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Derivative Instruments - Pre-tax Gains (Losses) Associated with Cash Flow Hedges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2024 | Oct. 31, 2023 | Jan. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (losses) recognized in OCI | $ 0 | $ 67 | $ 11 | $ 54 |
Revenues | 2,160 | 1,866 | 6,235 | 5,337 |
Costs and expenses | 1,995 | 1,778 | 5,895 | 5,233 |
Derivative assets: | 46 |  | 46 |  | $ 46
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 46 |  | 46 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (25) |  | (25) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 21 |  | 21 |  |
Counterparty A |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 13 |  | 13 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 13 |  | 13 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (4) |  | (4) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 9 |  | 9 |  |
Counterparty B |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 9 |  | 9 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 9 |  | 9 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (6) |  | (6) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 3 |  | 3 |  |
Counterparty C |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 3 |  | 3 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 3 |  | 3 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (1) |  | (1) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 2 |  | 2 |  |
Counterparty D |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 17 |  | 17 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 17 |  | 17 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (13) |  | (13) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 4 |  | 4 |  |
Counterparty E |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 1 |  | 1 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 1 |  | 1 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | 0 |  | 0 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 1 |  | 1 |  |
Counterparty F |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative assets: | 2 |  | 2 |  |
Gross Amounts Offset on the Condensed Consolidated Balance Sheets | 0 |  | 0 |  |
Foreign currency derivative assets | 2 |  | 2 |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Financial Instruments | (1) |  | (1) |  |
Gross Amounts Not Offset on the Condensed Consolidated Balance Sheets, Cash Collateral Received | 0 |  | 0 |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 1 |  | 1 |  |
Revenues |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (losses) reclassified from AOCI into income (effective portion) | 7 | 16 | 23 | 49 |
Costs and expenses |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (losses) reclassified from AOCI into income (effective portion) | 3 | 1 | (2) | 2 |
Other income (expense), net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (losses) related to non-designated hedges | $ 0 | $ 6 | $ (2) | $ 8 |

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