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Earnings Per Share | 6 Months Ended
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Mar. 31, 2026
Earnings Per Share [Abstract] |
Earnings Per Share | Note 12—Earnings Per Share The following tables present earnings per share:
| Three Months Ended March 31, 2026
| Basic Earnings Per Share |  | Diluted Earnings Per Share
| Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2) |  | Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2)
| (in millions, except per share data)
Class A common stock | $ | 5,265 |  |  | 1,674 |  |  | $ | 3.15 |  |  | $ | 6,021 |  | (3) | 1,916 |  | (3) | $ | 3.14 |
Class B-1 common stock | 24 |  |  | 5 |  |  | $ | 4.87 |  |  | $ | 24 |  |  | 5 |  |  | $ | 4.87 |
Class B-2 common stock | 571 |  |  | 120 |  |  | $ | 4.75 |  |  | $ | 571 |  |  | 120 |  |  | $ | 4.74 |
Class C common stock | 112 |  |  | 9 |  |  | $ | 12.58 |  |  | $ | 112 |  |  | 9 |  |  | $ | 12.57 |
Participating securities | 49 |  |  | Not presented |  | Not presented |  | $ | 49 |  |  | Not presented |  | Not presented
Net income | $ | 6,021 |  |  |  |  |  |  |  |  |  |  |
| Six Months Ended March 31, 2026
| Basic Earnings Per Share |  | Diluted Earnings Per Share
| Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2) |  | Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2)
| (in millions, except per share data)
Class A common stock | $ | 10,382 |  |  | 1,681 |  |  | $ | 6.18 |  |  | $ | 11,874 |  | (3) | 1,924 |  | (3) | $ | 6.17 |
Class B-1 common stock | 46 |  |  | 5 |  |  | $ | 9.58 |  |  | $ | 46 |  |  | 5 |  |  | $ | 9.57 |
Class B-2 common stock | 1,126 |  |  | 120 |  |  | $ | 9.36 |  |  | $ | 1,125 |  |  | 120 |  |  | $ | 9.35 |
Class C common stock | 220 |  |  | 9 |  |  | $ | 24.71 |  |  | $ | 220 |  |  | 9 |  |  | $ | 24.68 |
Participating securities | 100 |  |  | Not presented |  | Not presented |  | $ | 100 |  |  | Not presented |  | Not presented
Net income | $ | 11,874 |  |  |  |  |  |  |  |  |  |  |
| Three Months Ended March 31, 2025
| Basic Earnings Per Share |  | Diluted Earnings Per Share
| Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2) |  | Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2)
| (in millions, except per share data)
Class A common stock | $ | 3,996 |  |  | 1,721 |  |  | $ | 2.32 |  |  | $ | 4,577 |  | (3) | 1,974 |  | (3) | $ | 2.32 |
Class B-1 common stock | 18 |  |  | 5 |  |  | $ | 3.63 |  |  | $ | 18 |  |  | 5 |  |  | $ | 3.63 |
Class B-2 common stock | 431 |  |  | 120 |  |  | $ | 3.58 |  |  | $ | 430 |  |  | 120 |  |  | $ | 3.58 |
Class C common stock | 85 |  |  | 9 |  |  | $ | 9.29 |  |  | $ | 85 |  |  | 9 |  |  | $ | 9.27 |
Participating securities | 47 |  |  | Not presented |  | Not presented |  | $ | 47 |  |  | Not presented |  | Not presented
Net income | $ | 4,577 |  |  |  |  |  |  |  |  |  |  |
| Six Months Ended March 31, 2025
| Basic Earnings Per Share |  | Diluted Earnings Per Share
| Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2) |  | Income Allocation (A)(1) |  | Weighted- Average Shares Outstanding (B) |  | Earnings per Share = (A)/(B)(2)
| (in millions, except per share data)
Class A common stock | $ | 8,463 |  |  | 1,725 |  |  | $ | 4.90 |  |  | $ | 9,696 |  | (3) | 1,979 |  | (3) | $ | 4.90 |
Class B-1 common stock | 37 |  |  | 5 |  |  | $ | 7.68 |  |  | $ | 37 |  |  | 5 |  |  | $ | 7.67 |
Class B-2 common stock | 911 |  |  | 120 |  |  | $ | 7.57 |  |  | $ | 909 |  |  | 120 |  |  | $ | 7.56 |
Class C common stock | 183 |  |  | 9 |  |  | $ | 19.62 |  |  | $ | 183 |  |  | 9 |  |  | $ | 19.59 |
Participating securities | 102 |  |  | Not presented |  | Not presented |  | $ | 102 |  |  | Not presented |  | Not presented
Net income | $ | 9,696 |  |  |  |  |  |  |  |  |  |  |
(1)Income allocation is based on the weighted-average number of as-converted class A common stock outstanding as shown in the table below. (2)Figures in the table may not recalculate exactly due to rounding. Basic and diluted earnings per share are calculated based on unrounded numbers. (3)Diluted class A common stock earnings per share calculation includes the assumed conversion of any class B-1, B-2 and C common stock and participating securities on an as-converted basis as shown in the table below and the incremental common stock equivalents related to employee stock plans, as calculated under the treasury stock method. For the three and six months ended March 31, 2026 and 2025, the common stock equivalents were not material for each period. The following table presents the weighted-average number of as-converted class A common stock outstanding:
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2026 |  | 2025 |  | 2026 |  | 2025
| (in millions)
Class B-1 common stock | 7 |  |  | 8 |  |  | 8 |  |  | 8 |
Class B-2 common stock | 182 |  |  | 186 |  |  | 182 |  |  | 186 |
Class C common stock | 36 |  |  | 37 |  |  | 36 |  |  | 37 |
Participating securities | 16 |  |  | 20 |  |  | 16 |  |  | 21 |

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