Financial Instruments - Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Millions	Apr. 30, 2022	Jan. 31, 2022	Jan. 31, 2021
Short-term
Derivative contract assets, fair value	$ 2.0
Total	954.0		$ 805.0
Foreign Exchange Contract
Short-term
Derivative contract assets, fair value	94.0		18.0
Derivative contract liabilities	(20.0)		(11.0)
Money market funds
Cash equivalents
Cash equivalents	531.0		302.0
Commercial paper
Cash equivalents
Cash equivalents	117.0		55.0
Commercial paper | Short-term
Short-term
Debt securities, fair value	6.0		103.0
U.S. government securities
Cash equivalents
Cash equivalents	20.0		25.0
U.S. government securities | Short-term
Short-term
Debt securities, fair value			13.0
Custody cash deposit
Cash equivalents
Cash equivalents			18.0
Agency discount notes
Cash equivalents
Cash equivalents	8.0
Asset backed securities | Short-term
Short-term
Debt securities, fair value	20.0		26.0
Corporate debt securities
Cash equivalents
Cash equivalents			18.0
Corporate debt securities | Short-term
Short-term
Debt securities, fair value	28.0		61.0
Corporate debt securities | Long-term
Short-term
Debt securities, fair value	39.0		44.0
Certificates of deposit
Cash equivalents
Cash equivalents			6.0
Certificates of deposit | Short-term
Short-term
Debt securities, fair value	10.0		14.0
Municipal bonds | Short-term
Short-term
Debt securities, fair value			11.0
Other
Cash equivalents
Cash equivalents	8.0		4.0
Other | Short-term
Short-term
Debt securities, fair value	3.0		4.0
Other | Long-term
Short-term
Debt securities, fair value			1.0
Common stock | Short-term
Short-term
Debt securities, fair value			4.0
Mutual funds
Short-term
Mutual funds	85.0	$ 89.0	89.0
Convertible debt securities
Short-term
Debt securities, fair value	3.0
Mutual funds	3.0
Level 1
Short-term
Derivative contract assets, fair value	0.0
Total	621.0		413.0
Level 1 | Foreign Exchange Contract
Short-term
Derivative contract assets, fair value	0.0		0.0
Derivative contract liabilities	0.0		0.0
Level 1 | Money market funds
Cash equivalents
Cash equivalents	531.0		302.0
Level 1 | Commercial paper
Cash equivalents
Cash equivalents	0.0		0.0
Level 1 | Commercial paper | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 1 | U.S. government securities
Cash equivalents
Cash equivalents	0.0		0.0
Level 1 | U.S. government securities | Short-term
Short-term
Debt securities, fair value			0.0
Level 1 | Custody cash deposit
Cash equivalents
Cash equivalents			18.0
Level 1 | Agency discount notes
Cash equivalents
Cash equivalents	0.0
Level 1 | Asset backed securities | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 1 | Corporate debt securities
Cash equivalents
Cash equivalents			0.0
Level 1 | Corporate debt securities | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 1 | Corporate debt securities | Long-term
Short-term
Debt securities, fair value	0.0		0.0
Level 1 | Certificates of deposit
Cash equivalents
Cash equivalents			0.0
Level 1 | Certificates of deposit | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 1 | Municipal bonds | Short-term
Short-term
Debt securities, fair value			0.0
Level 1 | Other
Cash equivalents
Cash equivalents	3.0		0.0
Level 1 | Other | Short-term
Short-term
Debt securities, fair value	2.0		0.0
Level 1 | Other | Long-term
Short-term
Debt securities, fair value			0.0
Level 1 | Common stock | Short-term
Short-term
Debt securities, fair value			4.0
Level 1 | Mutual funds
Short-term
Mutual funds	85.0		89.0
Level 1 | Convertible debt securities
Short-term
Mutual funds	0.0
Level 2
Short-term
Derivative contract assets, fair value	0.0
Total	328.0		392.0
Level 2 | Foreign Exchange Contract
Short-term
Derivative contract assets, fair value	94.0		18.0
Derivative contract liabilities	(20.0)		(11.0)
Level 2 | Money market funds
Cash equivalents
Cash equivalents	0.0		0.0
Level 2 | Commercial paper
Cash equivalents
Cash equivalents	117.0		55.0
Level 2 | Commercial paper | Short-term
Short-term
Debt securities, fair value	6.0		103.0
Level 2 | U.S. government securities
Cash equivalents
Cash equivalents	20.0		25.0
Level 2 | U.S. government securities | Short-term
Short-term
Debt securities, fair value			13.0
Level 2 | Custody cash deposit
Cash equivalents
Cash equivalents			0.0
Level 2 | Agency discount notes
Cash equivalents
Cash equivalents	8.0
Level 2 | Asset backed securities | Short-term
Short-term
Debt securities, fair value	20.0		26.0
Level 2 | Corporate debt securities
Cash equivalents
Cash equivalents			18.0
Level 2 | Corporate debt securities | Short-term
Short-term
Debt securities, fair value	28.0		61.0
Level 2 | Corporate debt securities | Long-term
Short-term
Debt securities, fair value	39.0		44.0
Level 2 | Certificates of deposit
Cash equivalents
Cash equivalents			6.0
Level 2 | Certificates of deposit | Short-term
Short-term
Debt securities, fair value	10.0		14.0
Level 2 | Municipal bonds | Short-term
Short-term
Debt securities, fair value			11.0
Level 2 | Other
Cash equivalents
Cash equivalents	5.0		4.0
Level 2 | Other | Short-term
Short-term
Debt securities, fair value	1.0		4.0
Level 2 | Other | Long-term
Short-term
Debt securities, fair value			1.0
Level 2 | Common stock | Short-term
Short-term
Debt securities, fair value			0.0
Level 2 | Mutual funds
Short-term
Mutual funds	0.0		0.0
Level 2 | Convertible debt securities
Short-term
Mutual funds	0.0
Level 3
Short-term
Derivative contract assets, fair value	2.0
Total	5.0		0.0
Level 3 | Foreign Exchange Contract
Short-term
Derivative contract assets, fair value	0.0		0.0
Derivative contract liabilities	0.0		0.0
Level 3 | Money market funds
Cash equivalents
Cash equivalents	0.0		0.0
Level 3 | Commercial paper
Cash equivalents
Cash equivalents	0.0		0.0
Level 3 | Commercial paper | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | U.S. government securities
Cash equivalents
Cash equivalents	0.0		0.0
Level 3 | U.S. government securities | Short-term
Short-term
Debt securities, fair value			0.0
Level 3 | Custody cash deposit
Cash equivalents
Cash equivalents			0.0
Level 3 | Agency discount notes
Cash equivalents
Cash equivalents	0.0
Level 3 | Asset backed securities | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | Corporate debt securities
Cash equivalents
Cash equivalents			0.0
Level 3 | Corporate debt securities | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | Corporate debt securities | Long-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | Certificates of deposit
Cash equivalents
Cash equivalents			0.0
Level 3 | Certificates of deposit | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | Municipal bonds | Short-term
Short-term
Debt securities, fair value			0.0
Level 3 | Other
Cash equivalents
Cash equivalents	0.0		0.0
Level 3 | Other | Short-term
Short-term
Debt securities, fair value	0.0		0.0
Level 3 | Other | Long-term
Short-term
Debt securities, fair value			0.0
Level 3 | Common stock | Short-term
Short-term
Debt securities, fair value			0.0
Level 3 | Mutual funds
Short-term
Mutual funds	0.0		$ 0.0
Level 3 | Convertible debt securities
Short-term
Mutual funds	$ 3.0