Restructuring (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	9 Months Ended
	Nov. 27, 2011	Nov. 27, 2011	Nov. 27, 2011
Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	$ 2.1	$ 13.4
2010 Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost		67.3
Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	13.4	24.2	54.8
Selling, general and administrative expenses [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.1	13.4
Selling, general and administrative expenses [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	5.6	13.3	38.4
Other, net [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.3	4.9
Other, net [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.4	4.0	4.8
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)	7.9
Severance and related costs [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.1	1.7	7.0
Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.1	7.6	26.6
Cost of goods sold [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	7.8	10.9	16.4
Accelerated depreciation [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.6
Accelerated depreciation [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	4.9	7.6	12.6
Inventory write-offs and related costs [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.9	3.3	3.8
Consumer Foods [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.1	9.6
Consumer Foods [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	12.3	19.3	39.0
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	2.1	9.6
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	4.5	8.4	22.9
Consumer Foods [Member] | Other, net [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.1	4.3
Consumer Foods [Member] | Other, net [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.4	2.6	3.3
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		5.3
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	1.1	1.7	6.9
Consumer Foods [Member] | Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	2.0	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	7.8	10.9	16.1
Consumer Foods [Member] | Accelerated depreciation [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	4.9	7.6	12.6
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	2.9	3.3	3.5
Corporate [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	(0.2)	3.2
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	(0.2)	3.2
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	(0.4)	2.6
Corporate [Member] | Accelerated depreciation [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.6
Commercial Foods [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	0.2	0.6
Commercial Foods [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.1	4.9	15.8
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	0.6
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	1.1	4.9	15.5
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	0.6
Commercial Foods [Member] | Other, net [Member] | Network Optimization Plan [Member]
Summary of incurred restructuring pre tax expenses
Restructuring and Related Cost, Incurred Cost	1.0	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	3.5	13.9
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			0.3
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			$ 0.3