SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Balances for Each Component of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Millions	Nov. 26, 2017	May 28, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	$ 3,786.5	$ 4,077.8
Currency translation losses, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(78.7)	(98.6)
Derivative adjustments, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(0.4)	(1.1)
Unrealized gains (losses) on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	0.1	(0.3)
Pension and post-employment benefit obligations, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(86.2)	(112.9)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	$ (165.2)	$ (212.9)