Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Oct. 31, 2024	Jan. 31, 2024
Cash equivalents:
Amortized Cost	$ 1,437	$ 1,892
Long-term
Total, amortized cost	1,385	1,797
Total, Gross unrealized gains	13	13
Total, Gross unrealized losses	(2)	(1)
Total, fair value	1,396	1,809
Commercial paper
Short-term
Amortized Cost	162	159
Fair Value	162	159
Corporate debt securities
Short-term
Amortized Cost	78	75
Fair Value	78	75
Long-term
Amortized Cost	105	103
Gross Unrealized Gains		1
Gross Unrealized Losses	(1)	0
Fair Value	104	104
U.S. government securities
Cash equivalents:
Fair Value	77
Short-term
Amortized Cost		70
Fair Value		70
Long-term
Amortized Cost	44	24
Gross Unrealized Gains		0
Gross Unrealized Losses	(1)	0
Fair Value	43	24
Asset-backed securities
Short-term
Amortized Cost	18	28
Fair Value	18	28
Long-term
Amortized Cost	66	59
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	66	59
Other
Short-term
Amortized Cost	18	22
Fair Value	18	22
Long-term
Amortized Cost	5	11
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	5	11
Agency mortgage-backed securities
Long-term
Amortized Cost	46	36
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	46	36
Mutual funds
Long-term
Other investments	105	89
Other investments, gross unrealized gains	13	12
Other investments, gross unrealized losses	0	(1)
Other investments, fair value	118	100
Money market funds
Cash equivalents:
Amortized Cost	367	693
Fair Value	367	693
Commercial paper
Cash equivalents:
Amortized Cost	200	250
Fair Value	200	250
Certificates of deposit
Cash equivalents:
Amortized Cost	92	80
Fair Value	92	80
U.S. government securities
Cash equivalents:
Amortized Cost	77	92
Fair Value	77	92
Other
Cash equivalents:
Amortized Cost	2	6
Fair Value	$ 2	$ 6