Goodwill Impairment	3 Months Ended
Mar. 31, 2014
Goodwill and Intangible Asset Impairment [Abstract]
Goodwill Impairment	12. Goodwill Impairment During the first quarter of 2014, we performed an interim impairment test on the $135.8 million in goodwill at our DPLER reporting unit. The DPLER reporting unit was identified as being "at risk" during the fourth quarter of 2013. The impairment indicators arose based on market information available regarding actual and proposed sales of competitive retail marketers, which indicated a significant decline in valuations during the first quarter of 2014. In Step 1 of the interim impairment test, the fair value of the reporting unit was determined to be less than its carrying amount under both the market approach and the income approach using a discounted cash flow valuation model. The significant assumptions included commodity price curves, estimated electricity to be demanded by its customers, changes in its customer base through attrition and expansion, discount rates, the assumed tax structure and the level of working capital required to run the business. In the preliminary Step 2, the goodwill was determined to have an implied fair value of zero after the hypothetical purchase price allocation and we recognized a full impairment of the $135.8 million in goodwill at the DPLER reporting unit during the three months ended March 31, 2014. The full impairment represents our best estimate of the impairment loss based on the latest information available and the results of the preliminary Step 2 test. The Step 2 test is incomplete, due to the significant amount of work required to calculate the implied fair value of goodwill for a competitive retail marketer and due to the timing of the identification of the interim impairment indicator. The significant items in the Step 2 test that are incomplete include, but are not limited to, the assumed tax structure, the valuation of customer relationship and customer contract intangible assets, trade name valuation and valuation of other executory contracts. In the second quarter of 2014, we expect to finalize the measurement of the goodwill impairment charge.

12. Goodwill Impairment

During the first quarter of 2014, we performed an interim impairment test on the $135.8 million in goodwill at our DPLER reporting unit. The DPLER reporting unit was identified as being "at risk" during the fourth quarter of 2013. The impairment indicators arose based on market information available regarding actual and proposed sales of competitive retail marketers, which indicated a significant decline in valuations during the first quarter of 2014.

In Step 1 of the interim impairment test, the fair value of the reporting unit was determined to be less than its carrying amount under both the market approach and the income approach using a discounted cash flow valuation model. The significant assumptions included commodity price curves, estimated electricity to be demanded by its customers, changes in its customer base through attrition and expansion, discount rates, the assumed tax structure and the level of working capital required to run the business.

In the preliminary Step 2, the goodwill was determined to have an implied fair value of zero after the hypothetical purchase price allocation and we recognized a full impairment of the $135.8 million in goodwill at the DPLER reporting unit during the three months ended March 31, 2014. The full impairment represents our best estimate of the impairment loss based on the latest information available and the results of the preliminary Step 2 test. The Step 2 test is incomplete, due to the significant amount of work required to calculate the implied fair value of goodwill for a competitive retail marketer and due to the timing of the identification of the interim impairment indicator. The significant items in the Step 2 test that are incomplete include, but are not limited to, the assumed tax structure, the valuation of customer relationship and customer contract intangible assets, trade name valuation and valuation of other executory contracts. In the second quarter of 2014, we expect to finalize the measurement of the goodwill impairment charge.