Acquisition of Cheddar's Scratch Kitchen (Allocation of Purchase Price) (Details) - USD ($) $ in Millions	Nov. 26, 2017	May 28, 2017	Apr. 24, 2017
Business Acquisition [Line Items]
Goodwill	$ 1,173.1	$ 1,201.7
Cheddar's Scratch Kitchen
Business Acquisition [Line Items]
Current assets			$ 47.9
Land, buildings and equipment			210.6
Trademark			375.0
Other assets			22.6
Goodwill			289.7
Total assets acquired			945.8
Current liabilities			47.1
Other liabilities			98.9
Total liabilities assumed			146.0
Net assets acquired			799.8
Preliminary | Cheddar's Scratch Kitchen
Business Acquisition [Line Items]
Current assets			48.2
Land, buildings and equipment			191.9
Trademark			375.0
Other assets			2.2
Goodwill			329.4
Total assets acquired			946.7
Current liabilities			43.4
Other liabilities			104.3
Total liabilities assumed			147.7
Net assets acquired			799.0
Adjustments | Cheddar's Scratch Kitchen
Business Acquisition [Line Items]
Current assets			(0.3)
Land, buildings and equipment			18.7
Trademark			0.0
Other assets			20.4
Goodwill			(39.7)
Total assets acquired			(0.9)
Current liabilities			3.7
Other liabilities			(5.4)
Total liabilities assumed			(1.7)
Net assets acquired			$ 0.8