Segment and Related Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Reconciliation of Segments to Consolidated

Financial data for the segments and reconciliation to consolidated results for the periods ended September 30 are:

	Three Months						Nine Months
	2016			2015			2016			2015
Talen Energy Corporation - Income Statement Data
Revenues from external customers (a)
East	$	1,060		$	1,175		$	2,783		$	3,117
West	178			145			325			242
Total	$	1,238		$	1,320		$	3,108		$	3,359
Operating Income (Loss)
East	$	221		$	(345	)	$	765		$	33
West	16			39			(64		)	18
Other	(44		)	(40		)	(149		)	(184		)
Total	$	193		$	(346	)	$	552		$	(133	)

	Three Months						Nine Months
	2016			2015			2016			2015
Talen Energy Supply - Income Statement Data
Revenues from external customers (a)
East	$	1,060		$	1,175		$	2,783		$	3,117
West	178			145			325			242
Total	$	1,238		$	1,320		$	3,108		$	3,359
Operating Income (Loss)
East	$	221		$	(345	)	$	765		$	33
West	16			39			(64		)	18
Other	(42		)	(40		)	(136		)	(184		)
Total	$	195		$	(346	)	$	565		$	(133	)

	Talen Energy Corporation				Talen Energy Supply
Balance Sheet Data	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Assets
East	$	9,741	$	11,430	$	9,741	$	11,430
West	1,299		1,231		1,299		1,231
Other (b)	1,389		148		1,398		148
Total Assets	$	12,429	$	12,809	$	12,438	$	12,809

(a) Includes unrealized gains and losses from derivatives. See Note 14 for additional information.

(b) Primarily consists of unallocated items, including cash and PP&E.