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Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Net Income | $ 93 | $ 125 | $ 292 | $ 289
Retirement Benefits Liability |  |  |  |
Amortization of net actuarial loss | 1 | 1 | 1 | 1
Amortization of prior service credit, net of tax |  | (1) |  | (1)
Investments |  |  |  |
Unrealized gain (loss) on investments, net of tax |  |  | 1 |
Other Comprehensive Income | 1 |  | 2 |
Comprehensive Income | 94 | 125 | 294 | 289
Comprehensive Income Attributable to Noncontrolling Interest | 1 | 1 | 1 | 1
Comprehensive Income Attributable to CMS Energy | 93 | 124 | 293 | 288
Consumers Energy Company [Member] |  |  |  |
Net Income | 104 | 132 | 315 | 304
Retirement Benefits Liability |  |  |  |
Amortization of net actuarial loss | 1 |  | 1 |
Investments |  |  |  |
Unrealized gain (loss) on investments, net of tax |  | 2 | 2 | 5
Reclassification adjustments included in net income, net of tax |  |  | (8) |
Other Comprehensive Income | 1 | 2 | (5) | 5
Comprehensive Income Attributable to CMS Energy | $ 105 | $ 134 | $ 310 | $ 309

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