Restructuring Activities (Details) (USD $) In Millions	12 Months Ended
	May 29, 2011
Corporate [Member] | Selling, general and administrative expense [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	$ 3.6
Corporate [Member] | Other, net [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.6
Corporate [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.6
Consumer Foods [Member] | Selling, general and administrative expense [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	44.7
Consumer Foods [Member] | Selling, general and administrative expense [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	25.4
Consumer Foods [Member] | Other, net [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	11.2
Consumer Foods [Member] | Other, net [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.2
Consumer Foods [Member] | Severance and related costs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	17.0
Consumer Foods [Member] | Severance and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.6
Consumer Foods [Member] | Asset impairment charge [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	16.5
Consumer Foods [Member] | Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.6
Consumer Foods [Member] | Cost of goods sold [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.7
Consumer Foods [Member] | Cost of goods sold [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	15.7
Consumer Foods [Member] | Accelerated depreciation [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.0
Consumer Foods [Member] | Accelerated depreciation [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	12.5
Consumer Foods [Member] | Inventory write-offs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.7
Consumer Foods [Member] | Inventory write-offs and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.2
Consumer Foods [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	64.4
Consumer Foods [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	41.1
Commercial Foods [Member] | Selling, general and administrative expense [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	13.5
Commercial Foods [Member] | Other, net [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.0
Commercial Foods [Member] | Severance and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.1
Commercial Foods [Member] | Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	10.4
Commercial Foods [Member] | Cost of goods sold [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.3
Commercial Foods [Member] | Inventory write-offs and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.3
Commercial Foods [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	13.8
Selling, general and administrative expense [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	48.3
Selling, general and administrative expense [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	38.9
Other, net [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	14.8
Other, net [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	12.2
Severance and related costs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	17.0
Severance and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.7
Asset impairment charge [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	16.5
Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.0
Cost of goods sold [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.7
Cost of goods sold [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	16.0
Accelerated depreciation [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.0
Accelerated depreciation [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	12.5
Inventory write-offs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.0
Inventory write-offs and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.5
2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	68.0
Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	$ 54.9