Shareholders' Equity - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Aug. 31, 2019	Aug. 03, 2018
Equity, Class of Treasury Stock [Line Items]
Net earnings, net of tax, attributable to noncontrolling interests	$ 20.5	$ 11.9
Shares authorized to be repurchased (in shares)			6,000,000.0	6,000,000.0
Shares repurchased during period (in shares)	900,000	1,200,000
Total cost of shares repurchased	$ 63.8	$ 101.0
August 2018 Authorization
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during period (in shares)	800,000
Shares remaining authorized for repurchase (in shares)	0
August 2019 Authorization
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during period (in shares)	100,000
Shares remaining authorized for repurchase (in shares)	5,900,000
Non-Controlling Interests
Equity, Class of Treasury Stock [Line Items]
Net earnings, net of tax, attributable to noncontrolling interests	$ 0.6	$ 1.0