CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Operating activities:
Net income	$ 271.2	$ 164.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	72.4	60.0
Stock-based compensation expense	266.0	194.1
Deferred income taxes	25.7	14.5
Other	7.9	36.0
Changes in operating assets and liabilities, net of business combinations:
Accounts receivable	292.6	162.7
Prepaid expenses and other assets	(157.5)	(52.0)
Accounts payable and other liabilities	(150.8)	(42.8)
Deferred revenue	(70.6)	(130.0)
Accrued income taxes	(18.8)	11.3
Net cash provided by operating activities	538.1	418.5
Investing activities:
Purchases of marketable securities	0.0	(17.0)
Sales and maturities of marketable securities	4.0	11.0
Capital expenditures	(36.1)	(46.7)
Purchases of developed technologies	(7.7)	(4.8)
Business combinations, net of cash acquired	(1,154.6)	0.0
Other investing activities	8.0	(54.3)
Net cash used in investing activities	(1,186.4)	(111.8)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	64.7	58.5
Taxes paid related to net share settlement of equity awards	(61.9)	(39.6)
Repurchases of common stock	(198.7)	(209.0)
Repayment of debt	0.0	(450.0)
Other financing activities	0.0	(2.5)
Net cash used in financing activities	(195.9)	(642.6)
Effect of exchange rate changes on cash and cash equivalents	(4.5)	1.0
Net decrease in cash and cash equivalents	(848.7)	(334.9)
Cash and cash equivalents at beginning of period	1,772.2	1,774.7
Cash and cash equivalents at end of period	923.5	1,439.8
Non-cash financing activities:
Fair value of common stock issued to settle liability-classified restricted stock units	0.0	28.7
Fair value of common stock issued related to business combination	$ 2.6	$ 0.0