PENSION AND POSTRETIREMENT BENEFITS (Components) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
Pension Benefits
Changes in benefit obligations and plan assets
Service cost	$ 81.8	$ 68.7	$ 59.7
Interest cost	150.1	149.2	147.5
Expected return on plan assets	(216.4)	(196.0)	(168.0)
Amortization of prior service cost (benefit)	3.6	3.0	3.2
Special termination benefits			1.3
Defined Benefit Plan, Amortization of Gains (Losses)	(3.6)	(396.9)	(10.3)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0.8	0	0
Benefit cost-Company plans	23.5	421.8	54.0
Pension benefit cost multiemployer plans	23.6	8.5	9.2
Total benefit cost	47.1	430.3	63.2
Other Benefits
Changes in benefit obligations and plan assets
Service cost	0.6	0.6	0.6
Interest cost	10.5	13.2	16.3
Expected return on plan assets			(0.1)
Amortization of prior service cost (benefit)	(8.2)	(13.6)	(9.6)
Defined Benefit Plan, Amortization of Gains (Losses)	(5.9)	(7.6)	(4.6)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	0	0
Benefit cost-Company plans	8.8	7.8	11.8
Total benefit cost	$ 8.8	$ 7.8	$ 11.8