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Changes in Capital Structure (Tables) | 6 Months Ended
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Jun. 30, 2020
Equity [Abstract] |
Changes in NRG's common shares issued and outstanding | As of June 30, 2020 and December 31, 2019, the Company had 500,000,000 shares of common stock authorized. The following table reflects the changes in NRG's common stock issued and outstanding:
| Issued |  | Treasury |  | Outstanding
Balance as of December 31, 2019 | 421,890,790 |  |  | (172,894,601) |  |  | 248,996,189 |
Shares issued under LTIPs | 1,140,987 |  |  | — |  |  | 1,140,987 |
Shares issued under ESPP | — |  |  | 63,455 |  |  | 63,455 |
Shares repurchased | — |  |  | (6,062,783) |  |  | (6,062,783) |
Balance as of June 30, 2020 | 423,031,777 |  |  | (178,893,929) |  |  | 244,137,848 |
Shares Repurchased | The following repurchases have been made during the six months ended June 30, 2020:
| Total number of shares purchased |  | Average price paid per share |  | Amounts paid for shares purchased (in millions) |  |
2020 repurchases: |  |  |  |  |  |  |
Repurchases | 6,062,783 |  |  |  |  | $ | 197 |  |  |
Equivalent shares purchased in lieu of tax withholdings on equity compensation issuances(a) | 710,474 |  |  |  |  | 27 |  |  |
Total Share Repurchases during the six months ended June 30, 2020 | 6,773,257 |  |  | $33.05 |  | $ | 224 |  |  |
(a) NRG elected to pay cash for tax withholding on equity awards instead of issuing actual shares to management. The average price per equivalent shares withheld was $38.24

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