FAIR VALUE MEASUREMENTS - Financial assets and liabilities, recurring basis (Details) - USD ($) $ in Millions	Feb. 26, 2017	May 29, 2016
Assets:
Derivative assets		$ 2.1
Liabilities
Derivative liabilities	$ 2.5	0.2
Fixed rate debt
Liabilities
Long-term Debt	1,698.5
Long-term Debt, Fair Value	1,719.3
Variable rate debt
Liabilities
Long-term Debt	774.3
Recurring | Total
Assets:
Derivative assets		2.1
Deferred compensation assets	0.7	0.7
Total assets	0.7	2.8
Liabilities
Derivative liabilities	2.5	0.2
Deferred compensation liabilities	8.3	6.5
Total liabilities	10.8	6.7
Recurring | Level 1 | Total
Assets:
Derivative assets		1.5
Deferred compensation assets	0.7	0.7
Total assets	0.7	2.2
Recurring | Level 2 | Total
Assets:
Derivative assets		0.6
Total assets		0.6
Liabilities
Derivative liabilities	2.5	0.2
Deferred compensation liabilities	8.3	6.5
Total liabilities	$ 10.8	$ 6.7