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v3.3.1.900

Condensed Parent Company Financial Statements (Condensed Statements Of Income) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating revenues | $ 740.1 | $ 898.9 | $ 717.2 | $ 897.4 | $ 804.1 | $ 843.1 | $ 750.3 | $ 952.8 | $ 3,253.6 | $ 3,350.3 | $ 3,276.8
Operating expenses |  |  |  |  |  |  |  |  | 2,676.6 | 2,806.7 | 2,742.9
Operating income (loss) | $ 79.2 | $ 235.9 | $ 109.0 | $ 152.9 | $ 91.3 | $ 194.8 | $ 103.3 | $ 154.2 | 577.0 | 543.6 | 533.9
Interest expense and other: |  |  |  |  |  |  |  |  |  |  |
Equity earnings from consolidated subsidiaries |  |  |  |  |  |  |  |  | (33.8) | (40.4) | (43.7)
Interest expense |  |  |  |  |  |  |  |  | 187.1 | 180.6 | 172.8
Total interest expense and other |  |  |  |  |  |  |  |  | 115.7 | 103.6 | 97.9
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  | 461.3 | 440.0 | 436.0
Income tax benefit |  |  |  |  |  |  |  |  | 70.4 | 44.3 | 53.9
Net income |  |  |  |  |  |  |  |  | 388.4 | 393.3 | 376.2
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2.0 | 2.0 | 2.0
Operating expenses |  |  |  |  |  |  |  |  | 3.0 | 3.0 | 1.0
Operating income (loss) |  |  |  |  |  |  |  |  | (1.0) | (1.0) | 1.0
Interest expense and other: |  |  |  |  |  |  |  |  |  |  |
Equity earnings from consolidated subsidiaries |  |  |  |  |  |  |  |  | (379.0) | (388.0) | (361.0)
Interest expense |  |  |  |  |  |  |  |  | 3.0 | 9.0 | 11.0
Interest income |  |  |  |  |  |  |  |  | (3.0) | (2.0) | (2.0)
Total interest expense and other |  |  |  |  |  |  |  |  | (379.0) | (381.0) | (352.0)
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  | 378.0 | 380.0 | 353.0
Income tax benefit |  |  |  |  |  |  |  |  | (1.0) | (3.0) | (5.0)
Net income |  |  |  |  |  |  |  |  | $ 379.0 | $ 383.0 | $ 358.0

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