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PRE-TAX INCOME AND INCOME TAXES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Income Tax Disclosure [Abstract] |  |  |
United States | $ (444.5) | $ 276.9 | $ 962.6
Canada | 9.1 | 57.2 | 49.2
Foreign - other | 62.0 | 59.7 | 48.5
Total | $ (373.4) | $ 393.8 | $ 1,060.3

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