Acquisitions (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 27, 2012	May 29, 2011	May 30, 2010
Business Acquisition, Pro Forma Information [Abstract]
Pro forma net sales	$ 13,749.7	$ 12,979.1	$ 12,653.5
Pro forma net income	$ 497.7	$ 873.6	$ 667.3
Pro forma net income from continuing operations per share - basic	$ 1.21	$ 2.03	$ 1.50
Pro forma net income from continuing operations per share - diluted	$ 1.19	$ 2.01	$ 1.49