RESTRUCTURING (Consolidated Amounts) (Details) (Ralcorp Restructuring, USD $) In Millions, unless otherwise specified	3 Months Ended	7 Months Ended
	Aug. 25, 2013	Aug. 25, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 7.3	$ 35.7
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7.0	35.4
Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0.3	0.3
Multi-employer Pension Cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		11.2
Multi-employer Pension Cost [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		11.2
Multi-employer Pension Cost [Member] | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		0
Other Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		0.3
Other Cost of Goods Sold [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		0
Other Cost of Goods Sold [Member] | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		0.3
Cost of Goods, Total [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		11.5
Cost of Goods, Total [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		11.2
Cost of Goods, Total [Member] | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		0.3
Severance and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7.0	24.2
Severance and Related Costs [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7.0	24.2
Severance and Related Costs [Member] | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0	0
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7.0	24.2
Selling, General and Administrative Expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7.0	24.2
Selling, General and Administrative Expenses | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0	0
Cost Of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0.3
Cost Of Goods Sold | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0
Cost Of Goods Sold | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 0.3