Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
May 31, 2016 |
May 31, 2015 |
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| Income Tax Contingency [Line Items] | ||
| Reserve for uncertain tax positions | $ 54.2 | $ 29.1 |
| Impact of uncertain tax positions, if recognized, on effective income tax rate | $ 54.2 | $ 29.1 |
| Federal [Member] | IRS [Member] | Earliest Tax Year [Member] | ||
| Income Tax Contingency [Line Items] | ||
| Fiscal year currently under audit | 2012 | |
| Fiscal years subject to potential audit | 2015 | |
| Federal [Member] | IRS [Member] | Latest Tax Year [Member] | ||
| Income Tax Contingency [Line Items] | ||
| Fiscal year currently under audit | 2014 | |
| Fiscal years subject to potential audit | 2016 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Tax year being audited in the income tax examination, in CCYY format. No definition available.
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- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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