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Debt - Outstanding Debt (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jan. 31, 2025
Debt Instrument [Line Items]
Total principal amount	$ 3,000	$ 3,000
Less: unamortized debt discount and issuance costs	(15)	(16)
Debt, noncurrent	2,985	2,984
2027 Notes
Debt Instrument [Line Items]
Total principal amount	1,000	1,000
2029 Notes
Debt Instrument [Line Items]
Total principal amount	750	750
2032 Notes
Debt Instrument [Line Items]
Total principal amount	$ 1,250	$ 1,250

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