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Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | NRG Yield, Inc. | Common Stock | Additional Paid-In Capital | Additional Paid-In Capital NRG Yield, Inc. | Accumulated Deficit | Treasury Stock | Accumulated Other Comprehensive Loss | Noncontrolling Interest | Noncontrolling Interest NRG Yield, Inc.
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 1,968 |  | $ 4 | $ 8,376 |  | $ (6,268) | $ (2,386) | $ (72) | $ 2,314 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net income | 249 |  |  |  |  | 279 |  |  | (30) |
Other comprehensive loss | 11 |  |  |  |  |  |  | 11 |  |
Sale of assets to NRG Yield, Inc. |  | $ 12 |  |  | $ 8 |  |  |  |  | $ 4
ESPP share purchases | 3 |  |  | (2) |  |  | 5 |  |  |
Share repurchases | (93) |  |  |  |  |  | (93) |  |  |
Equity-based compensation | (10) |  |  | (10) |  |  |  |  |  |
Issuance of common stock | 7 |  |  | 7 |  |  |  |  |  |
Common stock dividends | (10) |  |  |  |  | (10) |  |  |  |
Distributions to noncontrolling interest and dividends paid | (19) | $ (30) |  |  |  |  |  |  | (19) | $ (30)
Contributions from noncontrolling interests | 153 |  |  |  |  |  |  |  | 153 |
Adoption of new accounting standards | 17 |  |  |  |  | 17 |  |  |  |
Balance at Mar. 31, 2018 | 2,258 |  | 4 | 8,379 |  | (5,982) | (2,474) | (61) | $ 2,392 |
Balance at Dec. 31, 2018 | (1,234) |  | 4 | 8,510 |  | (6,022) | (3,632) | (94) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net income | 482 |  |  |  |  | 482 |  |  |  |
Other comprehensive loss | (2) |  |  |  |  |  |  | (2) |  |
Share repurchases | (749) |  |  | (10) |  |  | (739) |  |  |
Equity-based compensation | (32) |  |  | (32) |  |  |  |  |  |
Issuance of common stock | 5 |  |  | 5 |  |  |  |  |  |
Common stock dividends | (8) |  |  |  |  | (8) |  |  |  |
Balance at Mar. 31, 2019 | $ (1,538) |  | $ 4 | $ 8,473 |  | $ (5,548) | $ (4,371) | $ (96) |  |

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