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Changes in Capital Structure (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Changes in NRG's common shares issued and outstanding | As of March 31, 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 | 1,089,103 |  |  | — |  |  | 1,089,103 |
Shares repurchased | — |  |  | (4,461,438) |  |  | (4,461,438) |
Balance as of March 31, 2020 | 422,979,893 |  |  | (177,356,039) |  |  | 245,623,854 |
Shares issued under LTIPs | 1,096 |  |  | — |  |  | 1,096 |
Shares issued under ESPP | — |  |  | 63,455 |  |  | 63,455 |
Shares repurchased | — |  |  | (1,601,345) |  |  | (1,601,345) |
Balance as of May 7, 2020 | 422,980,989 |  |  | (178,893,929) |  |  | 244,087,060 |
Shares Repurchased | The following repurchases have been made during the three months ended March 31, 2020 and through May 7, 2020:
| Total number of shares purchased |  | Average price paid per share |  | Amounts paid for shares purchased (in millions) |  |
2020 repurchases: |  |  |  |  |  |  |
Repurchases | 4,461,438 |  |  |  |  | $ | 150 |  |  |
Equivalent shares purchased in lieu of tax withholdings on equity compensation issuances(a) | 710,063 |  |  |  |  |  | 27 |  |  |
Total Share Repurchases during the three months ended March 31, 2020 | 5,171,501 |  |  | $34.20 |  | 177 |  |  |
Repurchases made subsequent to March 31, 2020 | 1,601,345 |  |  |  |  |  | $ | 47 |  |  |
Total Share Repurchases January 1, 2020 through May 7, 2020 | 6,772,846 |  |  | $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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