Supplemental Financial Statement Information - Severance and Employee Benefit Costs Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Reserve [Roll Forward]
Balance at December 31, 2022			$ 9.8
Restructuring charges (credits)	$ (0.5)	$ (2.6)	2.2	$ (5.0)
Payments			(1.1)
Balance at September 30, 2023	$ 10.9		$ 10.9