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v3.25.2

Changes in Capital Structure - Changes in NRG's Common Stock Issued and Outstanding (Details) - shares |  |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jul. 30, 2025 | Jul. 08, 2025 | Jul. 31, 2025 | Jun. 30, 2025
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Preferred, Balance as of beginning of period (in shares) |  |  | 650,000 | 650,000
Preferred, Balance as of end of period (in shares) |  |  |  | 650,000
Common, Balance as of beginning of period (in shares) |  |  | 201,087,779 | 205,064,058
Treasury, Balance as of beginning of period (in shares) |  |  | (6,457,685) | (6,460,055)
Common, Outstanding, as of beginning of period (in shares) |  |  | 194,630,094 | 198,604,003
Shares repurchased (in shares) |  |  |  | (5,594,139)
Settlement of Capped Call Options (in shares) |  |  |  | (134)
Conversion of Convertible Senior Notes (in shares) |  |  |  | 134
Common, Balance as of end of period (in shares) |  |  |  | 201,087,779
Treasury, Balance as of end of period (in shares) |  |  |  | (6,457,685)
Common, Outstanding, as of end of period (in shares) |  |  |  | 194,630,094
Subsequent Event |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares repurchased (in shares) |  |  | (988,749) |
Settlement of Capped Call Options (in shares) |  |  | (4,210,920) |
Conversion of Convertible Senior Notes (in shares) |  |  | 3,986,335 |
Retirement of treasury stock (in shares) | (224,585) |  |  |
Common, Outstanding, as of end of period (in shares) |  |  | 193,430,802 |
Shares issued under LTIPs |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under LTIPs (in shares) |  |  |  | 1,538,327
Shares issued under LTIPs | Subsequent Event |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under LTIPs (in shares) |  |  | 14,042 |
Shares issued under ESPP |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under ESPP (in shares) |  |  |  | 81,903
Preferred Stock |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Preferred, Balance as of beginning of period (in shares) |  |  | 650,000 | 650,000
Preferred, Balance 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 |
Common Stock |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Common, Balance as of beginning of period (in shares) |  |  | 201,087,779 | 205,064,058
Settlement of Capped Call Options (in shares) |  |  |  | 0
Retirement of treasury stock (in shares) |  |  |  | (5,514,606)
Common, Balance as of end of period (in shares) |  |  |  | 201,087,779
Common Stock | Subsequent Event |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Retirement of treasury stock (in shares) |  |  | (1,091,281) |
Common, Balance as of end of period (in shares) |  |  | 200,010,540 |
Common Stock | Shares issued under LTIPs |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under LTIPs (in shares) |  |  |  | 1,538,327
Common Stock | Shares issued under LTIPs | Subsequent Event |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under LTIPs (in shares) |  |  | 14,042 |
Treasury Stock |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Treasury, Balance as of beginning of period (in shares) |  |  | (6,457,685) | (6,460,055)
Shares repurchased (in shares) |  |  |  | (5,594,139)
Settlement of Capped Call Options (in shares) |  |  |  | (134)
Conversion of Convertible Senior Notes (in shares) |  |  |  | 134
Retirement of treasury stock (in shares) |  |  |  | 5,514,606
Treasury, Balance as of end of period (in shares) |  |  |  | (6,457,685)
Treasury Stock | Subsequent Event |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares repurchased (in shares) |  |  | (988,749) |
Settlement of Capped Call Options (in shares) |  | (4,210,920) | (4,210,920) |
Conversion of Convertible Senior Notes (in shares) |  |  | 3,986,335 |
Retirement of treasury stock (in shares) |  |  | 1,091,281 |
Treasury, Balance as of end of period (in shares) |  |  | (6,579,738) |
Treasury Stock | Shares issued under ESPP |  |  |  |
Schedule of Stock by Class, Equity [Roll Forward] |  |  |  |
Shares issued under ESPP (in shares) |  |  |  | 81,903

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