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Earnings Per Share | 6 Months Ended
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Mar. 31, 2024
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share (in millions):
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2024 |  | 2023 |  | 2024 |  | 2023
Net income (loss) attributable to Johnson Controls | $ | (277) |  |  | $ | 133 |  |  | $ | 97 |  |  | $ | 251 |
Weighted Average Shares Outstanding |  |  |  |  |  |  |
Basic weighted average shares outstanding | 679.0 |  |  | 686.8 |  |  | 679.9 |  |  | 686.9 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options, unvested restricted stock and unvested performance share awards | — |  |  | 2.9 |  |  | 1.6 |  |  | 3.1 |
Diluted weighted average shares outstanding | 679.0 |  |  | 689.7 |  |  | 681.5 |  |  | 690.0 |
Antidilutive Securities |  |  |  |  |  |  |
Stock options and unvested restricted stock | — |  |  | 0.3 |  |  | 0.5 |  |  | 0.3 |
For the three months ended March 31, 2024, the total number of potential dilutive shares due to stock options, unvested restricted stock and unvested performance share awards was 1.6 million. However, these items were not included in the computation of diluted loss per share for the three months ended March 31, 2024 since to do so would decrease the loss per share.

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