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Goodwill and Intangible Assets, Net of Accumulated Amortization (Details Textual) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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May 31, 2012
Y
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May 31, 2011
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May 31, 2010
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| Acquired Finite-Lived Intangible Assets [Line Items] | |||
| Weighted-average amortization period of acquired intangible assets | 7.4 | ||
| Goodwill and Intangible Assets, Net of Accumulated Amortization (Textual) [Abstract] | |||
| Goodwill | $ 517.4 | $ 513.7 | |
| Amortization expense | $ 23.0 | $ 20.3 | $ 21.1 |
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Customer lists [Member]
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| Acquired Finite-Lived Intangible Assets [Line Items] | |||
| Weighted-average amortization period of acquired intangible assets | 7.6 | ||
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Other intangible assets [Member]
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| Acquired Finite-Lived Intangible Assets [Line Items] | |||
| Weighted-average amortization period of acquired intangible assets | 3.0 | ||
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- Definition
The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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
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