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Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Utility: |  |
Electric | $ 675.8 | $ 633.2
Gas | 240.7 | 197.3
Other | 22.8 | 17.2
Non-regulated | 13.5 | 11.9
Total operating revenues | 952.8 | 859.6
Utility: |  |
Electric production fuel and energy purchases | 213.9 | 179.1
Purchased electric capacity | 24.8 | 57.0
Electric transmission service | 114.1 | 103.7
Cost of gas sold | 161.9 | 128.0
Other operation and maintenance | 161.0 | 150.2
Non-regulated operation and maintenance | 1.3 | 2.2
Depreciation and amortization | 95.5 | 92.6
Taxes other than income taxes | 26.1 | 26.1
Total operating expenses | 798.6 | 738.9
Operating income | 154.2 | 120.7
Interest expense and other: |  |
Interest expense | 45.2 | 42.6
Equity income from unconsolidated investments, net | (11.4) | (10.7)
Allowance for funds used during construction | (9.1) | (5.6)
Interest income and other | (1.7) | (0.8)
Total interest expense and other | 23.0 | 25.5
Income from continuing operations before income taxes | 131.2 | 95.2
Income tax expense (benefit) | 20.6 | 12.1
Income from continuing operations, net of tax | 110.6 | 83.1
Income (loss) from discontinued operations, net of tax | 0 | (3.0)
Net income (loss) | 110.6 | 80.1
Preferred dividend requirements of subsidiaries | 2.6 | 10.2
Net income (loss) attributable to common shareowners | 108.0 | 69.9
Weighted average number of common shares outstanding (basic and diluted) (in shares) | 110.8 | 110.8
Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted): |  |
Income from continuing operations, net of tax (in dollars per share) | $ 0.97 | $ 0.66
Income (loss) from discontinued operations, net of tax (in dollars per share) | $ 0.00 | $ (0.03)
Net income (in dollars per share) | $ 0.97 | $ 0.63
Amounts attributable to common shareowners: |  |
Income from continuing operations, net of tax | 108.0 | 72.9
Income (loss) from discontinued operations, net of tax | 0 | (3.0)
Net income (loss) attributable to common shareowners | 108.0 | 69.9
Dividends declared per common share (in dollars per share) | $ 0.51 | $ 0.47
IPL [Member] |  |
Utility: |  |
Electric | 374.2 | 350.2
Gas | 135.7 | 114.3
Other | 19.0 | 13.4
Total operating revenues | 528.9 | 477.9
Utility: |  |
Electric production fuel and energy purchases | 115.2 | 96.7
Purchased electric capacity | 24.8 | 41.4
Electric transmission service | 83.6 | 74.6
Cost of gas sold | 88.1 | 72.1
Other operation and maintenance | 97.2 | 90.5
Depreciation and amortization | 48.7 | 47.6
Taxes other than income taxes | 13.8 | 13.9
Total operating expenses | 471.4 | 436.8
Operating income | 57.5 | 41.1
Interest expense and other: |  |
Interest expense | 22.5 | 19.6
Allowance for funds used during construction | (6.0) | (3.8)
Interest income and other | 0 | (0.1)
Total interest expense and other | 16.5 | 15.7
Income from continuing operations before income taxes | 41.0 | 25.4
Income tax expense (benefit) | (5.0) | (6.1)
Net income (loss) | 46.0 | 31.5
Preferred dividend requirements of subsidiaries | 2.6 | 8.6
Net income (loss) attributable to common shareowners | 43.4 | 22.9
Amounts attributable to common shareowners: |  |
Net income (loss) attributable to common shareowners | 43.4 | 22.9
WPL [Member] |  |
Utility: |  |
Electric | 301.6 | 283.0
Gas | 105.0 | 83.0
Other | 3.8 | 3.8
Total operating revenues | 410.4 | 369.8
Utility: |  |
Electric production fuel and energy purchases | 98.7 | 82.4
Purchased electric capacity | 0 | 15.6
Electric transmission service | 30.5 | 29.1
Cost of gas sold | 73.8 | 55.9
Other operation and maintenance | 63.8 | 59.7
Depreciation and amortization | 44.7 | 43.1
Taxes other than income taxes | 11.2 | 11.3
Total operating expenses | 322.7 | 297.1
Operating income | 87.7 | 72.7
Interest expense and other: |  |
Interest expense | 21.1 | 21.3
Equity income from unconsolidated investments, net | (11.4) | (10.8)
Allowance for funds used during construction | (3.1) | (1.8)
Interest income and other | 0 | (0.1)
Total interest expense and other | 6.6 | 8.6
Income from continuing operations before income taxes | 81.1 | 64.1
Income tax expense (benefit) | 26.3 | 20.5
Net income (loss) | 54.8 | 43.6
Preferred dividend requirements of subsidiaries | 0 | 1.6
Net income (loss) attributable to common shareowners | 54.8 | 42.0
Amounts attributable to common shareowners: |  |
Net income (loss) attributable to common shareowners | $ 54.8 | $ 42.0

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