Financial Instruments - Schedule of Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jan. 31, 2025
Long-term
Derivative contract liabilities	$ (30.0)	$ (22.0)
Total	1,923.0	1,442.0
Derivative contract assets
Long-term
Derivative contract assets, fair value	33.0	28.0
Corporate debt securities
Short-term
Fair Value	53.0	79.0
Long-term
Fair Value	114.0	97.0
U.S. government securities
Cash equivalents:
Fair Value	50.0
Short-term
Fair Value	71.0	74.0
Long-term
Fair Value	60.0	51.0
Commercial paper
Short-term
Fair Value	55.0	96.0
Asset-backed securities
Short-term
Fair Value	20.0	19.0
Long-term
Fair Value	72.0	71.0
Certificates of deposit
Short-term
Fair Value	18.0
Agency bonds
Long-term
Fair Value		40.0
Other
Short-term
Fair Value	5.0	19.0
Long-term
Fair Value	7.0	8.0
Agency mortgage-backed securities
Short-term
Fair Value	11.0
Long-term
Fair Value	29.0	40.0
Mutual funds
Long-term
Long-term other assets, fair value	130.0	118.0
Money market funds
Cash equivalents:
Fair Value	1,095.0	618.0
Commercial paper
Cash equivalents:
Fair Value	85.0	85.0
Certificates of deposit
Cash equivalents:
Fair Value	44.0	38.0
U.S. government securities
Cash equivalents:
Fair Value	50.0	19.0
Other
Cash equivalents:
Fair Value	1.0	4.0
Level 1
Long-term
Derivative contract liabilities	0.0	0.0
Total	1,225.0	736.0
Level 1 | Derivative contract assets
Long-term
Derivative contract assets, fair value	0.0	0.0
Level 1 | Corporate debt securities
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 1 | U.S. government securities
Cash equivalents:
Fair Value	0.0
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 1 | Commercial paper
Short-term
Fair Value	0.0	0.0
Level 1 | Asset-backed securities
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 1 | Certificates of deposit
Short-term
Fair Value	0.0
Level 1 | Agency bonds
Long-term
Fair Value		0.0
Level 1 | Other
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 1 | Agency mortgage-backed securities
Short-term
Fair Value	0.0
Long-term
Fair Value	0.0
Level 1 | Mutual funds
Long-term
Long-term other assets, fair value	130.0	118.0
Level 1 | Money market funds
Cash equivalents:
Fair Value	1,095.0	618.0
Level 1 | Commercial paper
Cash equivalents:
Fair Value	0.0	0.0
Level 1 | Certificates of deposit
Cash equivalents:
Fair Value	0.0	0.0
Level 1 | U.S. government securities
Cash equivalents:
Fair Value		0.0
Level 1 | Other
Cash equivalents:
Fair Value	0.0	0.0
Level 2
Long-term
Derivative contract liabilities	(30.0)	(22.0)
Total	698.0	706.0
Level 2 | Derivative contract assets
Long-term
Derivative contract assets, fair value	33.0	28.0
Level 2 | Corporate debt securities
Short-term
Fair Value	53.0	79.0
Long-term
Fair Value	114.0	97.0
Level 2 | U.S. government securities
Cash equivalents:
Fair Value	50.0
Short-term
Fair Value	71.0	74.0
Long-term
Fair Value	60.0	51.0
Level 2 | Commercial paper
Short-term
Fair Value	55.0	96.0
Level 2 | Asset-backed securities
Short-term
Fair Value	20.0	19.0
Long-term
Fair Value	72.0	71.0
Level 2 | Certificates of deposit
Short-term
Fair Value	18.0
Level 2 | Agency bonds
Long-term
Fair Value		40.0
Level 2 | Other
Short-term
Fair Value	5.0	19.0
Long-term
Fair Value	7.0	8.0
Level 2 | Agency mortgage-backed securities
Short-term
Fair Value	11.0
Long-term
Fair Value	29.0
Level 2 | Mutual funds
Long-term
Long-term other assets, fair value	0.0	0.0
Level 2 | Money market funds
Cash equivalents:
Fair Value	0.0	0.0
Level 2 | Commercial paper
Cash equivalents:
Fair Value	85.0	85.0
Level 2 | Certificates of deposit
Cash equivalents:
Fair Value	44.0	38.0
Level 2 | U.S. government securities
Cash equivalents:
Fair Value		19.0
Level 2 | Other
Cash equivalents:
Fair Value	1.0	4.0
Level 3
Long-term
Derivative contract liabilities	0.0	0.0
Total	0.0	0.0
Level 3 | Derivative contract assets
Long-term
Derivative contract assets, fair value	0.0	0.0
Level 3 | Corporate debt securities
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 3 | U.S. government securities
Cash equivalents:
Fair Value	0.0
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 3 | Commercial paper
Short-term
Fair Value	0.0	0.0
Level 3 | Asset-backed securities
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 3 | Certificates of deposit
Short-term
Fair Value	0.0
Level 3 | Agency bonds
Long-term
Fair Value		0.0
Level 3 | Other
Short-term
Fair Value	0.0	0.0
Long-term
Fair Value	0.0	0.0
Level 3 | Agency mortgage-backed securities
Short-term
Fair Value	0.0
Long-term
Fair Value	0.0
Level 3 | Mutual funds
Long-term
Long-term other assets, fair value	0.0	0.0
Level 3 | Money market funds
Cash equivalents:
Fair Value	0.0	0.0
Level 3 | Commercial paper
Cash equivalents:
Fair Value	0.0	0.0
Level 3 | Certificates of deposit
Cash equivalents:
Fair Value	0.0	0.0
Level 3 | U.S. government securities
Cash equivalents:
Fair Value		0.0
Level 3 | Other
Cash equivalents:
Fair Value	$ 0.0	$ 0.0