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Equity and Noncontrolling Interests - Schedule of Stockholders Equity (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | $ 2,546 | $ 2,375
Net income | 32 | 26
Foreign currency translation adjustments | 134 | 95
Realized and unrealized gains on derivatives | 9 | 25
Dividends attributable to noncontrolling interests | (4) | (4)
Repurchases of common stock | (100) |
Share based compensation and other | (1) | (8)
Stockholders' equity, ending balance | 2,616 | 2,509
Shareholders' Equity Attributable to Adient |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | 2,228 | 2,073
Net income | 20 | 12
Foreign currency translation adjustments | 129 | 90
Realized and unrealized gains on derivatives | 9 | 25
Repurchases of common stock | (100) |
Share based compensation and other | (1) | (8)
Stockholders' equity, ending balance | 2,285 | 2,192
Ordinary Shares |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | 0 | 0
Stockholders' equity, ending balance | 0 | 0
Additional Paid-in Capital |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | 3,973 | 4,026
Repurchases of common stock | (100) |
Share based compensation and other | (1) | (8)
Stockholders' equity, ending balance | 3,872 | 4,018
Retained Earnings (Accumulated Deficit) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | (903) | (1,108)
Net income | 20 | 12
Stockholders' equity, ending balance | (883) | (1,096)
Accumulated Other Comprehensive Income (Loss) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | (842) | (845)
Foreign currency translation adjustments | 129 | 90
Realized and unrealized gains on derivatives | 9 | 25
Stockholders' equity, ending balance | (704) | (730)
Shareholders' Equity Attributable to Noncontrolling Interests |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Stockholders' equity, beginning balance | 318 | 302
Net income | 12 | 14
Foreign currency translation adjustments | 5 | 5
Dividends attributable to noncontrolling interests | (4) | (4)
Share based compensation and other | 0 | 0
Stockholders' equity, ending balance | $ 331 | $ 317

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