Stock-Based Compensation (Recognized Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2016	Feb. 22, 2015	Feb. 28, 2016		Feb. 22, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 11.9	$ 11.4	$ 29.2		$ 41.3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1.6	2.4	6.5	[1]	17.1	[1]
Restricted Stock/ Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	0.5	0.5	1.4	[1]	1.6	[1]
Darden Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	4.9	4.1	11.7		8.9
Cash-Settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	3.4	3.6	5.4		11.6
Equity-Settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	0.9	0.0	2.0		0.0
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	0.3	0.3	0.9		1.0
Director compensation program/other
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 0.3	$ 0.5	$ 1.3		$ 1.1

[1] Three Months Ended Nine Months Ended(in millions) February 28, 2016 February 22, 2015 February 28, 2016 February 22, 2015Stock options $1.6 $2.4 $6.5 $17.1Restricted stock/restricted stock units 0.5 0.5 1.4 1.6Darden stock units 4.9 4.1 11.7 8.9Cash-settled performance stock units 3.4 3.6 5.4 11.6Equity-settled performance stock units 0.9 — 2.0 —Employee stock purchase plan 0.3 0.3 0.9 1.0Director compensation program/other 0.3 0.5 1.3 1.1Total stock-based compensation expense $11.9 $11.4 $29.2 $41.3