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Consolidated Statements of Common Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended | 12 Months Ended
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May. 31, 2015 | [1] | Feb. 22, 2015 | [1] | Nov. 23, 2014 | [1] | Aug. 24, 2014 | [1] | May. 25, 2014 | [1] | Feb. 23, 2014 | [1] | Nov. 24, 2013 | [1] | Aug. 25, 2013 | [1] | May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common stock (in dollars per share) | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 1.00 | $ 1.00 | $ 0.99
[1] | Basic and diluted earnings per share are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly earnings per share amounts may not agree with the total year.

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- References No definition available. + Details
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