PENSION AND POSTRETIREMENT BENEFITS (Narrative) (Details) (USD $)	12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Defined contribution plan, expected withdrawal costs	$ 200,000	$ 14,200,000
Pension and Postretirement Benefits (Textual) [Abstract]
Reduction in net expense related to benefit retirement plan			5,200,000
Expenses related to the defined contribution plans	40,200,000	30,700,000	24,200,000
Maximum
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Red zone multiemployer plans funded percentage	65.00%
Yellow zone multiemployer plans funded percentage	80.00%
Minimum
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Green zone multiemployer plan funded percentage	80.00%
Percentage of plan's total contribution under Forms 5500	5.00%
Level 3
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Fair value investments ability to impose customary redemption gates	635,400,000
Fair value investments impose customary redemption gates	2,200,000
Pension Benefits
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Accumulated benefit obligation	3,900,000,000	3,700,000,000
Anticipated contributions	12,900,000
Other Benefits
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Anticipated contributions	25,500,000
Private equity
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Unfunded commitment for additional investment	38,600,000
Private energy funds
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Unfunded commitment for additional investment	27,600,000
Real estate funds
Pension and Postretirement Benefits (Additional Textual) [Abstract]
Unfunded commitment for additional investment	$ 80,000,000