Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

+ Details

Goodwill Changes in the Carrying Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		3 Months Ended		6 Months Ended		6 Months Ended		6 Months Ended		6 Months Ended						3 Months Ended	6 Months Ended
	Jul. 31, 2012 ReportingUnits	Jan. 31, 2012	Jul. 31, 2012 Platform Solutions and Emerging Business [Member]	Jan. 31, 2012 Platform Solutions and Emerging Business [Member]	Jul. 31, 2012 Architecture, Engineering and Construction [Member]	Jan. 31, 2012 Architecture, Engineering and Construction [Member]	Jul. 31, 2012 Manufacturing [Member]	Jan. 31, 2012 Manufacturing [Member]	Jul. 31, 2012 Media and Entertainment [Member]	Jan. 31, 2012 Media and Entertainment [Member]	Jul. 31, 2012 Vela Systems [Member]	Jul. 31, 2012 Vela Systems [Member] Platform Solutions and Emerging Business [Member]	Jul. 31, 2012 Vela Systems [Member] Architecture, Engineering and Construction [Member]	Jul. 31, 2012 Vela Systems [Member] Manufacturing [Member]	Jul. 31, 2012 Vela Systems [Member] Media and Entertainment [Member]	Jul. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member]	Jul. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] Platform Solutions and Emerging Business [Member]	Jul. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] Architecture, Engineering and Construction [Member]	Jul. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] Manufacturing [Member]	Jul. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] Media and Entertainment [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period											$ 57.6	$ 0	$ 57.6	$ 0	$ 0	$ 2.1	$ 2.1	$ 0	$ 0	$ 0
Goodwill before accumulated impairment losses beginning balance	831.6			76.6	247.7		323.3		184.0
Accumulated impairment losses beginning balance	(149.2)			0	0		0		(149.2)
Goodwill	739.2	682.4	77.7	76.6	304.0	247.7	322.7	323.3	34.8	34.8
Effect of foreign currency translation, purchase accounting and other	(2.9)		(1.0)		(1.3)		(0.6)		0
Goodwill before accumulated impairment losses ending balance	888.4		77.7	76.6	304.0		322.7		184.0
Accumulated impairment losses ending balance	$ (149.2)		$ 0	$ 0	$ 0		$ 0		$ (149.2)
Number of reporting units (presented as an integer)	4