PENSION AND POSTRETIREMENT BENEFITS (Weighted-average Asset Allocations) (Details)	12 Months Ended
	May 26, 2013	May 27, 2012
Weighted average asset allocation and target asset allocation
Total	100.00%	100.00%
Target Allocations	100.00%
Equity securities
Weighted average asset allocation and target asset allocation
Total	47.00%	41.00%
Target Allocations	38.00%
Debt securities
Weighted average asset allocation and target asset allocation
Total	23.00%	23.00%
Target Allocations	22.00%
Real estate funds
Weighted average asset allocation and target asset allocation
Total	3.00%	3.00%
Target Allocations	6.00%
Multi-strategy hedge funds
Weighted average asset allocation and target asset allocation
Total	13.00%	14.00%
Target Allocations	15.00%
Private equity
Weighted average asset allocation and target asset allocation
Total	2.00%	2.00%
Target Allocations	7.00%
Other
Weighted average asset allocation and target asset allocation
Total	12.00%	17.00%
Target Allocations	12.00%