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Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net Income | $ 682 | $ 659 | $ 462
Retirement Benefits Liability |  |  |
Net loss arising during the period, net of tax | (7) | (4) | (5)
Prior service credit adjustment, net of tax | 0 | (1) | 4
Amortization of net actuarial loss | 3 | 4 | 2
Amortization of prior service credit, net of tax | (2) | (1) | (1)
Derivatives |  |  |
Unrealized loss on derivative instruments, net of tax of $(1), $-, and $- | (3) | (2) |
Unrealized loss on derivative instruments, net of tax of $(1), $-, and $- |  |  | 0
Reclassification adjustments included in net income, net of tax of $- for all periods | 1 | 0 |
Reclassification adjustments included in net income, net of tax of $- for all periods |  |  | 0
Other Comprehensive Loss | (8) | (4) | 0
Comprehensive Income | 674 | 655 | 462
Comprehensive Income Attributable to Noncontrolling Interests | 2 | 2 | 2
Comprehensive Income Attributable to CMS Energy | 672 | 653 | 460
Consumers Energy Company |  |  |
Net Income | 743 | 705 | 632
Retirement Benefits Liability |  |  |
Net loss arising during the period, net of tax | (8) | 6 | (4)
Amortization of net actuarial loss | 1 | 2 | 1
Investments |  |  |
Unrealized gain on investments | 0 | (1) | 3
Reclassification adjustments included in net income | 0 | 1 | (9)
Derivatives |  |  |
Other Comprehensive Loss | (7) | 8 | (9)
Comprehensive Income | $ 736 | $ 713 | $ 623

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