Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2011

Regulatory Matters [Abstract]

Regulatory Assets and Liabilities

				At	At
	Type of	Amortization		September 30,	December 31,
$ in millions	Recovery (a)	Through		2011	2010
Regulatory Assets:
Deferred recoverable income taxes	B/C	Ongoing	$	26.6	$	29.9
Pension benefits	C	Ongoing		76.6		81.1
Unamortized loss on reacquired debt	C	Ongoing		13.3		14.3
Regional transmission organization costs	D	2014		4.4		5.5
TCRR, transmission, ancillary and other PJM-related costs	F	Ongoing		7.7		11.8
Deferred storm costs - 2008	D			17.7		16.9
Power plant emission fees	C	Ongoing		7.1		6.6
CCEM smart grid and advanced metering infrastructure costs	D			6.6		6.6
CCEM energy efficiency program costs	F	Ongoing		8.0		4.8
Other costs				10.2		11.5
Total regulatory assets			$	178.2	$	189.0
Regulatory Liabilities:
Estimated costs of removal - regulated property			$	111.7	$	107.9
Postretirement benefits				5.4		6.1
Fuel and purchased power recovery costs	C	Ongoing		16.0		10.0
Total regulatory liabilities			$	133.1	$	124.0

(a)	B – Balance has an offsetting liability resulting in no impact on rate base. C – Recovery of incurred costs without a rate of return.
	D – Recovery not yet determined, but is probable of occurring in future rate proceedings. F – Recovery of incurred costs plus rate of return.