Income Taxes (Schedule of earnings before income taxes and after-tax earnings from joint ventures and the corresponding income taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012
Earnings before income taxes and after-tax earnings from joint ventures:
United States	$ 2,181.4	$ 2,051.2	$ 1,816.5
Foreign	473.6	483.7	394.0
Earnings before income taxes and after-tax earnings from joint ventures	2,655.0	2,534.9	2,210.5
Income taxes currently payable:
Federal	526.7	493.4	399.1
State and local	37.8	39.5	52.0
Foreign	146.3	126.5	109.1
Total current	710.8	659.4	560.2
Income taxes deferred:
Federal	159.1	68.8	167.9
State and local	21.3	19.2	(1.3)
Foreign	(7.9)	(6.2)	(17.2)
Total deferred	172.5	81.8	149.4
Total income taxes	$ 883.3	$ 741.2	$ 709.6