|
Variable Interest Entities (Receivables Sold)(Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
|
Duke Energy Ohio [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| CRC Gross Receivables Sold | $ 304 | $ 282 |
| CRC Retained Interests | 115 | 97 |
| CRC Net Receivables Sold | 189 | 185 |
|
Duke Energy Indiana [Member]
|
||
| Variable Interest Entity [Line Items] | ||
| CRC Gross Receivables Sold | 317 | 289 |
| CRC Retained Interests | 135 | 116 |
| CRC Net Receivables Sold | $ 182 | $ 173 |