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Share Repurchases (Tables)
9 Months Ended
Feb. 26, 2017
Shares Repurchases [Abstract]  
Share repurchases [Table Text Block]
Quarter EndedNine-MonthPeriod Ended
In MillionsFeb. 26, 2017Feb. 28, 2016Feb. 26, 2017Feb. 28, 2016
Shares of common stock4.91.125.410.6
Aggregate purchase price$301.0$64.5$1,650.9$601.8