Derivative Instruments - Schedule of Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in accumulated other comprehensive income, net of tax, (effective portion)	$ 14	$ (6)	$ 24	$ (29)
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	(11)	14	(21)	17
Amount and location of (loss) gain recognized in net income
Operating income (expense)	1	0	4	0
Interest and other income (loss), net	4	7	10	(24)
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	0	1	0	1
Income Statement Location [Axis]: us-gaap:OperatingExpenses
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	(4)	8	(4)	3
Income Statement Location [Axis]: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	$ (7)	$ 5	$ (17)	$ 13