|
Commitments and Contingencies (Schedule of Reserves) (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Loss Contingencies [Line Items] | ||
| Reserves for legal matters | $ 227 | $ 204 |
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Progress Energy [Member]
|
||
| Loss Contingencies [Line Items] | ||
| Reserves for legal matters | 70 | 78 |
|
Duke Energy Progress [Member]
|
||
| Loss Contingencies [Line Items] | ||
| Reserves for legal matters | 9 | 10 |
|
Duke Energy Florida [Member]
|
||
| Loss Contingencies [Line Items] | ||
| Reserves for legal matters | $ 41 | $ 43 |