SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Balances for Each Component of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 26, 2018	Aug. 27, 2017	May 27, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains on available-for-sale securities reclassified to retained earnings	$ 0.0	$ 0.2
Accumulated balances	3,815.0		$ 3,756.6
Currency translation losses, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(95.4)		(94.7)
Derivative adjustments, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(42.4)		1.0
Unrealized gains (losses) on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	0.0		0.6
Pension and post-employment benefit obligations, net of reclassification adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(17.9)		(17.4)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	(155.7)		(110.5)
Retained earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated balances	4,841.5		$ 4,744.9
Accounting Standards Update 2016-01 | Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains on available-for-sale securities reclassified to retained earnings	(0.6)
Accounting Standards Update 2016-01 | Retained earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains on available-for-sale securities reclassified to retained earnings	$ 0.6