PENSION AND POSTRETIREMENT BENEFITS (Funded Status and Amounts Recognized in the Balance Sheet) (Details) - USD ($) $ in Millions	May. 31, 2015	May. 25, 2014
Projected benefit obligation, accumulated benefit obligation, and fair value of plan in excess of plan assets
Projected benefit obligation	$ 3,805.8	$ 3,390.9
Accumulated benefit obligation	3,658.3	3,289.3
Fair value of plan assets	3,232.1	2,942.5
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Funded Status	(553.2)	(433.0)
Amounts Recognized in Consolidated Balance Sheets
Other assets	20.5	18.8
Other accrued liabilities	(10.7)	(10.0)
Other noncurrent liabilities	(563.0)	(441.8)
Net Amount Recognized	(553.2)	(433.0)
Amounts Recognized in Accumulated Other Comprehensive (Income) Loss (Pre-tax)
Actuarial net loss	339.6	202.8
Net prior service cost (benefit)	14.2	18.7
Total	$ 353.8	$ 221.5
Weighted-Average Actuarial Assumptions Used to Determine Benefit Obligations at May 31, 2015 and May 25, 2014
Discount rate	4.10%	4.15%
Long-term rate of compensation increase	3.70%	4.25%
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Funded Status	$ (235.3)	$ (283.2)
Amounts Recognized in Consolidated Balance Sheets
Other assets	0.0	0.0
Other accrued liabilities	(23.3)	(25.0)
Other noncurrent liabilities	(212.0)	(258.2)
Net Amount Recognized	(235.3)	(283.2)
Amounts Recognized in Accumulated Other Comprehensive (Income) Loss (Pre-tax)
Actuarial net loss	16.1	55.3
Net prior service cost (benefit)	(25.0)	(29.6)
Total	$ (8.9)	$ 25.7
Weighted-Average Actuarial Assumptions Used to Determine Benefit Obligations at May 31, 2015 and May 25, 2014
Discount rate	3.50%	3.65%