SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Reclassifications from AOCI) (Details) - USD ($) $ in Millions		12 Months Ended
		May. 31, 2015	May. 25, 2014	May. 26, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense, net		$ (331.9)	$ (379.4)	$ (276.2)
Selling, general and administrative expenses		3,472.1	2,771.2	2,065.9
Total before tax		607.4	(173.7)	(698.4)
Income tax benefit		(234.0)	(220.1)	$ (361.9)
Reclassification out of Accumulated Other Comprehensive Income | Net derivative adjustment, net of tax:
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense, net	[1]	(0.5)	0.1
Selling, general and administrative expenses	[1],[2]	0.0	54.9
Total before tax	[1]	0.5	(55.0)
Income tax benefit	[1]	0.2	(20.6)
Net of tax	[1]	0.3	(34.4)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of pension and postretirement healthcare liabilities:
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net prior service benefit	[1]	(4.2)	(3.4)
Net actuarial loss	[1]	3.5	6.7
Curtailment	[1]	1.5	0.0
Total before tax	[1]	(0.8)	(3.3)
Income tax benefit	[1]	(0.3)	(1.2)
Net of tax	[1]	$ (0.5)	$ (2.1)

[1] Amounts in parentheses indicate income recognized in the Consolidated Statements of Operations.

[2] Prior year amount includes $41.8 million less deferred tax benefit of $15.6 million previously reported in accumulated other comprehensive loss.