Business And Basis Of Presentation - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) segment	Sep. 30, 2022 USD ($) Segment	Jul. 01, 2022 USD ($)	Apr. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 01, 2021 USD ($)	Jul. 02, 2021 USD ($)	Apr. 02, 2021 USD ($)	Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of business segments (in segments)	2	2
Long-term Debt	$ 1,430.9	$ 1,430.9			$ 1,315.8
Stockholders' equity	(3,957.9)	(3,957.9)			(4,058.0)
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	(3,689.6)	(3,689.6)	$ (3,678.4)	$ (3,667.9)	(3,732.6)	$ (3,716.6)	$ (3,707.6)	$ (3,691.1)	$ (3,684.4)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	$ (657.9)	$ (657.9)	$ (610.3)	$ (563.2)	(466.9)	$ (381.1)	$ (288.2)	$ (198.1)	$ (126.4)
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net deferred tax liability					18.6
Adjustment | Convertible Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term Debt					75.0
Adjustment | Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity					77.8
Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity					$ (21.4)