity	4,990	4,982
COMMONWEALTH EDISON CO | Retained (Deficit) Earnings Unappropriated
Shareholders' equity
Total shareholders' equity	(1,639)	(1,639)
COMMONWEALTH EDISON CO | Retained Earnings Appropriated
Shareholders' equity
Total shareholders' equity	1,904	1,809
PECO ENERGY CO
Current assets
Cash and cash equivalents	277	39
Restricted cash	0	2
Accounts receivable, net
Customer	331	457
Other	52	39
Inventories, net
Fossil fuel	125	172
Materials and supplies	18	18
Deferred income taxes	70	78
Prepaid utility taxes	43	0
Other	16	14
Total current assets	932	819
Property, plant and equipment, net	5,207	5,074
Deferred debits and other assets
Regulatory assets	2,016	2,597
Investments	18	15
Investments in affiliates	19	39
Receivable from affiliate	292	47
Other	623	578
Total deferred debits and other assets	2,968	3,276
Total assets	9,107	9,169
Current liabilities
Short-term borrowings	0	95
Long-term debt to PECO Energy Transition Trust due within one year	591	319
Accounts payable	100	204
Accrued expenses	137	120
Payables to affiliates	176	144
Customer deposits	67	74
Other	27	25
Total current liabilities	1,098	981
Long-term debt	2,221	1,971
Long-term debt to PECO Energy Transition Trust	0	805
Long-term debt to financing trust	184	184
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,287	2,451
Asset retirement obligations	24	24
Non-pension postretirement benefit obligations	294	283
Regulatory liabilities	295	49
Other	144	152
Total deferred credits and other liabilities	3,044	2,959
Total liabilities	6,547	6,900
Commitments and contingencies	-	-
Preferred securities	87	87
Shareholders' equity
Common stock	2,318	2,291
Receivable from parent	(260)	(500)
Retained earnings	414	389
Accumulated other comprehensive income (loss), net	1	2
Total shareholders' equity	2,473	2,182
Total liabilities and shareholders' equity	9,107	9,169
PECO ENERGY CO | Common Stock
Shareholders' equity
Total shareholders' equity	2,318	2,291
PECO ENERGY CO | Retained Earnings
Shareholders' equity
Total shareholders' equity	414	389
PECO ENERGY CO | Accumulated Other Comprehensive (Loss) Income
Shareholders' equity
Total shareholders' equity	1	2
PECO ENERGY CO | Receivable from Parent
Shareholders' equity
Total shareholders' equity	($260)	($500)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) (EXELON CORP, USD $)
Share data in Millions	Sep. 30, 2009	Dec. 31, 2008
Common stock, par value	$0	$0
Common stock, shares authorized	2,000	2,000
Common stock, shares outstanding	659	658
Treasury stock, shares held	35	35

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity (USD $)
In Millions, except Share data in Thousands	3 Months Ended Sep. 30, 2009	9 Months Ended Sep. 30, 2009	Dec. 31, 2008
EXELON CORP
Beginning Balance		$11,047
Net income	757	2,126
Long-term incentive plan activity		80
Common stock dividends		(1,041)
Other comprehensive income, net of income taxes	(102)	278
Ending Balance	12,490	12,490	11,047
EXELON CORP | Common Stock
Beginning Balance		692,953
Long-term incentive plan activity		1,191
Ending Balance	694,144	694,144	692,953
Beginning Balance		8,816
Long-term incentive plan activity		80
Ending Balance	8,896	8,896	8,816
EXELON CORP | Treasury Stock
Beginning Balance		(2,338)
Ending Balance			(2,338)
EXELON CORP | Retained Earnings
Beginning Balance		6,820
Net income		2,126
Common stock dividends		(1,041)
Ending Balance	7,905	7,905	6,820
EXELON CORP | Accumulated Other Comprehensive (Loss) Income
Beginning Balance		(2,251)
Other comprehensive income, net of income taxes		278
Ending Balance	(1,973)	(1,973)	(2,251)
EXELON GENERATION CO LLC
Beginning Balance		6,566
Net income	657	1,697
Distribution to member		(1,800)
Allocation of tax benefit from member		58
Transfer of AmerGen pension and non-pension postretirement benefit plans to Exelon, net of income taxes of $17		20
Other comprehensive income, net of income taxes	(98)	559
Ending Balance	7,100	7,100	6,566
EXELON GENERATION CO LLC | Retained Earnings
Beginning Balance		2,323
Net income		1,697
Distribution to member		(1,800)
Ending Balance	2,220	2,220	2,323
EXELON GENERATION CO LLC | Accumulated Other Comprehensive (Loss) Income
Beginning Balance		835
Transfer of AmerGen pension and non-pension postretirement benefit plans to Exelon, net of income taxes of $17		20
Other comprehensive income, net of income taxes		559
Ending Balance	1,414	1,414	835
EXELON GENERATION CO LLC | Membership Interest
Beginning Balance		3,407
Allocation of tax benefit from member		58
Ending Balance	3,465	3,465	3,407
EXELON GENERATION CO LLC | Noncontrolling Interest
Beginning Balance		1
Ending Balance			1
COMMONWEALTH EDISON CO
Beginning Balance		6,735
Net income	46	275
Appropriation of retained earnings for future dividends		0
Common stock dividends		(180)
Allocation of tax benefit from parent		8
Other comprehensive income, net of income taxes	2	7
Ending Balance	6,845	6,845	6,735
COMMONWEALTH EDISON CO | Common Stock
Beginning Balance		1,588
Ending Balance			1,588
COMMONWEALTH EDISON CO | Accumulated Other Comprehensive (Loss) Income
Beginning Balance		(5)
Other comprehensive income, net of income taxes		7
Ending Balance	2	2	(5)
COMMONWEALTH EDISON CO | Other Paid-In Capital
Beginning Balance		4,982
Allocation of tax benefit from parent		8
Ending Balance	4,990	4,990	4,982
COMMONWEALTH EDISON CO | Retained (Deficit) Earnings Unappropriated
Beginning Balance		(1,639)
Net income		275
Appropriation of retained earnings for future dividends		(275)
Ending Balance	(1,639)	(1,639)	(1,639)
COMMONWEALTH EDISON CO | Retained Earnings Appropriated
Beginning Balance		1,809
Appropriation of retained earnings for future dividends		275
Common stock dividends		(180)
Ending Balance	1,904	1,904	1,809
PECO ENERGY CO
Beginning Balance		2,182
Net income	92	275
Common stock dividends		(247)
Preferred security dividends		(3)
Repayment of receivable from parent		240
Allocation of tax benefit from parent		27
Other comprehensive income, net of income taxes	(1)	(1)
Ending Balance	2,473	2,473	2,182
PECO ENERGY CO | Common Stock
Beginning Balance		2,291
Allocation of tax benefit from parent		27
Ending Balance	2,318	2,318	2,291
PECO ENERGY CO | Retained Earnings
Beginning Balance		389
Net income		275
Common stock dividends		(247)
Preferred security dividends		(3)
Ending Balance	414	414	389
PECO ENERGY CO | Accumulated Other Comprehensive (Loss) Income
Beginning Balance		2
Other comprehensive income, net of income taxes		(1)
Ending Balance	1	1	2
PECO ENERGY CO | Receivable from Parent
Beginning Balance		(500)
Repayment of receivable from parent		240
Ending Balance	($260)	($260)	($500)

2_Consolidated Statement of Cha

Consolidated Statement of Changes in Equity (Parenthetical) (USD $)
In Millions	9 Months Ended Sep. 30, 2009
EXELON CORP
Other comprehensive income, income taxes	$199
EXELON GENERATION CO LLC
Transfer of AmerGen pension and non-pension postretirement benefit plans to Exelon, income taxes	17
Other comprehensive income, income taxes	368
COMMONWEALTH EDISON CO
Other comprehensive income, income taxes	(5)
PECO ENERGY CO
Other comprehensive income, income taxes	$0

1. Basis of Presentation

1. Basis of Presentation (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
1. Basis of Presentation (Exelon, Generation, ComEd and PECO)	1.Basis of Presentation (Exelon, Generation, ComEd and PECO) Exelon Corporation (Exelon) is a utility services holding company engaged, through its subsidiaries, in the generation and energy delivery businesses. The generation business consists of the electric generating facilities, the wholesale energy marketing operations and competitive retail supply operations of Exelon Generation Company, LLC (Generation). The energy delivery businesses include the purchase and regulated retail sale of electricity and the provision of distribution and transmission services by Commonwealth Edison Company (ComEd) in northern Illinois, including the City of Chicago, and by PECO Energy Company (PECO) in southeastern Pennsylvania, including the City of Philadelphia, and the purchase and regulated retail sale of natural gas and the provision of distribution services by PECO in the Pennsylvania counties surrounding the City of Philadelphia. Exelons corporate operations, some of which are performed through its business services subsidiary, Exelon Business Services Company, LLC (BSC), provide Exelons subsidiaries with a variety of support services at cost, including legal, human resources, financial, information technology and supply management services. The costs of BSC, including support services, are directly charged or allocated to the applicable subsidiaries using a cost-causative allocation method. Corporate governance type costs that cannot be directly assigned are allocated based on a Modified Massachusetts formula, which is a method that utilizes a combination of gross revenues, total assets, and direct labor costs for the allocation base. The results of Exelons corporate operations are presented as Other within the consolidated financial statements and include intercompany eliminations unless otherwise disclosed. Exelon owns 100% of all of its significant consolidated subsidiaries, either directly or indirectly, except for ComEd, of which Exelon owns more than 99%, and PECO, of which Exelon owns 100% of the common stock but none of PECOs preferred securities. Exelon has reflected the third-party interests in ComEd, which totaled less than $1 million at September30, 2009, as equity, and PECOs preferred securities as preferred securities of subsidiary in its consolidated financial statements. Generation owns 100% of all of its significant consolidated subsidiaries, either directly or indirectly, except for Exelon SHC, LLC, of which Generation owns 99% and the remaining 1% is indirectly owned by Exelon, which is eliminated in Exelons consolidated financial statements. AmerGen Energy Company, LLC (AmerGen), formerly a wholly owned subsidiary of Generation through January8, 2009, owned and operated the Clinton Nuclear Power Station (Clinton), Three Mile Island (TMI) Unit No.1 and the Oyster Creek Generating Station (Oyster Creek). Effective January8, 2009, AmerGen was dissolved and the operating licenses for Clinton, TMI and Oyster Creek were transferred to Generation, which continues to operate those plants. Each of Generations, ComEds and PECOs consolidated financial statements includes the accounts of their subsidiaries. All intercompany tran

2. New Accounting Pronouncem

2. New Accounting Pronouncements (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
2. New Accounting Pronouncements (Exelon, Generation, ComEd and PECO)	2.New Accounting Pronouncements (Exelon, Generation, ComEd and PECO) Noncontrolling Interests in Consolidated Financial Statements In December 2007, the FASB issued authoritative guidance clarifying that a noncontrolling interest in a subsidiary is an ownership interest in the consolidated entity that should be reported as equity in the consolidated financial statements. This guidance requires that a change in a parents ownership interest in a subsidiary be reported as an equity transaction in the consolidated financial statements when it does not result in a change in control of the subsidiary. When a change in a parents ownership interest results in deconsolidation, a gain or loss should be recognized in the consolidated financial statements. This guidance was applied prospectively as of January1, 2009, except for the presentation and disclosure requirements, which were applied retrospectively for all periods presented. The adoption had no impact on Exelons consolidated financial statements. Generation reclassified its noncontrolling interest of a consolidated subsidiary from mezzanine equity to equity in its Consolidated Balance Sheets and Statement of Changes in Equity for all periods presented. The noncontrolling interest is eliminated in Exelons Consolidated financial statements as it is owned by Exelon. PECO reclassified preferred securities from shareholders equity to mezzanine equity within its Consolidated Balance Sheets for all periods presented, and separately reflects its preferred security dividends on its Statement of Operations. On Exelons Statement of Operations and Comprehensive Income, the dividends on PECOs preferred securities are included in interest expense and have not been reflected separately as the amounts are not considered significant. Business Combinations In December 2007, the FASB revised the authoritative guidance for business combinations. Transaction costs are now required to be expensed as incurred and adjustments to the acquired entitys deferred tax assets and uncertain tax position balances occurring outside the measurement period are recorded as a component ofincome tax expense, rather than goodwill, among other changes. In April 2009, the FASB revised the authoritative guidance related to the initial recognition and measurement, subsequent measurement and accounting, and disclosure of assets and liabilities arising from contingencies in a business combination. Generally, assets acquired and liabilities assumed in a business combination that arise from contingencies must be recognized at fair value at the acquisition date. This guidance became effective for the Registrants as of January1, 2009. As this guidance is applied prospectively to business combinations with an acquisition date on or after the date the guidance became effective, the impact to the Registrants cannot be determined until the transactions occur. No such transactions have occurred during 2009. Derivative Instrument and Hedging Activity Disclosures In March 2008, the FASB amended and expanded the disclosure requirements related to derivative instruments and hedging activities by requiring enhanced disclosures ab

3. Regulatory Issues

3. Regulatory Issues (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
3. Regulatory Issues (Exelon, Generation, ComEd and PECO)	3.Regulatory Issues (Exelon, Generation, ComEd and PECO) Illinois Settlement Agreement (Exelon, Generation and ComEd).In July 2007, following extensive discussions with legislative leaders in Illinois, ComEd, Generation, and other utilities and generators in Illinois reached an agreement (Illinois Settlement) with various parties concluding discussions of measures to address concerns about higher electric bills in Illinois without rate freeze, generation tax or other legislation that Exelon believes would be harmful to consumers of electricity, electric utilities, generators of electricity and the State of Illinois. Legislation reflecting the Illinois Settlement (Illinois Settlement Legislation) was signed into law in August2007. The Illinois Settlement and the Illinois Settlement Legislation provide for the following, among other things: Rate Relief Programs Various Illinois electric utilities, their affiliates, and generators of electricity in Illinois agreed to contribute approximately $1 billion over a period of four years (2007-2010) to programs to provide rate relief to Illinois electricity customers and funding for the Illinois Power Agency (IPA) created by the Illinois Settlement Legislation. ComEd and Generation committed to contributing $811 million to rate relief programs over the four year period and partial funding for the IPA. ComEd committed to issue $64 million in rate relief credits to customers or to fund various programs to assist customers. Generation committed to contribute an aggregate of $747 million, consisting of $435 million to pay ComEd for rate relief programs for ComEd customers, $307.5 million for rate relief programs for customers of other Illinois utilities and $4.5 million for partially funding operations of the IPA. The contributions are recognized in the financial statements of Generation and ComEd as rate relief credits are applied to customer bills by ComEd and other Illinois utilities, or as operating expenses associated with the programs are incurred. During the three and nine months ended September30, 2009, Generation and ComEd recognized net costs from their contributions pursuant to the Illinois Settlement in their Consolidated Statements of Operations as follows: Three Months Ended September30, 2009 Generation ComEd TotalCreditsIssued toComEdCustomers Credits to ComEd customers(a) $ 1 $ 2 $ 3 Credits to other Illinois utilities customers(a) 13 n/a n/a Other rate relief programs(b) 1 n/a Total incurred costs $ 14 $ 3 $ 3 (a) Recorded as a reduction in operating revenues (b) Recorded as a charge to operating and maintenance expense Nine Months Ended September30, 2009 Generation ComEd TotalCreditsIssued toComEdCustomers Credits to ComEd customers(a) $ 39 $ 4 $ 43 Credits to other Illinois utilities customers(a) 39 n/a n/a Other rate relief programs(b) 2 n/a Total incurred costs $ 78 $ 6 $ 43 (a) Recorded as a re

4. Property Plant and Equipm

4. Property Plant and Equipment (Exelon and Generation)
	9 Months Ended Sep. 30, 2009 USD / shares
EXELON CORP
Notes to Financial Statements [Abstract]
4. Property Plant and Equipment (Exelon and Generation)	4.Property Plant and Equipment (Exelon and Generation) Long-Lived Asset Impairments (Exelon and Generation) Generation evaluated its Texas plants, comprised of the Handley, Mountain Creek and LaPorte generating stations, for potential impairment as of December31, 2008, and concluded that there was no impairment, as the plants estimated undiscounted future cash flows exceeded the carrying values of the plants. Due to the continued decline in forward energy prices in the first quarter of 2009, Generation again evaluated its Texas plants for recoverability as of March31, 2009. As the estimated undiscounted future cash flows and fair value of the Handley and Mountain Creek stations were less than the stations carrying values, the stations were determined to be impaired at March31, 2009. LaPorte station was determined not to be impaired. Accordingly,the Handley and Mountain Creek stations were written down to fair value, and an impairment charge of $223 million was recorded in operating and maintenance expense in Exelons and Generations Consolidated Statements of Operations in the first quarter of 2009. The fair value of the stations was determined using the income (discounted cash flow), market (available comparables) and cost (replacement cost) valuation approaches in determining fair value. During the second and third quarter of 2009, Generation assessed whether there had been any triggering events requiring an impairment assessment for any of its generating stations. Based on this analysis, it was determined that Generation did not have any triggering events requiring impairment assessments for any of its generating stations during the three months ended June30, 2009 and September30, 2009. See Note 6 Fair Value of Assets and Liabilities for additional disclosures.
EXELON GENERATION CO LLC
Notes to Financial Statements [Abstract]
4. Property Plant and Equipment (Exelon and Generation)	4.Property Plant and Equipment (Exelon and Generation) Long-Lived Asset Impairments (Exelon and Generation) Generation evaluated its Texas plants, comprised of the Handley, Mountain Creek and LaPorte generating stations, for potential impairment as of December31, 2008, and concluded that there was no impairment, as the plants estimated undiscounted future cash flows exceeded the carrying values of the plants. Due to the continued decline in forward energy prices in the first quarter of 2009, Generation again evaluated its Texas plants for recoverability as of March31, 2009. As the estimated undiscounted future cash flows and fair value of the Handley and Mountain Creek stations were less than the stations carrying values, the stations were determined to be impaired at March31, 2009. LaPorte station was determined not to be impaired. Accordingly,the Handley and Mountain Creek stations were written down to fair value, and an impairment charge of $223 million was recorded in operating and maintenance expense in Exelons and Generations Consolidated Statements of Operations in the first quarter of 2009. The fair value of the stations was determined using the income (discounted cash flow), market (available comparables) and cost (replacement cost) valuation approaches in determining fair value. During the second and third quarter of 2009, Generation assessed whether there had been any triggering events requiring an impairment assessment for any of its generating stations. Based on this analysis, it was determined that Generation did not have any triggering events requiring impairment assessments for any of its generating stations during the three months ended June30, 2009 and September30, 2009. See Note 6 Fair Value of Assets and Liabilities for additional disclosures.

5 . Intangible Assets

5 . Intangible Assets (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
5. Intangible Assets (Exelon, Generation, ComEd and PECO)	5.Intangible Assets (Exelon, Generation, ComEd and PECO) Goodwill (Exelon and ComEd).As of September30, 2009 and December31, 2008, Exelon and ComEd had goodwill of approximately $2.6billion. Goodwill is tested for impairment at least annually or more frequently if events or circumstances indicate that it is more likely than not that goodwill might be impaired, such as a significant negative regulatory outcome or significant change in business conditions. Exelon and ComEd perform their annual goodwill impairment assessment in the fourth quarter of each year. Because of the continued uncertainty in the financial markets and overall economic conditions, during the first, second, and third quarters of 2009, ComEd reviewed the significant assumptions included in its goodwill impairment analysis to determine if it was more likely than not that ComEds fair value was less than its carrying value. The analyses focused on managements current expectations of future cash flows, as well as current market conditions that impact various economic indicators that are utilized in assessing ComEds fair value. Based on these analyses, it was determined that ComEd did not have any triggering events requiring ComEd to perform a goodwill assessment during the nine months ended September30, 2009. City of Chicago Settlements (Exelon and ComEd).Exelons and ComEds other intangible assets, included in deferred debits and other assets on the Consolidated Balance Sheets include the following previous payments associated with the City of Chicago settlements as of September30, 2009 and December31, 2008: Gross Accumulated Amortization Net Estimated amortization expense September30, 2009 Remainder of 2009 2010 2011 2012 2013 Chicago settlement 1999 agreement(a) $ 100 $ (60 ) $ 40 $ 1 $ 3 $ 3 $ 3 $ 3 Chicago settlement 2003 agreement(b) 62 (24 ) 38 1 4 4 4 4 Total intangible assets $ 162 $ (84 ) $ 78 $ 2 $ 7 $ 7 $ 7 $ 7 December31, 2008 Gross Accumulated Amortization Net Estimated amortization expense 2009 2010 2011 2012 2013 Chicago settlement 1999 agreement(a) $ 100 $ (58 ) $ 42 $ 3 $ 3 $ 3 $ 3 $ 3 Chicago settlement 2003 agreement(b) 62 (21 ) 41 4 4 4 4 4 Total intangible assets $ 162 $ (79 ) $ 83 $ 7 $ 7 $ 7 $ 7 $ 7 (a) In March1999, ComEd entered into a settlement agreement with the City of Chicago associated with ComEds franchise agreement. Under the terms of the settlement, ComEd agreed to make payments of $25 million to the City of Chicago each year from 1999 to 2002. The intangible asset recognized as a result of these payments is being amortized ratably over the remaining term of the franchise agreement, which ends in 2020. (b) In February2003, ComEd

6. Fair Value of Financial A

6. Fair Value of Financial Assets and Liabilities (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
6. Fair Value of Financial Assets and Liabilities (Exelon, Generation, ComEd and PECO)	6.Fair Value of Financial Assets and Liabilities (Exelon, Generation, ComEd and PECO) Fair Value of Financial Liabilities Recorded at the Carrying Amount Exelon The carrying amounts and fair values of Exelons long-term debt and spent nuclear fuel obligation as of September30, 2009 and December31, 2008 were as follows: September30, 2009 December31, 2008 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (including amounts due within one year) $ 11,894 $ 12,562 $ 11,426 $ 10,803 Long-term debt to PETT (including amounts due within one year) 591 617 1,124 1,193 Long-term debt to other financing trusts 390 318 390 200 Spent nuclear fuel obligation 1,017 835 1,015 544 Preferred securities of subsidiary 87 64 87 63 Generation The carrying amounts and fair values of Generations long-term debt and spent nuclear fuel obligation as of September30, 2009 and December, 31, 2008 were as follows: September30, 2009 December31, 2008 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (including amounts due within one year) $ 3,139 $ 3,294 $ 2,514 $ 2,402 Spent nuclear fuel obligation 1,017 835 1,015 544 ComEd The carrying amounts and fair values of ComEds long-term debt as of September30, 2009 and December31, 2008 were as follows: September30, 2009 December31, 2008 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (including amounts due within one year) $ 4,710 $ 5,102 $ 4,726 $ 4,510 Long-term debt to financing trust 206 163 206 100 PECO The carrying amounts and fair values of PECOs long-term debt and preferred securities as of September30, 2009 and December31, 2008 were as follows: September30, 2009 December31, 2008 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (including amounts due within one year) $ 2,221 $ 2,348 $ 1,971 $ 1,954 Long-term debt to PETT (including amounts due within one year) 591 617 1,124 1,193 Long-term debt to other financing trusts 184 155 184 100 Preferred securities 87 64 87 63 Recurring Fair Value Measurements To increase consistency and comparability in fair value measurements, the FASB established a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows: Level 1 quoted prices (unadjusted) in active markets for identical assets or liabilities that the Registrants have the ability to access as of the reporting date. Financial assets and liabilities utilizing Level 1 inputs include active exchange-traded equity securities, exchange-based derivatives, mutual funds and money market funds. Level 2 inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirect

7. Debt and Credit Agreement

7. Debt and Credit Agreements (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
7. Debt and Credit Agreements (Exelon, Generation, ComEd and PECO)	7.Debt and Credit Agreements (Exelon, Generation, ComEd and PECO) Short-Term Borrowings Exelon meets its short-term liquidity requirements primarily through the issuance of commercial paper, Generation and PECO meet their short-term liquidity requirements primarily through the issuance of commercial paper and borrowings from the intercompany money pool and ComEd meets its short-term liquidity requirements primarily through borrowings under its credit facility. As of September30, 2009, Exelon Corporate, Generation, ComEd and PECO had access to unsecured revolving credit facilities with aggregate bank commitments of $957 million, $4.8 billion, $952 million and $574 million, respectively. See Note10 of Exelons 2008 Annual Report on Form10-K for further information regarding the credit facilities. Generation also had additional letter of credit facilities used solely to enhance tax-exempt variable rate debt as discussed further below. Exelon, Generation, ComEd and PECO had the following amounts of commercial paper and credit facility borrowings outstanding at September30, 2009 and December31, 2008: Commercial paper borrowings September30, 2009 December31, 2008 Exelon Corporate $ $ 56 Generation $ $ PECO $ $ 95 Credit facility borrowings ComEd $ 140 $ 60 Issuance of Long-Term Debt During the nine months ended September30, 2009, the following long-term debt was issued: Company Type InterestRate Maturity Amount(a) Generation PollutionControlNotes 5.00 % December1,2042 $ 46 Generation Senior Notes 5.20 % October 1, 2019 600 Generation Senior Notes 6.25 % October 1, 2039 900 ComEd FirstMortgageBonds(b) Variable March 1, 2020 50 ComEd FirstMortgageBonds(b) Variable March 1, 2017 91 ComEd FirstMortgageBonds(b) Variable May 1, 2021 50 PECO First Mortgage Bonds 5.00 % October 1, 2014 250 (a) Excludes unamortized bond discounts. (b) Variable-rate tax-exempt bonds secured by First Mortgage Bonds, which were remarketed in May 2009 following an earlier repurchase. Retirement of Long-Term Debt During the nine months ended September30, 2009, the following long-term debt was retired: Company Type InterestRate Maturity Amount Exelon SeniorNotes 6.75 % May1,2011 $ 387 Generation PollutionControlNotes Variable December1,2042 46 Generation Pollution Control Notes Variable April 1, 2021 51 Generation Pollution Control Notes Variable April 1, 2021 39 Generation Pollution Control Notes Variable December 1, 2029 30 Generation Pollution Control Notes Variable October 1, 2030 92 Generation Pollution Control Notes Variable October 1, 2030 69 Generation Pollution Control Notes Variable October 1, 2034 14 Generation Pollution Control Notes Variable October 1, 2034 13 Generation Notes Payable 6.33 % August 8

8. Derivative Financial Inst

8. Derivative Financial Instruments (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
8. Derivative Financial Instruments (Exelon, Generation, ComEd and PECO)	8.Derivative Financial Instruments (Exelon, Generation, ComEd and PECO) The Registrants are exposed to certain risks related to ongoing business operations. The primary risks managed by using derivative instruments are commodity price risk and interest rate risk. To the extent the amount of energy Exelon generates differs from the amount of energy it has contracted to sell, the Registrants are exposed to market fluctuations in the prices of electricity, coal, natural gas, and other commodities. The Registrants employ established policies and procedures to manage their risks associated with market fluctuations by entering into physical contracts as well as financial derivative contracts including swaps, futures, forwards, options and short-term and long-term commitments to purchase and sell energy and energy-related products. The Registrants believe these instruments, which are classified as either economic hedges or non-derivatives, mitigate exposure to fluctuations in commodity prices. Exposure to interest rate risk exists as a result of the issuance of variable and fixed-rate debt, commercial paper and lines of credit. Derivative accounting guidance requires that derivative instruments be recognized as either assets or liabilities at fair value. Under these provisions, economic hedges are recognized on the balance sheet at their fair value unless they qualify for the normal purchases and normal sales exception. The Registrants have applied the normal purchases and normal sales scope exception to certain derivative contracts for the forward sale of generation, power procurement agreements, and natural gas supply agreements. For economic hedges that qualify and are designated as cash-flow hedges, the portion of the derivative gain or loss that is effective in offsetting the change in value of the underlying exposure is deferred in accumulated other comprehensive income (OCI) and later reclassified into earnings when the underlying transaction occurs. For economic hedges that do not qualify or are not designated as cash-flow hedges, changes in the fair value of the derivative are recognized in earnings each period and are classified as other derivatives in the following tables. Non-derivative contracts for access to additional generation and for sales to load-serving entities are accounted for primarily under the accrual method of accounting, which is further discussed in Note18 of the Combined Notes to Consolidated Financial Statements within Exelons 2008 Annual Report on Form 10-K. Additionally, Generation is exposed to certain market risks through its proprietary trading activities. The proprietary activities are a complement to Generations energy marketing portfolio but represent a small portion of Generations overall energy marketing activities. Commodity Price Risk (Exelon, Generation, ComEd and PECO) Economic Hedging.The Registrants are exposed to commodity price risk primarily relating to changes in the market price of electricity, natural gas, coal, oil and emission allowances associated with price movements resulting from changes in supply and demand, fuel costs, market liquidity, weather conditions, governmental regulator

9. Retirement Benefits

9. Retirement Benefits (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
9. Retirement Benefits (Exelon, Generation, ComEd and PECO)	9.Retirement Benefits (Exelon, Generation, ComEd and PECO) Exelon sponsors defined benefit pension plans and postretirement benefit plans for essentially all Generation, ComEd, PECO and Exelon Corporate employees. Prior to January8, 2009, employees of Generations wholly owned subsidiary, AmerGen, participated in the separate AmerGen-sponsored defined benefit pension plan and postretirement benefit plan. Effective January8, 2009, the AmerGen legal entity was dissolved and Exelon became the sponsor of all AmerGen pension and postretirement benefit plans. The change in sponsorship did not have an impact on Exelons Consolidated Financial Statements. Defined Benefit Pension and Other Postretirement Benefits During the first quarter of 2009, Exelon received an updated valuation of its pension and other postretirement benefit obligations to reflect actual census data as of January1, 2009. This valuation resulted in an increase to the pension obligations of $57 million and a decrease to other postretirement obligations of $144 million. Additionally, AOCI decreased by approximately $28 million (after-tax). The impact to the Consolidated Statement of Operations and Comprehensive Income was not material. The following tables present the components of Exelons net periodic benefit costs for the three and nine months ended September30, 2009 and 2008. The 2009 pension benefit cost is calculated using an expected long-term rate of return on plan assets of 8.50%. The 2009 other postretirement benefit cost is calculated using an expected long-term rate of return on plan assets of 8.10%. A portion of the net periodic benefit cost is capitalized within the Consolidated Balance Sheets. Pension Benefits ThreeMonthsEnded September 30, OtherPostretirement Benefits ThreeMonthsEnded September 30, 2009 2008 2009 2008 Service cost $ 44 $ 40 $ 29 $ 27 Interest cost 163 158 52 52 Expected return on assets (194 ) (209 ) (24 ) (31 ) Amortization of: Transition obligation 2 3 Prior service cost (benefit) 4 5 (14 ) (14 ) Actuarial loss 49 32 20 13 Settlements 6 3 Net periodic benefit cost $ 72 $ 29 $ 65 $ 50 Contractual termination benefit $ $ $ 4 $ PensionBenefits NineMonthsEnded September 30, Other Postretirement Benefits NineMonthsEnded September 30, 2009 2008 2009 2008 Service cost $ 133 $ 122 $ 85 $ 81 Interest cost 488 476 154 156 Expected return on assets (582 ) (627 ) (71 ) (91 ) Amortization of: Transition obligation 7 7 Prior service cost (benefit) 11 11 (42 ) (42 ) Actuarial loss 147 96 64 39 Settlements 6 9 Net peri

10. Severance Accounting

10. Severance Accounting (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
10. Severance Accounting (Exelon, Generation, ComEd and PECO)	10.Severance Accounting (Exelon, Generation, ComEd and PECO) Exelon provides severance and health and welfare benefits to terminated employees pursuant to pre-existing severance plans primarily based upon each individual employees years of service and compensation level. Exelon accrues amounts associated with severance benefits that are considered probable and that can be reasonably estimated. On June18, 2009, Exelon announced a restructured senior executive team and major spending cuts, including the elimination of approximately 500 positions. Exelon eliminated approximately 400 corporate support positions, mostly located at corporate headquarters, and 100 management level positions at ComEd, the majority of which was completed by September30, 2009. These actions were in response to the continuing economic challenges confronting all parts of Exelons business and industry especially in light of the commodity-driven nature of Generations markets, necessitating continued focus on cost management through enhanced efficiency and productivity. Exelon recorded a pre-tax charge for estimated salary continuance and health and welfare severance benefits of $40 million in June 2009 as a result of the planned job reductions. In the three months ended September30, 2009, Exelon recorded a net pre-tax credit of approximately $5 million, which included a $9 million reduction in estimated salary continuance and health and welfare severance benefits, offset by $4 million of expense for contractual termination benefits. The following tables present total severance benefits costs, recorded as operating and maintenance expense in relation to the announced job reductions, for the three and nine months ended September30, 2009: Severance Benefits(a)(b) Generation ComEd PECO Other Exelon Expense (benefit) recorded three months $ (4 ) $ 1 $ (2 ) $ $ (5 ) Expense recorded nine months 11 19 3 2 35 (a) The amounts above include $(1) million and $7 million, $(1) million and $4 million, and $(1) million and $2 million at Generation, ComEd and PECO, respectively, for amounts billed through intercompany allocations for the three and nine months ended September30, 2009 respectively. (b) The severance benefits costs include $1 million of stock compensation expense collectively at Generation and ComEd for which the obligation is recorded in equity for the three and nine months ended September30, 2009, respectively. Severance benefits also include $4 million and $2 million at Exelon and ComEd, respectively, of contractual termination benefits expense for which the obligation is recorded in other postretirement benefits. The following table presents the activity of severance obligations for the announced job reductions from January1, 2009 through September30, 2009, excluding obligations recorded in equity: Severance Benefits Obligation Generation ComEd PECO Other Exelon Balance at January1, 2009 $ $ $ $ $ Severance charges recorded 7 12 2

11. Income Taxes

11. Income Taxes (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
11. Income Taxes (Exelon, Generation, ComEd and PECO)	11.Income Taxes (Exelon, Generation, ComEd and PECO) Exelons effective income tax rate from continuing operations for the three and nine months ended September30, 2009 was 44.1% and 38.6%, as compared to 33.1% and 33.5% for the three and nine months ended September30, 2008. The increase in the effective tax rate for the three and nine months ended September30, 2009 was primarily attributable to gains in 2009 compared to losses in 2008 generated in Generations nuclear decommissioning trust funds that are taxed at a higher statutory rate than Generations remaining income from operations and, to a lesser extent, a decrease in Generations Domestic Production Activities Deduction, which decreased primarily as a result of additional deductions for accelerated depreciation and a change in Generations tax method of accounting for repair costs. The increase for the nine months ended September30, 2009 was partially offset by a change in deferred state income taxes. The effective income tax rate for the three months ended September30, 2009 was further increased as a result of higher state income tax expenses driven by the charge to third quarter 2009 results of operations to reverse the state income tax benefit, previously recognized on the Illinois investment tax credits during the first quarter 2009. Generations effective income tax rate from continuing operations for the three and nine months ended September30, 2009 was 45.8% and 40.0%, as compared to 32.6% and 34.1% for the three and nine months ended September30, 2008. The increase in Generations effective tax rate for the three and nine months ended September30, 2009 was primarily attributable to gains in 2009 compared to losses in 2008 generated in the nuclear decommissioning trust funds that are taxed at a higher statutory rate than Generations remaining income from operations and, to a lesser extent, a decrease in Generations Domestic Production Activities Deduction, which decreased primarily as a result of additional deductions for accelerated depreciation and a change in Generations tax method of accounting for repair costs. The increase for the nine months ended September30, 2009 was partially offset by a change in deferred state income taxes. The effective income tax rate for the three months ended September30, 2009 was further increased as a result of higher state income tax expenses driven by the charge to third quarter 2009 results of operations to reverse the state income tax benefit, previously recognized on the Illinois investment tax credits during the first quarter 2009. ComEds effective income tax rate for the three and nine months ended September30, 2009 was 54.9% and 38.1%, as compared to 36.5% and 37.5% for the three and nine months ended September30, 2008. For the three months ended September30, 2009, the increase in the effective tax rate was primarily a result of an increase in state income tax expense driven by the charge to third quarter 2009 results of operations to reverse the state income tax benefit, previously recognized on the Illinois investment tax credits during the first quarter 2009. For the nine months ended September30, 2009, the increase in the effect

12. Asset Retirement Obligat

12. Asset Retirement Obligations and Spent Nuclear Fuel Storage (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
12. Asset Retirement Obligations and Spent Nuclear Fuel Storage (Exelon, Generation, ComEd and PECO)	12.Asset Retirement Obligations and Spent Nuclear Fuel Storage (Exelon, Generation, ComEd andPECO) Nuclear Decommissioning Asset Retirement Obligations (ARO) Generation has a legal obligation to decommission its nuclear power plants following the expiration of their operating licenses. Generation will pay for its respective obligations using trust funds that have been established for this purpose. To estimate its decommissioning obligation related to its nuclear generating stations, Generation uses a probability-weighted, discounted cash flow model which, on a unit-by-unit basis, considers multiple outcome scenarios based upon significant estimates and assumptions, including decommissioning cost studies, cost escalation studies, probabilistic cash flow models and discount rates. During the third quarter of 2009, Generation recorded a net decrease in the ARO of $416 million. The reduction of the ARO in 2009 is primarily due to declines in expected long-term escalation rates for energy and labor costs as compared to prior study periods, partially offset by increased costs resulting from updated decommissioning cost studies received for six nuclear units. This overall decrease in the ARO also resulted in the recognition of $47 million of income (pre-tax), which is included in operating and maintenance expense in Exelons and Generations Consolidated Statements of Operations, representing the reduction in the ARO in excess of the existing asset retirement cost balances for Generations nuclear generating units that are not subject to regulatory agreements with respect to decommissioning trust funding (the former AmerGen units and the unregulated portions of the Peach Bottom units). During the third quarter of 2008, Generation recorded a net decrease in the ARO of $256 million, primarily due to updated decommissioning cost studies received for seven nuclear units, a decline from the previous year in the cost escalation factor assumptions used to estimate future undiscounted decommissioning costs, and a change in managements expectation of the year in which the Department of Energy will establish a repository for and begin accepting spent nuclear fuel (from the previous estimate of 2018 to 2020), partially offset by a change in the probabilities assigned to decommissioning alternatives for Zion Station to reflect a revised probability for its accelerated decommissioning. This decrease in the ARO also resulted in the recognition of $19 million of income (pre-tax), which is included in operating and maintenance expense in Exelons and Generations Consolidated Statements of Operations, representing the reduction in the ARO in excess of the existing asset retirement cost balances for Generations nuclear generating units that are not subject to regulatory agreements with respect to decommissioning trust funding. In addition to the $256 million net decrease to the ARO recognized in the third quarter of 2008, additional net decreases to the ARO of $39 million were recorded during the first half of 2008 related to changes to the estimated cash flows of several units. These net decreases to the ARO had no impact on Exelons and Generations Consolidate

13. Earnings Per Share and E

13. Earnings Per Share and Equity (Exelon) (EXELON CORP)
	9 Months Ended Sep. 30, 2009 USD / shares
Notes to Financial Statements [Abstract]
13. Earnings Per Share and Equity (Exelon)	13.Earnings Per Share and Equity (Exelon) Earnings per Share Diluted earnings per share is calculated by dividing net income by the weighted average number of shares of common stock outstanding, including shares to be issued upon exercise of stock options, performance share awards and restricted stock outstanding under Exelons long-term incentive plans considered to be common stock equivalents. The following table sets forth the components of basic and diluted earnings per share and shows the effect of these stock options, performance share awards and restricted stock on the weighted average number of shares outstanding used in calculating diluted earnings per share: ThreeMonthsEnded September30, NineMonthsEnded September30, 2009 2008 2009 2008 Income from continuing operations $ 757 $ 700 $ 2,126 $ 2,031 Loss from discontinued operations (1 ) Net income $ 757 $ 700 $ 2,126 $ 2,030 Average common shares outstanding basic 660 658 659 658 Assumed exercise of stock options, performance share awards and restricted stock 2 4 2 5 Average common shares outstanding diluted 662 662 661 663 The number of stock options not included in the calculation of diluted common shares outstanding due to their antidilutive effect was approximately 6million and 5million for the three and nine months ended September30, 2009, respectively, and less than 1million for the three and nine months ended September30, 2008, respectively. Share Repurchases As part of its value return policy, Exelon uses share repurchases from time to time to return cash or balance sheet capacity to Exelon shareholders after funding maintenance capital and other commitments and in the absence of higher value-added growth opportunities. In 2008, Exelon management decided to defer indefinitely any share repurchases. This decision was made in light of a variety of factors, including: developments affecting the world economy and commodity markets, including those for electricity and gas; the continued uncertainty in capital and credit markets and other potential impacts of those events on Exelons future cash needs; projected cash needs to support investment in the business, including maintenance capital and nuclear uprates; and value-added growth opportunities. Under share repurchase programs, 34.8million shares of common stock are held as treasury stock with a cost of $2.3 billion as of September30, 2009. During the nine months ended September30, 2009, Exelon had no common stock repurchases. During the nine months ended September30, 2008, Exelon repurchased 6.6million shares of common stock for $500 million, including the impact of the settlement of forward contracts.

14. Commitments and Continge

14. Commitments and Contingencies (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
14. Commitments and Contingencies (Exelon, Generation, ComEd and PECO)	14.Commitments and Contingencies (Exelon, Generation, ComEd and PECO) For information regarding capital commitments at December31, 2008, see Note 18 of the Combined Notes to Consolidated Financial Statements within Exelons 2008 Annual Report on Form10-K. All significant contingencies are disclosed below. Energy Commitments Generations, ComEds and PECOs short and long-term commitments relating to the sale to and purchase of energy, capacity and transmission rights as of September30, 2009 changed from December 31, 2008 as follows: Generations total commitments for future sales of energy to unaffiliated third-party utilities and others increased by approximately $205million during the nine months ended September30, 2009, reflecting increases of approximately $599 million, $748 million, $343 million, $88 million and $5 million related to 2010, 2011, 2012, 2013 and 2014 and beyond sales commitments, respectively, offset by the fulfillment of approximately $1,578 million of 2009 commitments during the nine months ended September30, 2009. The increases were primarily due to increased overall hedging activity in the normal course of business. See Note 8 Derivative Financial Instruments for additional information regarding Generations hedging program. Pursuant to a PPA with Public Service Company of Oklahoma, a subsidiary of American Electric Power, dated as of April17, 2009, Generation agreed to sell its rights to up to 520 megawatts (MW), or approximately two-thirds, of the capacity, energy and ancillary services supplied under its existing long-term contract with Green Country Energy, LLC. The delivery of power under the PPA is to commence June1, 2012 and run through February28, 2022. An Order approving the PPA was entered by the Oklahoma Corporation Commission on September11, 2009.The Order became final in October 2009. In May 2009, ComEd entered into procurement contracts to enable ComEd to meet a portion of its customers electricity requirements for the period from June 2009 to May 2011. These contracts resulted in an increase in ComEds energy commitments of $88 million for the remainder of 2009, $269 million for 2010 and $31 million for 2011. See Note 3 Regulatory Issues for further information. In May 2009, ComEd entered into contracts for the procurement of RECs totaling approximately $31 million. Through September30, 2009, $18 million had been purchased, with $13 million to be purchased by May31, 2010. See Note 3 Regulatory Issues for additional information. In June and September 2009, PECO entered into procurement contracts to enable PECO to meet a portion of its customers electricity requirements for 2011, 2012 and 2013. PECOs energy commitments related to these contracts are $594 million for 2011, $294 million for 2012 and $50 million for 2013. See Note 3 Regulatory Issues for further information. PECOs AEC purchase commitments were not significant as of December31, 2008. As of September30, 2009, PECOs AEC purchase commitments were $6 millionfor 2010, $9 million for 2011, 2012 and 2013 and $4 million for 2014.See Note 3 Regulatory Issues for additional info

15. Supplemental Financial I

15. Supplemental Financial Information (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
15. Supplemental Financial Information (Exelon, Generation, ComEd and PECO)	15.Supplemental Financial Information (Exelon, Generation, ComEd and PECO) Supplemental Statement of Operations Information The following tables provide additional information regarding the components of depreciation, amortization and accretion, and other, net within the Consolidated Statements of Operations and Comprehensive Income of Exelon, Generation, ComEd and PECO for the three and nine months ended September30, 2009 and 2008: Three Months Ended September30, 2009 Exelon Generation ComEd PECO Depreciation, amortization and accretion Property, plant and equipment $ 242 $ 74 $ 112 $ 42 Regulatory assets(a) 243 13 230 Nuclear fuel(b) 143 143 Asset retirement obligation accretion(c) 54 54 Total depreciation, amortization and accretion $ 682 $ 271 $ 125 $ 272 (a) For PECO, primarily reflects CTC amortization. (b) Included in fuel expense on the Registrants Consolidated Statements of Operations. (c) Included in operating and maintenance expense on the Registrants Consolidated Statements of Operations. Nine Months Ended September30, 2009 Exelon Generation ComEd PECO Depreciation, amortization and accretion Property, plant and equipment $ 716 $ 223 $ 332 $ 121 Regulatory assets(a) 644 39 605 Nuclear fuel(b) 415 415 Asset retirement obligation accretion(c) 160 159 1 Total depreciation, amortization and accretion $ 1,935 $ 797 $ 372 $ 726 (a) For PECO, primarily reflects CTC amortization. (b) Included in fuel expense on the Registrants Consolidated Statements of Operations. (c) Included in operating and maintenance expense on the Registrants Consolidated Statements of Operations. Three Months Ended September30, 2008 Exelon Generation ComEd PECO Depreciation, amortization and accretion Property, plant and equipment $ 220 $ 58 $ 110 $ 41 Regulatory assets(a) 211 9 202 Nuclear fuel(b) 142 142 Asset retirement obligation accretion(c) 56 56 Total depreciation, amortization and accretion $ 629 $ 256 $ 119 $ 243 (a) For PECO, primarily reflects CTC amortization. (b) Included in fuel expense on the Registrants Consolidated Statements of Operations. (c) Included in operating and maintenance expense on the Registrants Consolidated Statements of Operations. Nine Months Ended September30, 2008 Exelon Generation ComEd PECO Depreciation, amortization and accretion Property, plant and equipment $ 669 $ 202 $ 317 $ 118 Regulatory assets(a) 561 26 535 Nuclear fuel(b) 320 320

16. Segment Information

16. Segment Information (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
16. Segment Information (Exelon, Generation, ComEd and PECO)	16.Segment Information (Exelon, Generation, ComEd and PECO) Exelon has three reportable and operating segments: Generation, ComEd and PECO. Exelon evaluates the performance of its segments based on net income. Generation, ComEd and PECO each represent a single reportable segment; as such, no separate segment information is provided for these Registrants. Three Months Ended September30, 2009 and 2008 Exelons segment information for the three months ended September30, 2009 and 2008 is as follows: Generation ComEd PECO Other Intersegment Eliminations Consolidated Total revenues(a): 2009 $ 2,445 $ 1,475 $ 1,327 $ 179 $ (1,087 ) $ 4,339 2008 3,073 1,729 1,441 167 (1,182 ) 5,228 Intersegment revenues(b): 2009 $ 911 $ 1 $ 1 $ 178 $ (1,088 ) $ 3 2008 1,014 2 167 (1,183 ) Income(loss)fromcontinuingoperations before income taxes: 2009 $ 1,213 $ 102 $ 122 $ (82 ) $ $ 1,355 2008 942 52 133 (29 ) (52 ) 1,046 Income taxes: 2009 $ 556 $ 56 $ 30 $ (43 ) $ (1 ) $ 598 2008 307 19 43 (4 ) (19 ) 346 Income (loss) from continuing operations: 2009 $ 657 $ 46 $ 92 $ (39 ) $ 1 $ 757 2008 635 33 90 (26 ) (32 ) 700 Income(loss)fromdiscontinuedoperations: 2009 $ $ $ $ $ $ 2008 Net income (loss): 2009 $ 657 $ 46 $ 92 $ (39 ) $ 1 $ 757 2008 635 33 90 (26 ) (32 ) 700 Total assets: September 30, 2009 $ 22,871 $ 20,521 $ 9,107 $ 6,156 $ (9,153 ) $ 49,502 December 31, 2008 20,355 19,237 9,169 5,992 (6,936 ) 47,817 (a) For the three months ended September30, 2009 and 2008, utility taxes of $64million and $69 million, respectively, are included in revenues and expenses for ComEd. For the three months ended September30, 2009 and 2008, utility taxes of $70million and $77million, respectively, are included in revenues and expenses for PECO. (b) The intersegment profit associated with Generations sale of RECs to ComEd and AECs to PECO is not eliminated in consolidation due to the recognition of intersegment profit in accordance with regulatory accounting guidance. See Note 3 Regulatory Issues for additional information on RECs and AECs. Nine Months Ended September30, 2009 and 2008 Exelons segment information for the nine months ended September30, 2009 and 2008 is as follows: Generation ComEd PECO Other Intersegment Eliminations Consolidated Total revenues(a): 2009 $ 7,424 $ 4,417 $ 4,045 $ 570 $ (3,254 ) $ 13,202 2008 8,311

17. Related-Party Transactio

17. Related-Party Transactions (Exelon, Generation, ComEd and PECO)
	9 Months Ended Sep. 30, 2009
Notes to Financial Statements [Abstract]
17. Related-Party Transactions (Exelon, Generation, ComEd and PECO)	17.Related-Party Transactions (Exelon, Generation, ComEd and PECO) Exelon The financial statements of Exelon include related-party transactions as presented in the tables below: Three Months Ended September30, Nine Months Ended September30, 2009 2008 2009 2008 Operating revenues from affiliates ComEd Transitional Funding Trust(a) $ $ 1 $ $ 2 PETT 1 1 2 3 ComEd(b) (4 ) PECO(b) 7 9 Other 1 Total operating revenues from affiliates $ 4 $ 2 $ 11 $ 6 Fuel purchases from related parties Keystone Fuels, LLC $ 16 $ 20 $ 46 $ 52 Conemaugh Fuels, LLC 16 16 52 42 Total fuel purchases from related parties $ 32 $ 36 $ 98 $ 94 Interest expense to affiliates, net ComEd Transitional Funding Trust(a) $ $ 1 $ $ 6 ComEd Financing II(c) 2 ComEd Financing III 3 3 10 10 PETT 11 24 43 80 PECO Trust III 2 2 5 5 PECO Trust IV 1 1 4 4 Other 1 (1 ) Total interest expense to affiliates, net $ 18 $ 31 $ 62 $ 106 Equity in losses of unconsolidated affiliates and investments ComEd Funding LLC(a) $ $ (2 ) $ $ (7 ) PETT (6 ) (4 ) (19 ) (11 ) NuStart Energy Development, LLC (1 ) (2 ) (1 ) Other (1 ) Total equity in losses of unconsolidated affiliates and investments $ (8 ) $ (6 ) $ (21 ) $ (19 ) (a) In the fourth quarter of 2008, ComEd fully paid its long-term debt obligations to the ComEd Transitional Funding Trust and received its current receivable from the ComEd Transitional Funding Trust. ComEd Funding LLC liquidated its investment in the ComEd Transitional Funding Trust and ComEd liquidated its investment in ComEd Funding LLC. (b) The intersegment profit associated with Generations sale of RECs to ComEd and AECs to PECO is not eliminated in consolidation due to the recognition of intersegment profit in accordance with regulatory accounting guidance. See Note 3 Regulatory Issues for additional information on RECs and AECs. (c) ComEd Financing II was liquidated and dissolved upon repayment of the debt in 2008. As of September30, 2009 As of December31, 2008 Investments in affiliates ComEd Financing III $ 6 $ 6 PETT 10 30 PECO Energy Capital Corporation 4 4 PECO Trust IV 5 5 Total investments in affiliates $ 25 $

Document Information

Document Information
	9 Months Ended Sep. 30, 2009
Document Information [Text Block]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	2009-09-30

Entity Information

Entity Information (USD $)
	9 Months Ended Sep. 30, 2009
Entity [Text Block]
Trading Symbol	EXC
Entity Registrant Name	EXELON CORP
Entity Central Index Key	0001109357
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	659,377,386
EXELON GENERATION CO LLC
Entity [Text Block]
Entity Registrant Name	EXELON GENERATION CO LLC
Entity Central Index Key	0001168165
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0
COMMONWEALTH EDISON CO
Entity [Text Block]
Entity Registrant Name	COMMONWEALTH EDISON CO
Entity Central Index Key	0000022606
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	127,016,519
PECO ENERGY CO
Entity [Text Block]
Entity Registrant Name	PECO ENERGY CO
Entity Central Index Key	0000078100
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	170,478,507