XML 80 R56.htm IDEA: XBRL DOCUMENT v2.4.0.8
Regulatory Matters (Schedule of MISO Exit fees)(Details) (Duke Energy Ohio [Member], RTO Realignment [Member], USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Duke Energy Ohio [Member] | RTO Realignment [Member]
 
Restructuring Reserve [Roll Forward]  
Balance, beginning of period $ 95
Provision / Adjustments 3
Cash Reductions (3)
Balance, end of period $ 95