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Statements Of Consolidated Income - USD ($)
shares in Thousands, $ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Net Revenues    
Gas Distribution $ 836.5 $ 737.8
Gas Transportation 338.6 301.7
Electric 421.7 392.2
Other 1.8 4.9
Gross Revenues 1,598.6 1,436.6
Cost of Sales (excluding depreciation and amortization) 552.3 496.5
Total Net Revenues 1,046.3 940.1
Operating Expenses    
Operation and maintenance 410.5 354.7
Depreciation and amortization 143.3 132.8
Gain on sale of assets and impairments, net 0.0 (0.1)
Other taxes 76.0 71.3
Total Operating Expenses 629.8 558.7
Operating Income 416.5 381.4
Other Income (Deductions)    
Interest expense, net (85.2) (90.5)
Other, net 1.2 0.7
Total Other Deductions (84.0) (89.8)
Net Income before Income Taxes 332.5 291.6
Income Taxes 121.2 105.0
Net Income $ 211.3 $ 186.6
Earnings Per Share    
Basic Earnings Per Share $ 0.65 $ 0.58
Diluted Earnings Per Share 0.65 0.58
Dividends Declared Per Common Share $ 0.35 $ 0.31
Basic Average Common Shares Outstanding 323,681 320,281
Diluted Average Common Shares 325,306 322,460