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Derivative Instruments - Effect of Cash Flow Hedges on Income Statement (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2024 | Oct. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Revenues | $ 2,160 | $ 1,866 | $ 6,235 | $ 5,337
Costs and expenses | 1,995 | 1,778 | 5,895 | 5,233
Revenues |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains (losses) related to cash flow hedges | 7 | 16 | 23 | 49
Costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains (losses) related to cash flow hedges | $ 3 | $ 1 | $ (2) | $ 2

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