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Acquisitions and Deconsolidation (Aggregate Purchase Price for Businesses Acquired) (Details) (USD $) In Thousands, unless otherwise specified | May 31, 2014 | May 31, 2013 | May 31, 2012
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Net goodwill recognized | $ 1,267,411 | $ 1,517,560 | $ 1,485,375
Series of business acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Fair value of tangible assets acquired | 11,415 | 7,212 |
Fair value of service contracts acquired | 6,343 | 34,858 |
Fair value of other intangibles acquired | 924 | 2,049 |
Net goodwill recognized | 13,865 | 32,133 |
Total fair value of assets acquired | 32,547 | 76,252 |
Fair value of liabilities (settled) assumed and incurred | (894) | 6,882 |
Total cash paid for acquisitions | $ 33,441 | $ 69,370 |

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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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