Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jul. 31, 2026	Jan. 31, 2026
Other investments
Investments	$ 929	$ 2,261
Total, Gross unrealized gains	0	21
Total, Gross unrealized losses	(1)	0
Investments, Fair Value Disclosure	928	2,282
Rabbi Trust
Other investments
Deferred compensation liability, current	14	14
Deferred compensation liability, non-current	132	123
Deferred compensation liability	150	137
Mutual funds
Other investments
Other investments	146	117
Other investments, gross unrealized gains	0	20
Other investments, gross unrealized losses	0	0
Other investments, fair value	146	137
Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | Money market funds
Marketable securities:
Amortized Cost	280	1,107
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	280	1,107
Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | Certificates of deposit
Marketable securities:
Amortized Cost	83	54
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	83	54
Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | U.S. government securities
Marketable securities:
Amortized Cost	160	96
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	160	96
Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | Commercial paper
Marketable securities:
Amortized Cost		163
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		163
Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | Other
Marketable securities:
Amortized Cost		1
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		1
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | Certificates of deposit
Marketable securities:
Amortized Cost		16
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		16
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | U.S. government securities
Marketable securities:
Amortized Cost		67
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		67
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | Commercial paper
Marketable securities:
Amortized Cost	30	155
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	30	155
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | Corporate debt securities
Marketable securities:
Amortized Cost	11	66
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	11	66
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | Asset-backed securities
Marketable securities:
Amortized Cost	12	25
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	12	25
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesCurrent | Other
Marketable securities:
Amortized Cost	4	19
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	4	19
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesNoncurrent | U.S. government securities
Marketable securities:
Amortized Cost	81	83
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Fair Value	80	83
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesNoncurrent | Corporate debt securities
Marketable securities:
Amortized Cost	58	156
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	58	157
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesNoncurrent | Asset-backed securities
Marketable securities:
Amortized Cost	37	85
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	37	85
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesNoncurrent | Agency mortgage-backed securities
Marketable securities:
Amortized Cost	24	23
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	24	23
Balance Sheet Location [Axis]: us-gaap:MarketableSecuritiesNoncurrent | Other
Marketable securities:
Amortized Cost	3	28
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 3	$ 28