Supplemental Financial Statement Information - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($) employee	Jun. 30, 2020 USD ($) employee	Mar. 31, 2020 employee	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	$ (6.2)	$ 16.7		$ (6.2)	$ 24.7
Number of positions with decreased severance-related reserve | employee	200
Number of positions eliminated | employee		550	90
Restructuring reserve	$ 26.3			26.3		$ 43.4
Facility Idling
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	0.7			0.7
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	(6.9)			(6.9)
Other Current Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	18.2			18.2
Other Noncurrent Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 8.1			$ 8.1