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Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Operating Revenue | $ 1,406 | $ 1,333 | $ 3,385 | $ 3,076
Operating Expenses |  |  |  |
Fuel for electric generation | 147 | 126 | 301 | 256
Purchased and interchange power | 347 | 334 | 680 | 651
Purchased power - related parties | 23 | 20 | 46 | 42
Cost of gas sold | 166 | 133 | 773 | 683
Maintenance and other operating expenses | 304 | 282 | 586 | 577
Depreciation and amortization | 137 | 130 | 318 | 302
General taxes | 50 | 48 | 120 | 117
Total operating expenses | 1,174 | 1,073 | 2,824 | 2,628
Operating Income | 232 | 260 | 561 | 448
Other Income (Expense) |  |  |  |
Interest income | 2 | 1 | 2 | 2
Allowance for equity funds used during construction | 1 | 2 | 4 | 4
Income from equity method investees | 3 | 3 | 8 | 8
Other income | 2 | 3 | 5 | 6
Other expense | (3) | (3) | (6) | (5)
Total other income | 5 | 6 | 13 | 15
Interest Charges |  |  |  |
Interest on long-term debt | 99 | 94 | 193 | 188
Other interest expense | 4 | 5 | 9 | 11
Allowance for borrowed funds used during construction | (1) | (1) | (2) | (2)
Total interest charges | 102 | 98 | 200 | 197
Income Before Income Taxes | 135 | 168 | 374 | 266
Income Tax Expense | 54 | 67 | 149 | 105
Income From Continuing Operations | 81 | 101 | 225 | 161
Income From Discontinued Operations, Net |  |  |  | 7
Net Income | 81 | 101 | 225 | 168
Income Attributable to Noncontrolling Interests | 1 | 1 | 1 | 1
Net Income Attributable to Common Stockholders |  |  |  |
Amounts attributable to continuing operations | 80 | 100 | 224 | 160
Amounts attributable to discontinued operations |  |  |  | 7
Net Income Available to Common Stockholders | 80 | 100 | 224 | 167
Income Attributable to Noncontrolling Interests |  |  |  |
Amounts attributable to continuing operations | 1 | 1 | 1 | 1
Amounts attributable to discontinued operations |  |  |  |
Income attributable to noncontrolling interests | 1 | 1 | 1 | 1
Basic Earnings Per Average Common Share |  |  |  |
Basic earnings from continuing operations | $ 0.30 | $ 0.38 | $ 0.85 | $ 0.61
Basic earnings from discontinued operations |  |  |  | $ 0.03
Basic earnings attributable to common stock | $ 0.30 | $ 0.38 | $ 0.85 | $ 0.64
Diluted Earnings Per Average Common Share |  |  |  |
Diluted earnings from continuing operations | $ 0.29 | $ 0.37 | $ 0.83 | $ 0.59
Diluted earnings from discontinued operations |  |  |  | $ 0.03
Diluted earnings attributable to common stock | $ 0.29 | $ 0.37 | $ 0.83 | $ 0.62
Dividends Declared Per Common Share | $ 0.255 | $ 0.24 | $ 0.51 | $ 0.48
Consumers Energy Company [Member] |  |  |  |
Operating Revenue | 1,342 | 1,282 | 3,261 | 2,957
Operating Expenses |  |  |  |
Fuel for electric generation | 125 | 110 | 258 | 216
Purchased and interchange power | 340 | 327 | 669 | 640
Purchased power - related parties | 23 | 21 | 46 | 42
Cost of gas sold | 154 | 124 | 754 | 660
Maintenance and other operating expenses | 289 | 266 | 555 | 543
Depreciation and amortization | 136 | 128 | 316 | 299
General taxes | 48 | 46 | 117 | 114
Total operating expenses | 1,115 | 1,022 | 2,715 | 2,514
Operating Income | 227 | 260 | 546 | 443
Other Income (Expense) |  |  |  |
Interest income | 2 | 1 | 2 | 2
Allowance for equity funds used during construction | 1 | 2 | 4 | 4
Other income | 2 | 3 | 9 | 11
Other expense | (3) | (3) | (6) | (5)
Total other income | 2 | 3 | 9 | 12
Interest Charges |  |  |  |
Interest on long-term debt | 60 | 58 | 119 | 119
Other interest expense | 3 | 4 | 6 | 8
Allowance for borrowed funds used during construction | (1) | (1) | (2) | (2)
Total interest charges | 62 | 61 | 123 | 125
Income Before Income Taxes | 167 | 202 | 432 | 330
Income Tax Expense | 67 | 80 | 170 | 132
Net Income | 100 | 122 | 262 | 198
Preferred Stock Dividends and Distribution | 1 | 1 | 1 | 1
Net Income Attributable to Common Stockholders |  |  |  |
Net Income Available to Common Stockholders | $ 99 | $ 121 | $ 261 | $ 197

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