Financial Instruments - Schedule of Financial Instruments by Significant Investment Category (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025
Cash equivalents
Amortized Cost	$ 2,249	$ 1,599
Long-term
Total, amortized cost	2,261	1,424
Total, Gross unrealized gains	21	13
Total, Gross unrealized losses	0	(1)
Total, fair value	2,282	1,436
Rabbi Trust
Long-term
Deferred compensation liability, current	14	12
Deferred compensation liability, non-current	123	106
Commercial paper
Short-term
Amortized Cost	155	96
Fair Value	155	96
Corporate debt securities
Short-term
Amortized Cost	66	79
Fair Value	66	79
Long-term
Amortized Cost	156	96
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	0
Fair Value	157	97
U.S. government securities
Short-term
Amortized Cost	67	74
Fair Value	67	74
Long-term
Amortized Cost	83	52
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(1)
Fair Value	83	51
Asset backed securities
Short-term
Amortized Cost	25	19
Fair Value	25	19
Long-term
Amortized Cost	85	71
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	85	71
Certificates of deposit
Short-term
Amortized Cost	16
Fair Value	16
Other
Short-term
Amortized Cost	19	19
Fair Value	19	19
Long-term
Amortized Cost	28	8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	28	8
Agency mortgage-backed securities
Long-term
Amortized Cost	23	40
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	23	40
Mutual funds
Long-term
Other investments	117	106
Other investments, gross unrealized gains	20	12
Other investments, gross unrealized losses	0	0
Other investments, fair value	137	118
Money market funds
Cash equivalents
Amortized Cost	1,107	618
Fair Value	1,107	618
Commercial paper
Cash equivalents
Amortized Cost	163	85
Fair Value	163	85
Certificates of deposit
Cash equivalents
Amortized Cost	54	38
Fair Value	54	38
U.S. government securities
Cash equivalents
Amortized Cost	96	19
Fair Value	96	19
Other
Cash equivalents
Amortized Cost	1	4
Fair Value	$ 1	$ 4