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Stock Repurchase Activity (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2023 | Mar. 31, 2023 | Nov. 30, 2021
Equity [Abstract] |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 4,000,000,000
Repurchased shares under authorization (in shares) | 4,200,000 |  |  |  | 6,000,000 |  |
Repurchased shares under authorization, value | $ 342,300,000 | $ 141,200,000 | $ 247,200,000 | $ 195,200,000 | $ 483,500,000 |  |
Stock repurchase program, remaining authorized repurchase amount | $ 2,150,000,000 |  |  |  | $ 2,150,000,000 |  |
Common stock held in treasury (in shares) | 36,762,009 |  |  |  | 36,762,009 | 32,345,809 |

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