Restructuring (Details) (USD $) In Millions	3 Months Ended
	Aug. 28, 2011 Corporate [Member] Selling, general and administrative expenses [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Corporate [Member] Selling, general and administrative expenses [Member] 2010 Plan [Member]	Aug. 28, 2011 Corporate [Member] Other, net [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Corporate [Member] Other, net [Member] 2010 Plan [Member]	Aug. 28, 2011 Corporate [Member] Severance and related costs [Member] Administrative Efficiency Restructuring Plan [Member]	Aug. 28, 2011 Corporate [Member] Accelerated depreciation [Member] Administrative Efficiency Restructuring Plan [Member]	Aug. 28, 2011 Corporate [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Corporate [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Selling, general and administrative expenses [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Consumer Foods [Member] Selling, general and administrative expenses [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Selling, general and administrative expenses [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Other, net [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Consumer Foods [Member] Other, net [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Other, net [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Severance and related costs [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Consumer Foods [Member] Severance and related costs [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Severance and related costs [Member] Network Optimization Plan [Member]	May 30, 2010 Consumer Foods [Member] Asset impairment charge [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Asset impairment charge [Member] Network Optimization Plan [Member]	May 30, 2010 Consumer Foods [Member] Cost of goods sold [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Cost of goods sold [Member] Network Optimization Plan [Member]	May 30, 2010 Consumer Foods [Member] Accelerated depreciation [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Accelerated depreciation [Member] Network Optimization Plan [Member]	May 30, 2010 Consumer Foods [Member] Inventory write-offs and related costs [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Inventory write-offs and related costs [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Consumer Foods [Member] 2010 Plan [Member]	Aug. 28, 2011 Consumer Foods [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Selling, general and administrative expenses [Member] Administrative Efficiency Restructuring Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Selling, general and administrative expenses [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Other, net [Member] Administrative Efficiency Restructuring Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Other, net [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Severance and related costs [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Asset impairment charge [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Cost of goods sold [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Inventory write-offs and related costs [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Administrative Efficiency Restructuring Plan [Member]	Aug. 28, 2011 Commercial Foods [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Selling, general and administrative expenses [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Selling, general and administrative expenses [Member] 2010 Plan [Member]	Aug. 28, 2011 Selling, general and administrative expenses [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Other, net [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Other, net [Member] 2010 Plan [Member]	Aug. 28, 2011 Other, net [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Severance and related costs [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Severance and related costs [Member] 2010 Plan [Member]	Aug. 28, 2011 Severance and related costs [Member] Network Optimization Plan [Member]	May 30, 2010 Asset impairment charge [Member] 2010 Plan [Member]	Aug. 28, 2011 Asset impairment charge [Member] Network Optimization Plan [Member]	May 30, 2010 Cost of goods sold [Member] 2010 Plan [Member]	Aug. 28, 2011 Cost of goods sold [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Accelerated depreciation [Member] Administrative Efficiency Restructuring Plan [Member]	May 30, 2010 Accelerated depreciation [Member] 2010 Plan [Member]	Aug. 28, 2011 Accelerated depreciation [Member] Network Optimization Plan [Member]	May 30, 2010 Inventory write-offs and related costs [Member] 2010 Plan [Member]	Aug. 28, 2011 Inventory write-offs and related costs [Member] Network Optimization Plan [Member]	Aug. 28, 2011 Administrative Efficiency Restructuring Plan [Member]	Aug. 29, 2010 2010 Plan [Member]	May 30, 2010 2010 Plan [Member]	Aug. 28, 2011 Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	$ 4.9	$ 3.6	$ 0.2	$ 3.6	$ 3.3	$ 1.4	$ 4.9	$ 3.6	$ 15.6	$ 43.4	$ 30.9	$ 10.3	$ 9.5	$ 12.3	$ 5.3	$ 17.0	$ 8.0	$ 16.9	$ 10.6	$ 19.8	$ 20.5	$ 19.1	$ 17.4	$ 0.7	$ 3.1	$ 15.6	$ 63.2	$ 51.4	$ 1.1	$ 16.6	$ 1.1	$ 2.7	$ 0.1	$ 13.8	$ 0.3	$ 0.3	$ 1.1	$ 16.9	$ 21.6	$ 47.0	$ 47.5	$ 11.6	$ 13.1	$ 15.0	$ 8.6	$ 17.0	$ 8.1	$ 16.9	$ 24.4	$ 19.8	$ 20.8	$ 1.4	$ 19.1	$ 17.4	$ 0.7	$ 3.4	$ 21.6	$ 66.8	$ 66.8	$ 68.3