PENSION AND POSTRETIREMENT BENEFITS (Components) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012
Pension Benefits
Changes in benefit obligations and plan assets
Service cost	$ 89.0	$ 81.8	$ 68.7
Interest cost	151.1	150.1	149.2
Expected return on plan assets	(252.9)	(216.4)	(196.0)
Amortization of prior service cost (benefit)	3.8	3.6	3.0
Special termination benefits	0.4		0
Recognized Net Actuarial Loss	2.7	3.6	396.9
Curtailment loss	0	0.8	0
Benefit cost-Company plans	(5.9)	23.5	421.8
Pension benefit cost multiemployer plans	12.6	23.6	8.5
Total benefit cost	6.7	47.1	430.3
Other Benefits
Changes in benefit obligations and plan assets
Service cost	0.7	0.6	0.6
Interest cost	9.7	10.5	13.2
Expected return on plan assets			0
Amortization of prior service cost (benefit)	(7.2)	(8.2)	(13.6)
Recognized Net Actuarial Loss	6.7	5.9	7.6
Curtailment loss	0	0	0
Benefit cost-Company plans	9.9	8.8	7.8
Total benefit cost	$ 9.9	$ 8.8	$ 7.8