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Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed by Major Class (Detail) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 0 Months Ended | 0 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jan. 31, 2014
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Jan. 31, 2013
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Jan. 31, 2012
|
Jun. 07, 2012
Vela Systems
|
Jun. 07, 2012
Vela Systems
Developed technologies
|
Jun. 07, 2012
Vela Systems
Customer relationships
|
Jun. 07, 2012
Vela Systems
Trade name
|
Jun. 07, 2012
Vela Systems
User List
|
Aug. 02, 2012
Socialcam
|
Aug. 02, 2012
Socialcam
Developed technologies
|
Aug. 02, 2012
Socialcam
Customer relationships
|
Aug. 02, 2012
Socialcam
Trade name
|
Aug. 02, 2012
Socialcam
User List
|
Oct. 04, 2012
Qontext
|
Oct. 04, 2012
Qontext
Developed technologies
|
Oct. 04, 2012
Qontext
Customer relationships
|
Oct. 04, 2012
Qontext
Trade name
|
Oct. 04, 2012
Qontext
User List
|
Dec. 21, 2012
PI-VR
|
Dec. 21, 2012
PI-VR
Developed technologies
|
Dec. 21, 2012
PI-VR
Customer relationships
|
Dec. 21, 2012
PI-VR
Trade name
|
Dec. 21, 2012
PI-VR
User List
|
Nov. 21, 2013
Graitec SA
|
Nov. 21, 2013
Graitec SA
Developed technologies
|
Nov. 21, 2013
Graitec SA
Customer relationships
|
Nov. 21, 2013
Graitec SA
Trade name
|
Nov. 21, 2013
Graitec SA
User List
|
Jan. 31, 2014
Other
|
Jan. 31, 2013
Other
|
Jan. 31, 2014
Other
Developed technologies
|
Jan. 31, 2013
Other
Developed technologies
|
Jan. 31, 2014
Other
Customer relationships
|
Jan. 31, 2013
Other
Customer relationships
|
Jan. 31, 2014
Other
Trade name
|
Jan. 31, 2013
Other
Trade name
|
Jan. 31, 2014
Other
User List
|
Jan. 31, 2013
Other
User List
|
|
| Business Acquisition [Line Items] | ||||||||||||||||||||||||||||||||||||||
| Intangible assets | $ 5.9 | $ 3.6 | $ 2.6 | $ 0 | $ 1.9 | $ 0 | $ 5.3 | $ 22.3 | $ 2.0 | $ 0 | $ 0 | $ 0 | $ 7.6 | $ 6.7 | $ 1.9 | $ 0 | $ 15.9 | $ 2.2 | $ 1.7 | $ 0 | $ 15.9 | $ 13.6 | $ 2.8 | $ 1.5 | $ 1.8 | $ 2.0 | $ 0 | $ 0 | ||||||||||
| Goodwill | 1,009.9 | 871.5 | 682.4 | 57.5 | 23.0 | 24.0 | 36.8 | 73.4 | 67.0 | 46.1 | ||||||||||||||||||||||||||||
| Deferred Revenue | (2.0) | 0 | 0 | (0.1) | 0 | 0 | 0 | |||||||||||||||||||||||||||||||
| Deferred tax asset (liability) | 3.9 | (9.4) | 0 | (5.0) | (6.2) | 0.7 | 0 | |||||||||||||||||||||||||||||||
| Net tangible assets (liabilities) | 4.5 | (0.2) | 0 | 0.7 | 0 | 1.5 | 0 | |||||||||||||||||||||||||||||||
| Payments to Acquire Businesses, Gross | 76.0 | 59.5 | 87.0 | 89.7 | 63.2 | |||||||||||||||||||||||||||||||||
| Business acquisition, total cash consideration | $ 76.0 | $ 42.9 | $ 26.0 | $ 48.6 | $ 87.0 | $ 89.7 | $ 63.2 | |||||||||||||||||||||||||||||||