Derivative Instruments - Schedule of Pre-tax Gains (Losses) Associated with Cash Flow Hedges (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) recognized in OCI | $ 37 | $ (2) | $ 58 | $ (164) |
| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) reclassified from AOCI into income (effective portion) | (2) | 6 | 0 | 0 |
| Location, Statement of Income, Balance [Axis]: us-gaap:NonoperatingIncomeExpense | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Losses related to non-designated hedges | (10) | (12) | (14) | (12) |
| Location, Statement of Income, Balance [Axis]: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) reclassified from AOCI into income (effective portion) | $ (12) | $ 8 | $ (21) | $ 16 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|