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Changes in Capital Structure (Tables) | 9 Months Ended
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Sep. 30, 2019
Equity [Abstract] |
Changes in NRG's common shares issued and outstanding | As of September 30, 2019 and December 31, 2018, 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, 2018 | 420,288,886 |  |  | (136,638,847) |  |  | 283,650,039 |
Shares issued under LTIPs | 1,570,958 |  |  | — |  |  | 1,570,958 |
Shares repurchased | — |  |  | (33,235,480) |  |  | (33,235,480) |
Balance as of September 30, 2019 | 421,859,844 |  |  | (169,874,327) |  |  | 251,985,517 |
Shares issued under LTIPs subsequent to September 30, 2019 | 3,757 |  |  | — |  |  | 3,757 |
Shares issued under ESPP | — |  |  | 46,128 |  |  | 46,128 |
Shares repurchased subsequent to September 30, 2019 | — |  |  | (441,112) |  |  | (441,112) |
Balance as of October 31, 2019 | 421,863,601 |  |  | (170,269,311) |  |  | 251,594,290 |
Shares Repurchased | The following repurchases have been made during the nine months ended September 30, 2019 and through October 31, 2019 under the share repurchase programs:
| Total number of shares purchased |  | Average price paid per share |  | Amounts paid for shares purchased (in millions) |  |
Board Authorized Share Repurchases |  |  |  |  |  |  |
2018 program: |  |  |  |  |  |  |
Repurchases made during January-February to complete the 2018 program | 6,153,415 |  |  | $ | 40.61 |  |  | $ | 250 |  |  |
2019 programs: |  |  |  |  |  |  |
Repurchases under February 28, 2019 Accelerated Share Repurchase Agreement- $1.0 billion share repurchase program (a) | 9,438,671 |  |  |  |  | 400 |  |  |
Other repurchases under the $1.0 billion share repurchase program (a) | 16,615,479 |  |  |  |  | 600 |  |  |
Total $1.0 billion share repurchase program | 26,054,150 |  |  | 38.38 |  |  | 1,000 |  |  |
Repurchases made through September 30, 2019 under the $250 million share repurchase program (b) | 1,027,915 |  |  | 36.99 |  |  | 38 |  |  |
Total Share Repurchases during the nine months ended September 30, 2019 | 33,235,480 |  |  |  |  | $ | 1,288 |  |  |
Repurchases made subsequent to September 30, 2019 under the $250 million program(b) | 441,112 |  |  | 39.10 |  |  | $ | 17 |  |  |
Total Share Repurchases during the period ended October 31, 2019 | 33,676,592 |  |  |  |  | $ | 1,305 |  |  |
(a) The $1 billion share repurchase program was announced in February 2019 (b) The $250 million share repurchase program was announced in August 2019

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