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Operating Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 28, 2016 | Feb. 27, 2016 | Nov. 28, 2015 | Aug. 29, 2015 | May 30, 2015 | Feb. 28, 2015 | Nov. 29, 2014 | Aug. 30, 2014 | May 31, 2014 | Mar. 01, 2014 | Nov. 30, 2013 | Aug. 31, 2013 | May 28, 2016 | May 30, 2015 | May 31, 2014
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expenses |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0 | $ 12.7 | $ 26.5
Net sales | $ 582.6 | $ 536.5 | $ 580.4 | $ 565.4 | $ 550.7 | $ 516.4 | $ 565.4 | $ 509.7 | $ 487.5 | $ 455.9 | $ 470.5 | $ 468.1 | $ 2,264.9 | $ 2,142.2 | $ 1,882.0
Distributor Concentration Risk | Sales Revenue, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |
Customer Concentration Risk | Sales Revenue, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% | 5.00% | 5.00%
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | $ 88.0 | $ 97.0 | $ 102.0
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 15.60% |  |

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