Basis of Presentation Revenue Reclassification (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Net revenue:
Maintenance	$ 261.8	$ 277.5	$ 525.4	$ 561.9
Subscription	196.1	101.8	369.5	187.3
License and other	43.9	171.4	92.6	313.4
Net revenue	501.8	550.7	987.5	1,062.6
Cost of revenue:
Maintenance and subscription	52.8	46.8	107.7	93.4
License and other	17.8	27.6	36.4	62.5
Amortization of developed technology (1)	4.0	10.7	8.7	21.6
Total cost of revenue	$ 74.6	85.1	$ 152.8	177.5
Previously Reported
Net revenue:
Subscription		322.0		648.0
License and other		228.7		414.6
Net revenue		550.7		1,062.6
Cost of revenue:
Maintenance and subscription		38.2		78.0
License and other		46.9		99.5
Total cost of revenue		85.1		177.5
Change in Presentation Reclassification
Net revenue:
Maintenance		277.5		561.9
Subscription		(220.2)		(460.7)
License and other		(57.3)		(101.2)
Net revenue		0.0		0.0
Cost of revenue:
Maintenance and subscription		8.6		15.4
License and other		(19.3)		(37.0)
Amortization of developed technology (1)		10.7		21.6
Total cost of revenue		$ 0.0		$ 0.0

Cost of Goods Sold, Subscription and Maintenance

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The amount of expense recognized in the current period that reflects the allocation of the costs of intangible assets over the expected benefit period of such assets. This element applies only to intangible assets used in the production of goods.

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The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Revenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.

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Costs incurred and are directly related to generating license revenue. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark.

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Revenue derived from maintenance services provided under contracts or arrangements with clients. For example, it may include the maintenance of software, plant and equipment, and facilities.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Revenue from circulation or sale of subscriptions (for example, but not limited to, subscriptions to a magazine or newspaper).

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