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Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2017 | May 31, 2016 | May 31, 2015
Supplemental Cash Flow Information [Abstract] |  |  |
Income taxes paid | $ 462.6 | $ 369.9 | $ 372.8
Lease incentives received | $ 5.8 | $ 4.3 | $ 8.5

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- Definition The deferred credit for lease incentives received to be recognized as a reduction of rental expense over the lease term. + References No definition available. + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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Balance Type: | credit
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- References No definition available. + Details
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