Exelon 2014 Annual Report Download - page 85

The changes in heating and cooling degree days in ComEd’s service territory for the years ended December 31, 2013 and 2012
consisted of the following:
Twelve Months Ended December 31, % Change
Heating and Cooling Degree-Days 2013 2012 Normal From 2012 From Normal
Heating Degree-Days .............................. 6,603 5,065 6,341 30.4% 4.1%
Cooling Degree-Days .............................. 933 1,324 842 (29.5)% 10.8%
Volume
Revenue net of purchased power expense decreased as a result of lower delivery volume, exclusive of the effects of weather, for the
year ended December 31, 2013, reflecting decreased average usage per residential customer as compared to the same period in
2012.
Electric Distribution Revenue
During the year ended December 31, 2013, ComEd recorded increased revenue of $168 million under EIMA, primarily due to
increased capital investments, increased operating expenses, and higher allowed ROE. These amounts exclude the discrete
impacts of the 2012 Distribution Rate Case Orders discussed separately below. See Note 3—Regulatory Matters of the Combined
Notes to Consolidated Financial Statements for additional information.
Discrete Impacts of the 2012 Distribution Rate Case Orders
On October 3, 2012, the ICC issued its final order related to ComEd’s 2011 formula rate proceeding under EIMA, which
reestablished ComEd’s position on the return on its pension asset, resulting in an increase to revenue in 2013. See Note 3—
Regulatory Matters of the Combined Notes to Consolidated Financial Statements for additional information.
Transmission Revenue
During the year ended December 31, 2013, ComEd recorded increased revenue during the year ended December 31, 2013 of $14
million, primarily due to increased capital investments and higher operating expenses. See Note 3—Regulatory Matters of the
Combined Notes to Consolidated Financial Statements for additional information.
Operating and Maintenance Expense
Year Ended
December 31, Increase
Year Ended
December 31, Increase
2014 2013
2014 vs.
2013 2013 2012
2013 vs.
2012
Operating and maintenance expense—baseline ..................... $1,211 $1,202 $ 9 $1,202 $1,199 $ 3
Operating and maintenance expense—regulatory required programs (a) . . 218 166 52 166 146 20
Total operating and maintenance expense .......................... $1,429 $1,368 $61 $1,368 $1,345 $23
(a) Operating and maintenance expense for regulatory required programs are recoveries from customers for costs of various legislative and regulatory programs on a full
and current basis through approved regulated rates. An equal and offsetting amount has been reflected in operating revenue.
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