Restructuring Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	36 Months Ended
	May 27, 2012	May 31, 2012
Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	$ 18.4
Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	18.8
Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	83.2
2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	67.5	67.5
Accelerated depreciation [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.5
Accelerated depreciation [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.5
Accelerated depreciation [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	22.4
Accelerated depreciation [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		19.1
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	11.6
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
Cost of goods sold [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.5
Cost of goods sold [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	34.0
Cost of goods sold [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		19.8
Asset impairment charge [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	27.3
Asset impairment charge [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		17.5
Severance and related costs [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.9
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	8.8
Severance and related costs [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.8
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
Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.5
Other, net [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	12.1
Other, net [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		13.4
Selling, general and administrative expenses [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.9
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	18.8
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	49.2
Selling, general and administrative expenses [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		47.7
Consumer foods [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	18.4
Consumer foods [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	13.5
Consumer foods [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	67.2
Consumer foods [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		63.9
Consumer foods [Member] | Accelerated depreciation [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.5
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	22.4
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] | 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	11.2
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] | Cost of goods sold [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	8.5
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	33.6
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		19.8
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	13.3
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] | Severance and related costs [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.9
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	6.5
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	9.7
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] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	7.0
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	10.6
Consumer foods [Member] | Other, net [Member] | 2010 plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost		9.8
Consumer foods [Member] | Selling, general and administrative expenses [Member] | Acquisition-related restructuring [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	9.9
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	13.5
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	33.6
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		44.1
Commercial foods [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.3
Commercial foods [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	16.0
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
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] | Asset impairment charge [Member] | Network optimization plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	14.0
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] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.3
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] | 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	1.3
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	15.6
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] | Accelerated depreciation [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	1.5
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	2.3
Corporate [Member] | Other, net [Member] | Administrative efficiency restructuring plan [Member]
Summary of expected realization of restructuring pre tax expenses
Restructuring and related cost, expected cost	0.2
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] | 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