Investments - Schedule of Strategic Investments (Details) - USD ($) $ in Millions	Oct. 31, 2025	Jan. 31, 2025
Investment Holdings [Line Items]
Strategic investments	$ 6,410	$ 4,852
Equity securities
Investment Holdings [Line Items]
Strategic investments	6,366	4,811
Other investments
Investment Holdings [Line Items]
Strategic investments	44	41
Fair Value
Investment Holdings [Line Items]
Strategic investments	68	69
Fair Value | Equity securities
Investment Holdings [Line Items]
Strategic investments	68	69
Fair Value | Other investments
Investment Holdings [Line Items]
Strategic investments	0	0
Measurement Alternative
Investment Holdings [Line Items]
Strategic investments	6,120	4,617
Measurement Alternative | Equity securities
Investment Holdings [Line Items]
Strategic investments	6,120	4,617
Measurement Alternative | Other investments
Investment Holdings [Line Items]
Strategic investments	0	0
Other
Investment Holdings [Line Items]
Strategic investments	222	166
Other | Equity securities
Investment Holdings [Line Items]
Strategic investments	178	125
Other | Other investments
Investment Holdings [Line Items]
Strategic investments	$ 44	$ 41