Revenue Recognition - Narrative (Details) $ in Millions		12 Months Ended
	Oct. 01, 2019	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)	Oct. 01, 2018 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AcountingStandardsUpdate201601Member
Adoption of accounting standard		$ 1,027.8	$ 404.2
Number of operating segments | segment		2
Contract with customer, liability, revenue recognized		$ 216.9
Contract with customer, performance obligation satisfied in previous period		$ 0.0
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201409Member
Adoption of accounting standard | Accounting Standards Update 2014-09 | Retained earnings
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Adoption of accounting standard				$ 6.1