Joint Ventures and VIE's (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018	Sep. 28, 2018
Consolidated Joint Venture \| VIE Primary beneficiary, aggregate disclosure
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
VIE consolidated assets	$ 135.7	$ 162.3	$ 135.7	$ 162.3
VIE consolidated liabilities	97.5	86.1	97.5	86.1
Unconsolidated Joint Venture \| VIE not primary beneficiary, aggregate disclosure
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
VIE unconsolidated assets	83.8		83.8		$ 85.2
VIE unconsolidated liabilities	86.1		86.1		75.9
Equity method investment exceeds carrying amount of share of net assets	74.7		74.7
Due from related party	13.9		13.9		$ 11.1
Unconsolidated Joint Venture \| VIE, primary beneficiary
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
VIE unconsolidated assets	160.6	148.4	160.6	148.4
Income from equity method joint ventures	$ 12.4	$ 19.6	$ 25.9	$ 27.2

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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-Publisher FASB
-Name Accounting Standards Codification
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The amount of net income (loss) reported by an equity method investment of the entity.

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Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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