CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents		$ 352	$ 352
Restricted cash and cash equivalents		109	176
Accounts receivable (less reserve:)
Customer		241	186
Other		56	103
Accounts receivable from affiliates		0	36
Unbilled revenues		138	218
Fuel, materials and supplies		481	455
Prepayments		38	70
Price risk management assets		803	1,079
Assets of discontinued operations		394	0
Other current assets		9	26
Total Current Assets		2,621	2,701
Investments
Nuclear plant decommissioning trust funds		958	950
Other investments		27	30
Total Investments		985	980
Property, Plant and Equipment
Generation		13,170	11,318
Nuclear fuel		652	624
Other		315	293
Less: accumulated depreciation		6,348	6,242
Property, plant and equipment, net		7,789	5,993
Construction work in progress		374	443
Total Property, Plant and Equipment, net		8,163	6,436
Other Noncurrent Assets
Goodwill		470	72
Other intangibles		304	257
Price risk management assets		232	239
Other noncurrent assets		87	75
Total Other Noncurrent Assets		1,093	643
Total Assets		12,862	10,760
Current Liabilities
Short-term debt		0	630
Long-term debt due within one year		884	535
Accounts payable		281	361
Accounts payable to affiliates		0	50
Taxes		39	28
Interest		49	16
Price risk management liabilities		761	1,024
Liabilities of discontinued operations		18	0
Other current liabilities		264	246
Total Current Liabilities		2,296	2,890
Long-term Debt		3,175	1,683
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,483	1,223
Investment tax credits		26	27
Price risk management liabilities		199	193
Accrued pension obligations		247	299
Asset retirement obligations		474	415
Other deferred credits and noncurrent liabilities		136	123
Total Deferred Credits and Other Noncurrent Liabilities		$ 2,565	$ 2,280
Commitments and Contingent Liabilities
Equity
Predecessor Member's Equity	[1]	$ 0	$ 3,930
Common Stock - $0.001 par value	[2]	0	0
Additional paid-in capital		4,719	0
Earnings reinvested		90	0
Accumulated other comprehensive income (loss)		17	(23)
Total Equity		4,826	3,907
Total Liabilities and Equity		12,862	10,760
Talen Energy Supply
Current Assets
Cash and cash equivalents		352	352
Restricted cash and cash equivalents		109	176
Accounts receivable (less reserve:)
Customer		241	186
Other		56	103
Accounts receivable from affiliates		0	36
Unbilled revenues		138	218
Fuel, materials and supplies		481	455
Prepayments		38	70
Price risk management assets		803	1,079
Assets of discontinued operations		394	0
Other current assets		9	26
Total Current Assets		2,621	2,701
Investments
Nuclear plant decommissioning trust funds		958	950
Other investments		27	30
Total Investments		985	980
Property, Plant and Equipment
Generation		13,170	11,318
Nuclear fuel		652	624
Other		315	293
Less: accumulated depreciation		6,348	6,242
Property, plant and equipment, net		7,789	5,993
Construction work in progress		374	443
Total Property, Plant and Equipment, net		8,163	6,436
Other Noncurrent Assets
Goodwill		470	72
Other intangibles		304	257
Price risk management assets		232	239
Other noncurrent assets		87	75
Total Other Noncurrent Assets		1,093	643
Total Assets		12,862	10,760
Current Liabilities
Short-term debt		0	630
Long-term debt due within one year		884	535
Accounts payable		281	361
Accounts payable to affiliates		0	50
Taxes		39	28
Interest		49	16
Price risk management liabilities		761	1,024
Liabilities of discontinued operations		18	0
Other current liabilities		264	246
Total Current Liabilities		2,296	2,890
Long-term Debt		3,175	1,683
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,483	1,223
Investment tax credits		26	27
Price risk management liabilities		199	193
Accrued pension obligations		247	299
Asset retirement obligations		474	415
Other deferred credits and noncurrent liabilities		136	123
Total Deferred Credits and Other Noncurrent Liabilities		$ 2,565	$ 2,280
Commitments and Contingent Liabilities
Equity
Member's Equity		$ 4,826	$ 3,907
Total Liabilities and Equity		$ 12,862	$ 10,760

[1] Represents Talen Energy Supply's predecessor member's equity prior to the June 1, 2015 spinoff transaction. Upon completion of the spinoff, the predecessor member's equity was transferred to Talen Energy Corporation's additional paid-in capital. See Note 1 for additional information on the spinoff.

[2] 1,000,000 shares authorized; 128,509 shares issued and outstanding at June 30, 2015.