Restructuring and Reorganization Costs - Summary of Total Cumulative Restructuring and Reorganization Costs Incurred By Reporting Segment (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Organizational Realignment Items	$ 0.6	$ (0.3)	$ 0.7	$ 0.7	$ 8.5	$ 6.8