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Subsequent Event (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 28, 2025 | Mar. 28, 2025 | Dec. 27, 2024 | Mar. 28, 2025 | Mar. 29, 2024
Subsequent Event [Line Items] |  |  |  |  |
Accounts receivable, net |  |  | $ 152 |  | $ 163
E-commerce partner B |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Accounts receivable writeoff |  |  | 42 |  |
Billed contracts receivable |  |  | $ 139 |  |
E-commerce partner B | Forecast |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Accounts receivable writeoff |  | $ 24 |  | $ 66 |
Subsequent Event | Technology-enabled Personal Finance Education Platform |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Aggregate purchase price | $ 85 |  |  |  |

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