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v3.6.0.2

Consolidated Income Statements - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |
Operating revenues | $ 7,472.3 | $ 5,926.1 | $ 4,997.1
Cost of sales | 2,647.4 | 2,240.1 | 2,259.4
Other operation and maintenance | 2,185.5 | 1,709.3 | 1,112.4
Depreciation and amortization | 762.6 | 561.8 | 391.4
Property and revenue taxes | 194.7 | 164.4 | 121.8
Total operating expenses | 5,790.2 | 4,675.6 | 3,885.0
Operating Income | 1,682.1 | 1,250.5 | 1,112.1
Equity in earnings of transmission affiliate | 146.5 | 96.1 | 66.0
Other income, net | 80.8 | 58.9 | 13.4
Interest expense | 402.7 | 331.4 | 240.3
Other expense | (175.4) | (176.4) | (160.9)
Income before income taxes | 1,506.7 | 1,074.1 | 951.2
Income tax expense | 566.5 | 433.8 | 361.7
Net income | 940.2 | 640.3 | 589.5
Preferred stock dividends of subsidiary | 1.2 | 1.8 | 1.2
Net income attributed to common shareholders | $ 939.0 | $ 638.5 | $ 588.3
Earnings Per Share (Basic) |  |  |
Earnings per common share (basic) (in dollars per share) | $ 2.98 | $ 2.36 | $ 2.61
Earnings Per Share (Diluted) |  |  |
Earnings per common share (diluted) (in dollars per share) | $ 2.96 | $ 2.34 | $ 2.59
Weighted Average Common Shares Outstanding (Basic) |  |  |
Basic (in shares) | 315.6 | 271.1 | 225.6
Weighted Average Common Shares Outstanding (Diluted) |  |  |
Diluted (in shares) | 316.9 | 272.7 | 227.5

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