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SHARE-BASED COMPENSATION - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Share-based compensation |  |  |  |
Total share-based compensation expense | $ 39 | $ 27 | $ 125 | $ 80
2022 Nextracker Plan |  |  |  |
Share-based compensation |  |  |  |
Unrecognized compensation expense | $ 93 |  | $ 93 |
Share weighted-average remaining vesting period |  |  | 2 years 3 months 18 days |
Equity-based compensation awards granted (in shares) |  |  | 2,100,000 |
Equity-based compensation awards, outstanding (in shares) | 6,600,000 |  | 6,600,000 |
Equity-based compensation awards, targeted vesting amount (in shares) | 3,600,000 |  | 3,600,000 |
Total share-based compensation expense |  |  | $ 38 |
Restricted Stock Units | 2017 Plan |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 4,900,000 |
Number of shares outstanding (in shares) | 12,000,000 |  | 12,000,000 |
Unrecognized compensation expense | $ 170 |  | $ 170 |
Share weighted-average remaining vesting period |  |  | 2 years |
Restricted Stock Units | 2022 Nextracker Plan |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 1,200,000 |
RSU with No Performance Or Market Conditions | 2017 Plan |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 3,000,000 |
Average grant date price of unvested share bonus awards (in usd per share) | $ 26.82 |  | $ 26.82 |
RSU with No Performance Or Market Conditions | 2017 Plan | Maximum |  |  |  |
Share-based compensation |  |  |  |
Vesting period |  |  | 3 years |
RSU with Performance Conditions | 2017 Plan |  |  |  |
Share-based compensation |  |  |  |
Number of shares outstanding (in shares) | 1,200,000 |  | 1,200,000 |
RSU with Performance Conditions | 2017 Plan | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 400,000 |
Vesting period |  |  | 3 years |
Average grant date price of unvested share bonus awards (in usd per share) | $ 26.72 |  | $ 26.72 |
RSU with Performance Conditions | 2017 Plan | Minimum |  |  |  |
Share-based compensation |  |  |  |
Number of shares that may be issued (in shares) |  |  | 0 |
RSU with Performance Conditions | 2017 Plan | Minimum | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 0 |
RSU with Performance Conditions | 2017 Plan | Maximum |  |  |  |
Share-based compensation |  |  |  |
Number of shares that may be issued (in shares) |  |  | 2,400,000 |
RSU with Performance Conditions | 2017 Plan | Maximum | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 800,000 |
RSU with Performance Conditions | 2022 Nextracker Plan |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 400,000 |
RSU with Market Conditions | 2017 Plan |  |  |  |
Share-based compensation |  |  |  |
Number of shares outstanding (in shares) | 1,200,000 |  | 1,200,000 |
Vested in period (in shares) |  |  | 2,300,000 |
RSU with Market Conditions | 2017 Plan | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 400,000 |
Vesting period |  |  | 3 years |
Average grant date price of unvested share bonus awards (in usd per share) | $ 35.64 |  | $ 35.64 |
RSU with Market Conditions | 2017 Plan | Minimum |  |  |  |
Share-based compensation |  |  |  |
Number of shares that may be issued (in shares) |  |  | 0 |
RSU with Market Conditions | 2017 Plan | Minimum | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 0 |
RSU with Market Conditions | 2017 Plan | Maximum |  |  |  |
Share-based compensation |  |  |  |
Number of shares that may be issued (in shares) |  |  | 2,400,000 |
RSU with Market Conditions | 2017 Plan | Maximum | Key employees |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 800,000 |
Restricted Share Units, Issued And Immediately Vested | 2017 Plan |  |  |  |
Share-based compensation |  |  |  |
Awards granted (in shares) |  |  | 1,200,000 |
Option | 2022 Nextracker Plan |  |  |  |
Share-based compensation |  |  |  |
Options granted (in shares) |  |  | 500,000 |

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