Segment Reporting (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Jan. 01, 2023
Segment Reporting Information [Line Items]
Segment Reporting, Factors Used to Identify Entity's Reportable Segments	Segment information is prepared on the same basis that our chief executive officer, who is our chief operating decision maker, manages the segments, evaluates financial results, and makes key operating decisions.
Income (Loss) from Equity Method Investments	$ 55.9	$ 57.8
Operating Segments [Member] | Channel Development [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Equity Method Investments	55.7	57.3
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Equity Method Investments	$ 0.0	$ 0.0