Equity and Cost Investments (Cost Method Investments) (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Oct. 01, 2017
Schedule of Cost and Equity Method Investments [Line Items]
Cost Method Investments	$ 38.7	$ 48.8
Company Store Investees [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Cost Method Investments	$ 23.0	$ 23.0

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

No definition available.

Name:	us-gaap_CostMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant