Financial Instruments - Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Oct. 31, 2023	Jan. 31, 2023
Cash equivalents
Amortized Cost	$ 1,526	$ 1,947
Long-term
Total, amortized cost	1,623	1,279
Total, Gross unrealized gains	6	7
Total, Gross unrealized losses	(6)	(5)
Total, fair value	1,623	1,281
Commercial paper
Short-term
Amortized Cost	207	42
Marketable securities, short-term	207	42
U.S. government securities
Short-term
Amortized Cost	90	17
Marketable securities, short-term	90	17
Long-term
Amortized Cost	23	35
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	23	35
Corporate debt securities
Short-term
Amortized Cost	71	44
Marketable securities, short-term	71	44
Long-term
Amortized Cost	97	45
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Marketable securities, long-term	96	45
Asset-backed securities
Short-term
Amortized Cost	32	19
Marketable securities, short-term	32	19
Long-term
Amortized Cost	55	13
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Marketable securities, long-term	54	13
Agency discount notes
Short-term
Amortized Cost	11
Marketable securities, short-term	11
Other
Short-term
Amortized Cost	17	3
Marketable securities, short-term	17	3
Long-term
Amortized Cost	12	9
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	12	9
Agency mortgage backed securities
Long-term
Amortized Cost	35
Gross Unrealized Gains	0
Gross Unrealized Losses	(1)
Marketable securities, long-term	34
Mutual funds
Long-term
Other investments	87	81
Other investments, gross unrealized gains	6	6
Other investments, gross unrealized losses	(3)	(1)
Other investments, fair value	90	86
Convertible debt securities
Long-term
Other investments		3
Other investments, gross unrealized gains		1
Other investments, gross unrealized losses		(2)
Other investments, fair value		2
Strategic investments derivative asset
Long-term
Other investments		2
Other investments, gross unrealized gains		0
Other investments, gross unrealized losses		(2)
Other investments, fair value		0
Money market funds
Cash equivalents
Amortized Cost	546	737
Cash equivalents, fair value	546	737
Commercial paper
Cash equivalents
Amortized Cost	257	169
Cash equivalents, fair value	257	169
Certificates of deposit
Cash equivalents
Amortized Cost	69	35
Cash equivalents, fair value	69	35
Other
Cash equivalents
Amortized Cost	14	12
Cash equivalents, fair value	$ 14	12
U.S. government securities
Cash equivalents
Amortized Cost		13
Cash equivalents, fair value		$ 13