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v3.23.2

Changes in Capital Structure - Changes in NRG's Common Stock Issued and Outstanding (Details) - shares |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 09, 2023 | Jul. 31, 2023 | Jun. 30, 2023
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Common, Balance as of beginning of period (in shares) |  | 424,675,214 | 423,897,001
Treasury, Balance as of end of period (in shares) |  | (194,249,455) | (194,335,971)
Common, Outstanding, as of beginning of period (in shares) |  | 230,425,759 | 229,561,030
Preferred, Balance as of end of period (in shares) |  |  | 650,000
Common, Balance as of end of period (in shares) |  |  | 424,675,214
Treasury, Balance as of end of period (in shares) |  |  | (194,249,455)
Preferred, Outstanding as of end of period (in shares) |  |  | 650,000
Common, Outstanding, as of end of period (in shares) |  |  | 230,425,759
Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares repurchased (in shares) |  | (1,322,141) |
Common, Outstanding, as of end of period (in shares) |  | 229,117,430 |
Shares issued under LTIPs |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  |  | 778,213
Shares issued under LTIPs | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  | 13,812 |
Shares issued under ESPP |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under ESPP (in shares) |  |  | 86,516
Preferred Stock |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Preferred, Balance as of end of period (in shares) |  |  | 650,000
Preferred, Outstanding as of end of period (in shares) |  |  | 650,000
Preferred Stock | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Preferred, Balance as of end of period (in shares) |  | 650,000 |
Preferred, Outstanding as of end of period (in shares) |  | 650,000 |
Preferred Stock | Series A Preferred Stock |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Issuance of Series A Preferred Stock (in shares) | 650,000 |  | 650,000
Common Stock |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Common, Balance as of beginning of period (in shares) |  | 424,675,214 | 423,897,001
Common, Balance as of end of period (in shares) |  |  | 424,675,214
Common Stock | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares repurchased (in shares) |  | 0 |
Common, Balance as of end of period (in shares) |  | 424,689,026 |
Common Stock | Shares issued under LTIPs |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  |  | 778,213
Common Stock | Shares issued under LTIPs | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  | 13,812 |
Common Stock | Shares issued under ESPP |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under ESPP (in shares) |  |  | 0
Treasury Stock |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Treasury, Balance as of end of period (in shares) |  | (194,249,455) | (194,335,971)
Treasury, Balance as of end of period (in shares) |  |  | (194,249,455)
Treasury Stock | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares repurchased (in shares) |  | (1,322,141) |
Treasury, Balance as of end of period (in shares) |  | (195,571,596) |
Treasury Stock | Shares issued under LTIPs |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  |  | 0
Treasury Stock | Shares issued under LTIPs | Subsequent Event |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under LTIPs (in shares) |  | 0 |
Treasury Stock | Shares issued under ESPP |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |
Shares issued under ESPP (in shares) |  |  | 86,516

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