Stockholders' Equity - Schedule of Restricted Stock Activity (Details) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jul. 31, 2025 USD ($) $ / shares shares
Restricted stock
Outstanding (in millions)
Beginning balance (in shares)	26
Granted (in shares)	10
Canceled (in shares)	(2)
Vested and converted to shares (in shares)	(8)
Ending balance (in shares)	28
Expected to vest (in shares)	24
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 250.50
Granted (in dollars per share) | $ / shares	279.96
Canceled (in dollars per share) | $ / shares	251.03
Vested and converted to shares (in dollars per share) | $ / shares	248.36
Ending balance (in dollars per share) | $ / shares	$ 262.84
Aggregate Intrinsic Value (in millions)
Aggregate Intrinsic Value, Outstanding | $	$ 7,161
Aggregate Intrinsic Value, Expected to vest | $	$ 6,147
Performance shares
Outstanding (in millions)
Granted (in shares)	2
Weighted Average Grant Date Fair Value
Granted (in dollars per share) | $ / shares	$ 272.68