CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Net revenue:
Maintenance	$ 989.6	$ 1,103.1	$ 1,152.5
Subscription	894.3	443.1	228.1
Total maintenance and subscription revenue	1,883.9	1,546.2	1,380.6
License and other	172.7	484.8	1,123.5
Total net revenue	2,056.6	2,031.0	2,504.1
Cost of revenue:
Cost of maintenance and subscription revenue	214.4	191.7	162.3
Cost of license and other revenue	72.6	110.2	159.4
Amortization of developed technology	16.4	40.0	49.0
Total cost of revenue	303.4	341.9	370.7
Gross profit	1,753.2	1,689.1	2,133.4
Operating expenses:
Marketing and sales	1,087.3	1,022.5	1,015.5
Research and development	755.5	766.1	790.0
General and administrative	305.2	287.8	293.4
Amortization of purchased intangibles	20.2	31.8	33.2
Restructuring charges and other facility exit costs, net	94.1	80.5	0.0
Total operating expenses	2,262.3	2,188.7	2,132.1
(Loss) income from operations	(509.1)	(499.6)	1.3
Interest and other expense, net	(48.2)	(24.2)	(21.6)
Loss before income taxes	(557.3)	(523.8)	(20.3)
Provision for income taxes	(9.6)	(58.3)	(310.2)
Net loss	$ (566.9)	$ (582.1)	$ (330.5)
Basic net loss per share (usd per share)	$ (2.58)	$ (2.61)	$ (1.46)
Diluted net loss per share (usd per share)	$ (2.58)	$ (2.61)	$ (1.46)
Weighted average shares used in computing basic net loss per share (in shares)	219.5	222.7	226.0
Weighted average shares used in computing diluted net loss per share (in shares)	219.5	222.7	226.0