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Stock Repurchase Activity (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Nov. 30, 2021 | Mar. 31, 2021
Equity [Abstract] |  |  |  |
Stock repurchase program, authorized amount |  |  | $ 4,000,000,000 |
Repurchased shares under authorization (in shares) | 2,000,000 | 2,000,000 |  |
Repurchased shares under authorization, value | $ 166,000,000 | $ 166,000,000 |  |
Stock repurchase program, remaining authorized repurchase amount | $ 3,830,000,000 | $ 3,830,000,000 |  |
Treasury stock (in shares) | 20,768,248 | 20,768,248 |  | 21,900,970

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