Financial Instruments - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Derivatives, Fair Value [Line Items]
Securities in continuous unrealized loss position for greater than twelve months	$ 0	$ 0
Allowance for credit loss	0	0
Securities, writeoff	0	0
Available-for-sale securities gross gains (losses)	0	600,000	$ 0
Proceeds from sale and maturity of marketable securities	37,800,000	17,000,000	27,400,000
Non-marketable equity securities investments without readily determinable fair value	133,700,000	134,100,000
Equity method investment, realized gain (loss) on disposal	8,100,000	0	0
Derivative, notional amount	1,080,000,000.00	1,140,000,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 24 months	24,200,000
Other financing activities	(7,300,000)	(2,500,000)	$ (4,400,000)
Aoci including portion attributable to noncontrolling interest, period increase (decrease)	900,000
Interest Rate Contract
Derivatives, Fair Value [Line Items]
Other financing activities	4,000,000
Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 542,200,000	$ 434,500,000