Fair Value of Original Convertible Debt Investment

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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-Glossary Investing Activities

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Acquisitions - Additional Information (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended				12 Months Ended
	Jun. 27, 2014	May 29, 2014	Feb. 06, 2014	Nov. 21, 2013	Jan. 31, 2015 Entity	Jan. 31, 2014 Entity	Jan. 31, 2013
Business Acquisition [Line Items]
Goodwill					$ 1,456.2us-gaap_Goodwill	$ 1,009.9us-gaap_Goodwill	$ 871.5us-gaap_Goodwill
Shotgun Software Inc.
Business Acquisition [Line Items]
Consideration transferred	54.5
Payments to acquire business	51.2
Fair value of original convertible debt investment	3.3
Goodwill					43.2
Within Technologies Limited
Business Acquisition [Line Items]
Payments to acquire business		88.0
Goodwill		78.9			80.6
Delcam plc
Business Acquisition [Line Items]
Consideration transferred			284.6
Goodwill			166.0		190.4
Graitec SA
Business Acquisition [Line Items]
Payments to acquire business				87.0
Goodwill				64.1		73.4
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Payments to acquire business					234.5	89.7
Goodwill					$ 180.6	$ 67.0
Number of Businesses Acquired					21	14