v3.4.0.3
Condensed Consolidated Income Statements (Unaudited) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Income Statement [Abstract]    
Operating revenues $ 2,194.8 $ 1,387.9
Operating expenses    
Cost of sales 838.9 613.9
Other operation and maintenance 531.5 280.7
Depreciation and amortization 187.9 102.6
Property and revenue taxes 47.2 31.9
Total operating expenses 1,605.5 1,029.1
Operating income 589.3 358.8
Equity in earnings of transmission affiliate 38.5 16.1
Other income, net 32.7 3.0
Interest expense 100.9 59.4
Other expense (29.7) (40.3)
Income before income taxes 559.6 318.5
Income tax expense 213.1 122.4
Net income 346.5 196.1
Preferred stock dividends of subsidiary 0.3 0.3
Net income attributed to common shareholders $ 346.2 $ 195.8
Earnings per share    
Basic (in dollars per share) $ 1.10 $ 0.87
Diluted (in dollars per share) $ 1.09 $ 0.86
Weighted average common shares outstanding    
Basic (in shares) 315.7 225.5
Diluted (in shares) 317.1 227.3
Dividends per share of common stock (in dollars per share) $ 0.495 $ 0.4225