Investments - Schedule of Strategic Investments (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jan. 31, 2025
Investment Holdings [Line Items]
Strategic investments	$ 5,085	$ 4,852
Equity securities
Investment Holdings [Line Items]
Strategic investments	5,040	4,811
Other investments
Investment Holdings [Line Items]
Strategic investments	45	41
Fair Value
Investment Holdings [Line Items]
Strategic investments	84	69
Fair Value | Equity securities
Investment Holdings [Line Items]
Strategic investments	84	69
Fair Value | Other investments
Investment Holdings [Line Items]
Strategic investments	0	0
Measurement Alternative
Investment Holdings [Line Items]
Strategic investments	4,775	4,617
Measurement Alternative | Equity securities
Investment Holdings [Line Items]
Strategic investments	4,775	4,617
Measurement Alternative | Other investments
Investment Holdings [Line Items]
Strategic investments	0	0
Other
Investment Holdings [Line Items]
Strategic investments	226	166
Other | Equity securities
Investment Holdings [Line Items]
Strategic investments	181	125
Other | Other investments
Investment Holdings [Line Items]
Strategic investments	$ 45	$ 41