Financial Instruments - Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jul. 31, 2023	Jan. 31, 2023
Cash equivalents
Amortized Cost	$ 1,714	$ 1,947
Long-term
Total, Amortized Cost	1,492	1,279
Total, Gross unrealized gains	12	7
Total, Gross unrealized losses	(1)	(5)
Total, Fair value	1,503	1,281
Commercial paper
Short-term
Amortized Cost	179	42
Marketable securities, short-term	179	42
Corporate debt securities
Short-term
Amortized Cost	63	44
Marketable securities, short-term	63	44
Long-term
Amortized Cost	104	45
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	104	45
U.S. government securities
Cash equivalents
Cash Equivalents, Fair Value	44
Short-term
Amortized Cost	61	17
Marketable securities, short-term	61	17
Long-term
Amortized Cost	29	35
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	29	35
Asset-backed securities
Short-term
Amortized Cost	29	19
Marketable securities, short-term	29	19
Long-term
Amortized Cost	47	13
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	47	13
Other
Short-term
Amortized Cost	27	3
Marketable securities, short-term	27	3
Long-term
Amortized Cost	13	9
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable securities, long-term	13	9
Agency mortgage backed securities
Long-term
Amortized Cost	26
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Marketable securities, long-term	26
Mutual funds
Long-term
Other investments	86	81
Other investments, gross unrealized gains	12	6
Other investments, gross unrealized losses	(1)	(1)
Other investments, fair value	97	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	499	737
Cash Equivalents, Fair Value	499	737
Commercial paper
Cash equivalents
Amortized Cost	194	169
Cash Equivalents, Fair Value	194	169
Certificates of deposit
Cash equivalents
Amortized Cost	75	35
Cash Equivalents, Fair Value	75	35
U.S. government securities
Cash equivalents
Amortized Cost	44	13
Cash Equivalents, Fair Value	44	13
Municipal bonds
Cash equivalents
Amortized Cost	11
Cash Equivalents, Fair Value	11
Other
Cash equivalents
Amortized Cost	5	12
Cash Equivalents, Fair Value	$ 5	$ 12