Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Unrecognized Tax Benefits [Roll Forward]
Beginning of period	$ 2,083	$ 1,975	$ 1,822
Tax positions taken in prior period, gross increases	53	53	53
Tax positions taken in prior period, gross decreases	(65)	(85)	(45)
Tax positions taken in current period, gross increases	378	287	227
Settlements	(4)	(21)	(40)
Lapse of statute of limitations	(25)	(104)	(12)
Currency translation effect	(1)	(22)	(30)
End of period	$ 2,419	$ 2,083	$ 1,975