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Capital Structure (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Changes in NRG's common shares issued and outstanding | The following table reflects the changes in NRG's preferred and common shares issued and outstanding for each period presented:
| Preferred Shares |  | Common Shares
| Issued and Outstanding |  | Issued |  | Treasury |  | Outstanding
Balance as of December 31, 2020 | — |  |  | 423,057,848 |  |  | (178,825,915) |  |  | 244,231,933 |
Shares issued under ESPP | — |  |  | — |  |  | 117,392 |  |  | 117,392 |
Shares issued under LTIPs | — |  |  | 489,326 |  |  | — |  |  | 489,326 |
Share repurchases | — |  |  | — |  |  | (1,084,752) |  |  | (1,084,752) |
Balance as of December 31, 2021 | — |  |  | 423,547,174 |  |  | (179,793,275) |  |  | 243,753,899 |
Shares issued under ESPP | — |  |  | — |  |  | 142,825 |  |  | 142,825 |
Shares issued under LTIPs | — |  |  | 349,827 |  |  | — |  |  | 349,827 |
Share repurchases | — |  |  | — |  |  | (14,685,521) |  |  | (14,685,521) |
Balance as of December 31, 2022 | — |  |  | 423,897,001 |  |  | (194,335,971) |  |  | 229,561,030 |
Issuance of Series A Preferred Stock | 650,000 |  |  | — |  |  | — |  |  | — |
Shares issued under ESPP | — |  |  | — |  |  | 191,249 |  |  | 191,249 |
Shares issued under LTIPs | — |  |  | 1,109,611 |  |  | — |  |  | 1,109,611 |
Share repurchases | — |  |  | — |  |  | (22,730,940) |  |  | (22,730,940) |
Retirement of treasury stock | — |  |  | (157,676,142) |  |  | 157,676,142 |  |  | — |
Balance as of December 31, 2023 | 650,000 |  |  | 267,330,470 |  |  | (59,199,520) |  |  | 208,130,950 |
Shares issued under LTIPs | — |  |  | 660,267 |  |  | — |  |  | 660,267 |
Share repurchases | — |  |  | — |  |  | (770,205) |  |  | (770,205) |
Retirement of treasury stock | — |  |  | (770,205) |  |  | 770,205 |  |  | — |
Balance as of February 1, 2024 | 650,000 |  |  | 267,220,532 |  |  | (59,199,520) |  |  | 208,021,012 |
Summary of shares repurchased | The following table summarizes the share repurchases made from 2021 through February 1, 2024:
| Total number of shares purchased | Average price paid per share | Amounts paid for shares purchased (in millions)
2021 Repurchases: |  |  |  |
Open market repurchases(a) | 1,084,752 |  | $ | 40.85 |  | $ | 44 |  |
2022 Repurchases: |  |  |  |
Open market repurchases | 14,685,521 |  | 40.48 |  | 595 |  |
2023 Repurchases: |  |  |  |
Open market repurchases | 5,054,798 |  |  | 200 |  |
Repurchases made under the accelerated share repurchase agreements(b) | 17,676,142 |  |  | 950 |  |
Total Share Repurchases during 2023 | 22,730,940 |  | (e) | $ | 1,150 |  | (c)
Repurchases made subsequent to December 31, 2023 under the accelerated share repurchase agreements(d) | 770,205 |  |  | — |  |
Total Share Repurchases January 1, 2023 through February 1, 2024 | 23,501,145 |  | (e) | $ | 1,150 |  |
(a)Includes $5 million accrued as of December 31, 2021 (b)Initial and interim shares delivered under the November 6, 2023 accelerated share repurchase agreements (c)Excludes $10 million accrued for excise tax owed as of December 31, 2023 (d)Additional shares delivered under the November 6, 2023 accelerated share repurchase agreements (e)The total number of shares delivered and the average price per share under the ASR agreements will be determined at the end of the ASR period

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