Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jul. 31, 2024	Jan. 31, 2024
Cash equivalents:
Amortized Cost	$ 1,513	$ 1,892
Long-term
Total, amortized cost	1,495	1,797
Total, Gross unrealized gains	22	13
Total, Gross unrealized losses	(2)	(1)
Total, fair value	1,515	1,809
Commercial paper
Short-term
Amortized Cost	188	159
Fair Value	188	159
Corporate debt securities
Short-term
Amortized Cost	93	75
Fair Value	93	75
Long-term
Amortized Cost	93	103
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(1)	0
Fair Value	93	104
U.S. government securities
Cash equivalents:
Fair Value	18
Short-term
Amortized Cost	45	70
Fair Value	45	70
Long-term
Amortized Cost	24	24
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	24	24
Asset-backed securities
Short-term
Amortized Cost	26	28
Fair Value	26	28
Long-term
Amortized Cost	62	59
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	62	59
Other
Short-term
Amortized Cost	13	22
Fair Value	13	22
Long-term
Amortized Cost	10	11
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	10	11
Agency mortgage-backed securities
Long-term
Amortized Cost	42	36
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	42	36
Mutual funds
Long-term
Other investments	96	89
Other investments, gross unrealized gains	21	12
Other investments, gross unrealized losses	(1)	(1)
Other investments, fair value	116	100
Money market funds
Cash equivalents:
Amortized Cost	456	693
Fair Value	456	693
Commercial paper
Cash equivalents:
Amortized Cost	242	250
Fair Value	242	250
Certificates of deposit
Cash equivalents:
Amortized Cost	77	80
Fair Value	77	80
U.S. government securities
Cash equivalents:
Amortized Cost	18	92
Fair Value	18	92
Other
Cash equivalents:
Amortized Cost	10	6
Fair Value	$ 10	$ 6