Restructuring (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	15 Months Ended
	Feb. 26, 2012	Feb. 26, 2012	Feb. 26, 2012
Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	$ 1.6	$ 15.0
Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	6.6	30.8	61.4
Selling, general and administrative expenses [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.6	15.0
Selling, general and administrative expenses [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.7	15.0	40.1
Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.2	6.1
Other, net [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.3	5.3	6.1
Severance and related costs [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	8.0
Severance and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.3	2.0	7.3
Asset impairment charge [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	7.7	26.7
Cost of goods sold [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	4.9	15.8	21.3
Accelerated depreciation [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.3	0.9
Accelerated depreciation [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.9	10.5	15.5
Inventory write-offs and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.0	5.3	5.8
Consumer foods [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.3	10.9
Consumer foods [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	6.4	25.7	45.4
Consumer foods [Member] | Selling, general and administrative expenses [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.3	10.9
Consumer foods [Member] | Selling, general and administrative expenses [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.6	10.0	24.5
Consumer foods [Member] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.9	5.2
Consumer foods [Member] | Other, net [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.3	3.9	4.6
Consumer foods [Member] | Severance and related costs [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.4	5.7
Consumer foods [Member] | Severance and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.3	2.0	7.2
Consumer foods [Member] | Asset impairment charge [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost		4.1	12.7
Consumer foods [Member] | Cost of goods sold [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	4.8	15.7	20.9
Consumer foods [Member] | Accelerated depreciation [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.9	10.5	15.5
Consumer foods [Member] | Inventory write-offs and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.9	5.2	5.4
Corporate [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	3.3
Corporate [Member] | Selling, general and administrative expenses [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	3.3
Corporate [Member] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost		0.1
Corporate [Member] | Severance and related costs [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	(0.3)	2.3
Corporate [Member] | Accelerated depreciation [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.3	0.9
Commercial foods [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.8
Commercial foods [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	5.1	16.0
Commercial foods [Member] | Selling, general and administrative expenses [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.8
Commercial foods [Member] | Selling, general and administrative expenses [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	5.0	15.6
Commercial foods [Member] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.8
Commercial foods [Member] | Other, net [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost		1.4	1.5
Commercial foods [Member] | Severance and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost			0.1
Commercial foods [Member] | Asset impairment charge [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	3.6	14.0
Commercial foods [Member] | Cost of goods sold [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.1	0.1	0.4
Commercial foods [Member] | Inventory write-offs and related costs [Member] | Network optimization plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	$ 0.1	$ 0.1	$ 0.4