Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Apr. 30, 2025	Jan. 31, 2025
Cash equivalents:
Amortized Cost	$ 1,816	$ 1,599
Long-term
Total, amortized cost	1,559	1,424
Total, Gross unrealized gains	11	13
Total, Gross unrealized losses	(1)	(1)
Total, fair value	1,569	1,436
Corporate debt securities
Short-term
Amortized Cost	76	79
Fair Value	76	79
Long-term
Amortized Cost	92	96
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	0
Fair Value	93	97
U.S. government securities
Cash equivalents:
Fair Value	39
Short-term
Amortized Cost	66	74
Fair Value	66	74
Long-term
Amortized Cost	59	52
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	(1)
Fair Value	60	51
Commercial paper
Short-term
Amortized Cost	36	96
Fair Value	36	96
Asset-backed securities
Short-term
Amortized Cost	23	19
Fair Value	23	19
Long-term
Amortized Cost	66	71
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	66	71
Certificates of deposit
Short-term
Amortized Cost	10
Fair Value	10
Other
Short-term
Amortized Cost	13	19
Fair Value	13	19
Long-term
Amortized Cost	8	8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	8	8
Agency mortgage-backed securities
Long-term
Amortized Cost	34	40
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	34	40
Mutual funds
Long-term
Other investments	112	106
Other investments, gross unrealized gains	9	12
Other investments, gross unrealized losses	(1)	0
Other investments, fair value	120	118
Money market funds
Cash equivalents:
Amortized Cost	750	618
Fair Value	750	618
Commercial paper
Cash equivalents:
Amortized Cost	124	85
Fair Value	124	85
Certificates of deposit
Cash equivalents:
Amortized Cost	51	38
Fair Value	51	38
U.S. government securities
Cash equivalents:
Amortized Cost	39	19
Fair Value	$ 39	19
Other
Cash equivalents:
Amortized Cost		4
Fair Value		$ 4