PENSION AND POSTRETIREMENT BENEFITS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012
Change in Plan Assets
Fair value of plan assets at beginning of year	$ 3,343.3
Investment and administrative expenses	(2,767.1)	(2,136.6)	(1,980.3)
Fair value of plan assets at end of year	3,546.0	3,343.3
Pension Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	3,817.5	3,328.3
Service cost	89.0	81.8	68.7
Interest cost	151.1	150.1	149.2
Amendments	2.2	6.8
Actuarial loss	79.5	114.3
Special termination benefits	0.4		0
Curtailments		(0.4)
Benefits paid	(159.5)	(147.8)
Currency	(1.2)	0
Business combination	0	284.4
Benefit obligation at ending of year	3,979.0	3,817.5	3,328.3
Change in Plan Assets
Fair value of plan assets at beginning of year	3,343.3	2,766.6
Actual return on plan assets	358.8	457.1
Employer contributions	18.3	19.8
Investment and administrative expenses	(13.8)	(16.5)
Benefits paid	(159.5)	(147.8)
Currency	(1.1)
Business combination	0	264.1
Fair value of plan assets at end of year	3,546.0	3,343.3	2,766.6
Other Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	302.8	282.7
Service cost	0.7	0.6	0.6
Interest cost	9.7	10.5	13.2
Plan participants' contributions	6.1	5.3
Amendments	(5.7)	0
Actuarial loss	(4.6)	(7.6)
Benefits paid	(25.1)	(27.2)
Currency	(0.4)	0
Business combination	0	38.5
Benefit obligation at ending of year	283.5	302.8	282.7
Change in Plan Assets
Fair value of plan assets at beginning of year	0.1	0.1
Actual return on plan assets	0.2
Employer contributions	19.0	21.9
Plan participants' contributions	6.1	5.3
Benefits paid	(25.1)	(27.2)
Fair value of plan assets at end of year	$ 0.3	$ 0.1	$ 0.1