CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Operating activities
Net income (loss)	$ 1,208.2	$ 214.5	$ (80.8)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization, and accretion	123.8	127.3	95.2
Stock-based compensation expense	398.4	362.4	249.5
Deferred income taxes	(778.6)	10.3	(6.8)
Restructuring and other exit costs, net	0.0	0.5	31.7
Other operating activities	38.8	(11.9)	2.2
Changes in operating assets and liabilities, net of business combinations:
Accounts receivable	12.6	(178.5)	(25.4)
Prepaid expenses and other assets	(56.4)	58.5	7.5
Accounts payable and other liabilities	129.6	(90.8)	(58.5)
Deferred revenue	344.4	916.7	197.0
Accrued income taxes	16.4	6.1	(34.5)
Net cash provided by operating activities	1,437.2	1,415.1	377.1
Investing activities
Purchases of marketable securities	(21.0)	(19.9)	(138.2)
Sales of marketable securities	0.0	22.4	319.6
Maturities of marketable securities	17.0	5.0	211.4
Purchases of developed technologies	(4.8)	0.0	0.0
Business combinations, net of cash acquired	(246.2)	0.0	(1,040.2)
Capital expenditures	(91.1)	(53.2)	(67.0)
Other investing activities	(57.8)	(11.6)	4.0
Net cash used in investing activities	(403.9)	(57.3)	(710.4)
Financing activities
Proceeds from issuance of common stock, net of issuance costs	114.1	93.7	90.9
Taxes paid related to net share settlement of equity awards	(156.7)	(112.5)	(143.4)
Repurchase and retirement of common stock	(551.7)	(442.5)	(293.5)
Proceeds from debt, net of discount	0.0	498.9	500.0
Repayments of debt	(450.0)	(500.0)	0.0
Other financing activities	(2.5)	(4.4)	(2.1)
Net cash (used in) provided by financing activities	(1,046.8)	(466.8)	151.9
Effect of exchange rate changes on cash and cash equivalents	11.0	(2.3)	(10.6)
Net (decrease) increase in cash and cash equivalents	(2.5)	888.7	(192.0)
Cash and cash equivalents at beginning of fiscal year	1,774.7	886.0	1,078.0
Cash and cash equivalents at end of fiscal year	1,772.2	1,774.7	886.0
Supplemental cash flow information:
Cash paid during the year for interest	62.7	67.8	59.0
Cash paid for income taxes, net of tax refunds	92.8	60.3	78.0
Non-cash investing and financing activities:
Fair value of common stock issued to settle liability-classified restricted stock units	28.7	23.5	0.0
Fair value of equity awards assumed	0.0	0.0	10.3
Fair value of common stock issued related to business combination	$ 37.9	$ 0.0	$ 44.8