XML 135 R90.htm IDEA: XBRL DOCUMENT v3.7.0.1
Common Stock (Earnings Per Share Data)(Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Common Stock [Line Items]    
Income from continuing operations attributable to Duke Energy common stockholders excluding impact of participating securities $ 715 $ 574
Average shares, basic 700 689
Average shares, diluted 700 689
EPS, basic (usd per share) $ 1.02 $ 0.83
EPS, diluted (usd per share) $ 1.02 $ 0.83
Number of stock options and performance and unvested stock awards excluded from the dilutive securities calculation 2 2
Dividends declared per share (usd per share) $ 0.855 $ 0.825