Fair Value Measurements (Narrative) (Details) $ in Millions	12 Months Ended
	May 31, 2020 USD ($) restaurant	Nov. 29, 2020 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Carrying value of long-term debt	$ 928.8	$ 929.4
Fair value of long-term debt	1,200.0	1,040.0
Long-lived assets	2,756.9	2,776.0
Goodwill	1,037.4	1,037.4
Trademarks	805.9	$ 806.3
Significant other observable inputs (Level 2)
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment	6.6
Significant other observable inputs (Level 2) | Carrying Value
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived assets	$ 24.2
Number of underperforming restaurants | restaurant	7
Significant other observable inputs (Level 2) | Fair Value
Impaired Long-Lived Assets Held and Used [Line Items]
Assets held-for-sale, long-lived, fair value	$ 17.6
Significant unobservable inputs (Level 3)
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment	34.9
Significant unobservable inputs (Level 3) | Carrying Value
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived assets	$ 35.1
Number of underperforming restaurants | restaurant	13
Number of restaurants damaged by natural disasters | restaurant	2
Significant unobservable inputs (Level 3) | Fair Value
Impaired Long-Lived Assets Held and Used [Line Items]
Assets held-for-sale, long-lived, fair value	$ 0.2
Cheddar's Scratch Kitchen | Significant unobservable inputs (Level 3)
Impaired Long-Lived Assets Held and Used [Line Items]
Asset impairment	314.2
Cheddar's Scratch Kitchen | Significant unobservable inputs (Level 3) | Carrying Value
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill	334.3
Trademarks	375.1
Cheddar's Scratch Kitchen | Significant unobservable inputs (Level 3) | Fair Value
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, fair value	165.1
Trademarks, fair value	$ 230.1