Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Jan. 31, 2023
Derivatives, Fair Value [Line Items]
Total derivative assets	$ 15		$ 14
Total derivative liabilities	17		31
Amount of (loss) gain recognized in accumulated other comprehensive income, net of tax, (effective portion)	(13)	$ 55
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	22	2
Interest and other income (expense), net	2	24
Net revenue
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	20	6
Cost of revenue
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	0	(1)
Operating expenses
Derivatives, Fair Value [Line Items]
Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (effective portion)	2	$ (3)
Prepaid expenses and other current assets | Foreign Exchange Contract | Foreign currency contracts designated as cash flow hedges
Derivatives, Fair Value [Line Items]
Total derivative assets	9		9
Prepaid expenses and other current assets and long-term other assets | Foreign Exchange Contract | Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Total derivative assets	6		5
Other accrued liabilities | Foreign Exchange Contract | Foreign currency contracts designated as cash flow hedges
Derivatives, Fair Value [Line Items]
Total derivative liabilities	12		20
Other accrued liabilities | Foreign Exchange Contract | Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Total derivative liabilities	$ 5		$ 11