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Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Utility: |  |  |
Electric | $ 2,689.0 | $ 2,589.3 | $ 2,635.8
Gas | 464.8 | 396.3 | 476.7
Other | 71.3 | 56.7 | 62.0
Non-regulated | 51.7 | 52.2 | 46.9
Total operating revenues | 3,276.8 | 3,094.5 | 3,221.4
Utility: |  |  |
Electric production fuel and energy purchases | 725.0 | 712.3 | 764.5
Purchased electric capacity | 216.8 | 271.5 | 257.2
Electric transmission service | 418.3 | 341.3 | 323.8
Cost of gas sold | 276.7 | 217.2 | 295.2
Other operation and maintenance | 620.7 | 590.0 | 630.2
Non-regulated operation and maintenance | 14.9 | 11.9 | 18.0
Depreciation and amortization | 370.9 | 332.4 | 321.0
Taxes other than income taxes | 99.6 | 98.2 | 98.2
Total operating expenses | 2,742.9 | 2,574.8 | 2,708.1
Operating income | 533.9 | 519.7 | 513.3
Interest expense and other: |  |  |
Interest expense | 172.8 | 156.7 | 158.3
Equity (income) loss from unconsolidated investments, net | (43.7) | (41.3) | (39.3)
Allowance for funds used during construction | (30.8) | (21.9) | (12.0)
Interest income and other | (0.4) | (4.0) | (4.3)
Total interest expense and other | 97.9 | 89.5 | 102.7
Income from continuing operations before income taxes | 436.0 | 430.2 | 410.6
Income tax expense (benefit) | 53.9 | 89.4 | 69.2
Income from continuing operations, net of tax | 382.1 | 340.8 | 341.4
Loss from discontinued operations, net of tax | (5.9) | (5.1) | (19.5)
Net income | 376.2 | 335.7 | 321.9
Preferred dividend requirements of subsidiaries | 17.9 | 15.9 | 18.3
Net income (loss) attributable to common shareowners | 358.3 | 319.8 | 303.6
Weighted average number of common shares outstanding (basic and diluted) (000s) (in shares) | 110.8 | 110.8 | 110.7
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) | $ 3.29 | $ 2.93 | $ 2.92
Loss from discontinued operations, net of tax (in dollars per share) | $ (0.06) | $ (0.04) | $ (0.18)
Net income (in dollars per share) | $ 3.23 | $ 2.89 | $ 2.74
Amounts attributable to common shareowners: |  |  |
Income from continuing operations, net of tax | 364.2 | 324.9 | 323.1
Loss from discontinued operations, net of tax | (5.9) | (5.1) | (19.5)
Net income (loss) attributable to common shareowners | 358.3 | 319.8 | 303.6
IPL [Member] |  |  |
Utility: |  |  |
Electric | 1,491.8 | 1,371.1 | 1,408.3
Gas | 273.9 | 226.7 | 276.3
Other | 53.1 | 52.5 | 55.5
Total operating revenues | 1,818.8 | 1,650.3 | 1,740.1
Utility: |  |  |
Electric production fuel and energy purchases | 382.1 | 344.5 | 383.1
Purchased electric capacity | 155.2 | 153.7 | 147.7
Electric transmission service | 301.4 | 235.0 | 219.2
Cost of gas sold | 160.3 | 124.9 | 175.6
Other operation and maintenance | 362.3 | 350.0 | 375.0
Depreciation and amortization | 191.1 | 188.9 | 179.1
Taxes other than income taxes | 54.4 | 53.0 | 52.0
Total operating expenses | 1,606.8 | 1,450.0 | 1,531.7
Operating income | 212.0 | 200.3 | 208.4
Interest expense and other: |  |  |
Interest expense | 81.3 | 78.5 | 78.7
Allowance for funds used during construction | (21.0) | (8.4) | (5.8)
Interest income and other | (0.3) | (0.2) | (0.2)
Total interest expense and other | 60.0 | 69.9 | 72.7
Income from continuing operations before income taxes | 152.0 | 130.4 | 135.7
Income tax expense (benefit) | (37.9) | (19.8) | (3.6)
Net income | 189.9 | 150.2 | 139.3
Preferred dividend requirements of subsidiaries | 16.3 | 12.6 | 15.0
Net income (loss) attributable to common shareowners | 173.6 | 137.6 | 124.3
Amounts attributable to common shareowners: |  |  |
Net income (loss) attributable to common shareowners | 173.6 | 137.6 | 124.3
WPL [Member] |  |  |
Utility: |  |  |
Electric | 1,197.2 | 1,218.2 | 1,227.5
Gas | 190.9 | 169.6 | 200.4
Other | 18.2 | 4.2 | 6.5
Total operating revenues | 1,406.3 | 1,392.0 | 1,434.4
Utility: |  |  |
Electric production fuel and energy purchases | 342.9 | 367.8 | 381.4
Purchased electric capacity | 61.6 | 117.8 | 109.5
Electric transmission service | 116.9 | 106.3 | 104.6
Cost of gas sold | 116.4 | 92.3 | 119.6
Other operation and maintenance | 258.4 | 240.0 | 255.2
Depreciation and amortization | 172.2 | 140.9 | 140.1
Taxes other than income taxes | 41.8 | 42.1 | 43.6
Total operating expenses | 1,110.2 | 1,107.2 | 1,154.0
Operating income | 296.1 | 284.8 | 280.4
Interest expense and other: |  |  |
Interest expense | 85.0 | 80.2 | 79.9
Equity (income) loss from unconsolidated investments, net | (43.7) | (42.1) | (38.7)
Allowance for funds used during construction | (9.8) | (13.5) | (6.2)
Interest income and other | (0.1) | (0.1) | 0
Total interest expense and other | 31.4 | 24.5 | 35.0
Income from continuing operations before income taxes | 264.7 | 260.3 | 245.4
Income tax expense (benefit) | 87.2 | 94.6 | 81.9
Net income | 177.5 | 165.7 | 163.5
Preferred dividend requirements of subsidiaries | 1.6 | 3.3 | 3.3
Net income (loss) attributable to common shareowners | 175.9 | 162.4 | 160.2
Amounts attributable to common shareowners: |  |  |
Net income (loss) attributable to common shareowners | $ 175.9 | $ 162.4 | $ 160.2

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