Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Apr. 30, 2024	Jan. 31, 2024
Cash equivalents:
Amortized Cost	$ 1,681	$ 1,892
Long-term
Total, amortized cost	1,619	1,797
Total, Gross unrealized gains	13	13
Total, Gross unrealized losses	(4)	(1)
Total, fair value	1,628	1,809
Commercial paper
Short-term
Amortized Cost	141	159
Fair Value	141	159
Corporate debt securities
Cash equivalents:
Fair Value	10
Short-term
Amortized Cost	73	75
Fair Value	73	75
Long-term
Amortized Cost	108	103
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(1)	0
Fair Value	107	104
U.S. government securities
Cash equivalents:
Fair Value	12
Short-term
Amortized Cost	54	70
Fair Value	54	70
Long-term
Amortized Cost	25	24
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Fair Value	24	24
Asset-backed securities
Short-term
Amortized Cost	25	28
Fair Value	25	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	15	22
Fair Value	15	22
Long-term
Amortized Cost	7	11
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	7	11
Agency mortgage backed securities
Long-term
Amortized Cost	39	36
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Fair Value	38	36
Mutual funds
Long-term
Other investments	95	89
Other investments, gross unrealized gains	13	12
Other investments, gross unrealized losses	(1)	(1)
Other investments, fair value	107	100
Money market funds
Cash equivalents:
Amortized Cost	592	693
Fair Value	592	693
Commercial paper
Cash equivalents:
Amortized Cost	278	250
Fair Value	278	250
Certificates of deposit
Cash equivalents:
Amortized Cost	83	80
Fair Value	83	80
Other
Cash equivalents:
Amortized Cost		6
Fair Value		6
U.S. government securities
Cash equivalents:
Amortized Cost	12	92
Fair Value	12	$ 92
Corporate debt securities
Cash equivalents:
Amortized Cost	10
Fair Value	$ 10