Restructuring (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Nov. 27, 2011
Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	$ 20.0
2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	67.3
Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	74.8
Selling, general and administrative expenses [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	20.0
Selling, general and administrative expenses [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	47.5
Selling, general and administrative expenses [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	47.9
Other, net [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	10.7
Other, net [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	13.2
Other, net [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	13.5
Severance and related costs [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.9
Severance and related costs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	16.8
Severance and related costs [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.8
Asset impairment charge [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	17.5
Asset impairment charge [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	26.6
Cost of goods sold [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.8
Cost of goods sold [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	26.9
Accelerated depreciation [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.4
Accelerated depreciation [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.1
Accelerated depreciation [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.7
Inventory write-offs and related costs [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.7
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	7.2
Corporate [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	4.0
Corporate [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	3.6
Corporate [Member] | Selling, general and administrative expenses [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	4.0
Corporate [Member] | Selling, general and administrative expenses [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] | Severance and related costs [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	2.6
Corporate [Member] | Accelerated depreciation [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.4
Consumer Foods [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	14.8
Consumer Foods [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	63.7
Consumer Foods [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	58.9
Consumer Foods [Member] | Selling, general and administrative expenses [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	14.8
Consumer Foods [Member] | Selling, general and administrative expenses [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	43.9
Consumer Foods [Member] | Selling, general and administrative expenses [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	32.4
Consumer Foods [Member] | Other, net [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.5
Consumer Foods [Member] | Other, net [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.6
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	12.0
Consumer Foods [Member] | Severance and related costs [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	5.3
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	16.8
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	7.7
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	17.5
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	12.7
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	19.8
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	26.5
Consumer Foods [Member] | Accelerated depreciation [Member] | 2010 Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	19.1
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	19.7
Consumer Foods [Member] | Inventory write-offs and related costs [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	6.8
Commercial Foods [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.2
Commercial Foods [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	15.9
Commercial Foods [Member] | Selling, general and administrative expenses [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.2
Commercial Foods [Member] | Selling, general and administrative expenses [Member] | Network Optimization Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	15.5
Commercial Foods [Member] | Other, net [Member] | Administrative Efficiency Restructuring Plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.2
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	1.5
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	13.9
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	0.4
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	$ 0.4