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Corporate Restructuring and Plant Retirements (Tables)

12 Months Ended

Dec. 31, 2011

Corporate Restructuring And Plant Retirements Tables [Abstract]

Total severance benefits costs, recorded as operating and maintenance expense

For the Year Ended December 31,		Generation		ComEd		PECO		Other		Exelon
2011 - Plant retirements	$	4	$	¯	$	¯	$	¯	$	4
2010 - Plant retirements		4		¯		¯		¯		4
2009 - Plant retirements		7		¯		¯		¯		7
2009 - Corporate restructuring (a)(b)		11		19		3		1		34

(a) The amounts above include $7 million, $4 million, and $2 million at Generation, ComEd and PECO, respectively, for amounts billed through intercompany allocations for the year ended December 31, 2009.

(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 year ended December 31, 2009. 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.

Activity of severance obligations for the corporate restructuring (excluding obligations recorded in equity)

Severance Benefits Obligation		Generation		ComEd		PECO		Other		Exelon
Balance at January 1, 2010	$	3	$	7	$	1	$	8	$	19

Cash payments		(3)		(7)		(1)		(7)		(18)

Balance at December 31, 2010		¯		¯		¯		1		1

Cash payments		¯		¯		¯		(1)		(1)

Balance at December 31, 2011	$	¯	$	¯	$	¯	$	¯	$	¯

Activity of severance obligations for the announced Cromby and Eddystone retirements

Severance Benefits Obligation		Exelon and Generation
Balance at January 1, 2010	$	7

Severance charges recorded		4
Cash payments		(1)
Other adjustments		(3)

Balance at December 31, 2010		7

Severance charges recorded		4
Cash payments		(4)

Balance at December 31, 2011	$	7

- Definition

Tabular disclosure of restructuring and related costs by type of restructuring including the description of the restructuring costs, such as the expected cost; the costs incurred during the period; the cumulative costs incurred as of the balance sheet date; the income statement caption within which the restructuring charges recognized for the period are included; and changes to an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost.

+ References+ Details