Business Segments - Narrative (Details) $ in Millions	3 Months Ended
Jan. 01, 2021 USD ($) segment nationalPark	Dec. 27, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	3
Possessory interest in National Park service sites \| nationalPark	1
Cost of services provided \| FSS United States
Segment Reporting Information [Line Items]
Proceeds from recovery of investment \| $	$ 10.0	$ 15.3
Sales \| Food Services \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	73.00%
Sales \| Facilities & Other \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	27.00%

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