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Condensed Consolidated Statements Of Common Stockholder's Equity And Comprehensive Income - Ohio (USD $)
In Millions
Duke Energy Ohio [Member]
Common Stock [Member]
Duke Energy Ohio [Member]
Additional Paid-In Capital [Member]
Duke Energy Ohio [Member]
Retained Earnings [Member]
Duke Energy Ohio [Member]
Net (Losses) Gains On Cash Flow Hedges [Member]
Duke Energy Ohio [Member]
Pension And OPEB Related Adjustments To AOCI [Member]
Duke Energy Ohio [Member]
Retained Earnings [Member]
Net (Losses) Gains On Cash Flow Hedges [Member]
Pension And OPEB Related Adjustments To AOCI [Member]
Total
Balance at Dec. 31, 2009$ 762$ 5,570$ (405)$ 1$ (30)$ 5,898    
Net income (loss)  (453)  (453)893  894
Other comprehensive income (loss)          
Reclassification into earnings from cash flow hedges   (1)[1] (1)[1] (2)[2] (2)[2]
Pension and OPEB related adjustments to AOCI    1[3]1[3]  19[4]19[4]
Total comprehensive income (loss)     (453)   971
Dividends to parent          
Balance at Sep. 30, 20107625,570(858) (29)5,445    
Balance at Jun. 30, 2010          
Net income (loss)     176   666
Other comprehensive income (loss)          
Pension and OPEB related adjustments to AOCI[5]         4
Total comprehensive income (loss)         765
Balance at Sep. 30, 20107625,570   5,445    
Balance at Dec. 31, 20107625,570(846) (22)5,464   22,522
Net income (loss)     1571,418  1,424
Other comprehensive income (loss)          
Reclassification into earnings from cash flow hedges[2]       (3) (3)
Pension and OPEB related adjustments to AOCI[4]        (6)(6)
Total comprehensive income (loss)         1,226
Net income and total comprehensive income  157  157    
Dividends to parent (485)   (485)    
Balance at Sep. 30, 20117625,085(689) (22)5,136   22,794
Balance at Jun. 30, 2011          
Net income (loss)     51   470
Other comprehensive income (loss)          
Reclassification into earnings from cash flow hedges[6]         1
Pension and OPEB related adjustments to AOCI[6]         1
Total comprehensive income (loss)         182
Balance at Sep. 30, 2011$ 762   $ (22)$ 5,136   $ 22,794
[1]Net of insignificant tax benefit in 2010.
[2]Net of $1 tax expense in 2011 and insignificant tax benefit in 2010.
[3]Net of insignificant tax expense in 2010.
[4]Net of $3 tax benefit in 2011 and $5 tax expense in 2010.
[5]Net of $5 million tax expense.
[6]Net of insignificant tax expense.