Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common shares	Additional paid-in surplus	Retained earnings	Accumulated other comprehensive (loss)	Parent	Noncontrolling Interest
Beginning balance at Dec. 31, 2018		$ 1.2	$ 1,089.1	$ 816.6	$ (202.4)
Changes in common shareholders' equity
Share-based compensation			1.2
Other, net			(0.1)
Net (loss) income	$ 104.1			104.1
Income attributable to non-controlling interests	(0.4)			(0.4)
Change in carrying value of Series B preference shares				(8.4)
Other, net				(0.1)
Change in foreign currency translation, net of tax	(27.8)				(27.8)
Ending balance at Mar. 31, 2019	1,775.2		1,090.2	911.8	(230.2)	$ 1,773.0	$ 2.2
Beginning balance at Dec. 31, 2019		$ 1.2	1,098.2	778.5	(237.5)
Changes in common shareholders' equity
Share-based compensation			1.9
Other, net			0.0
Net (loss) income	(121.3)			(121.3)
Income attributable to non-controlling interests	(0.2)			(0.2)
Change in carrying value of Series B preference shares				23.4
Other, net				0.1
Change in foreign currency translation, net of tax	(63.4)				(63.4)
Ending balance at Mar. 31, 2020	$ 1,476.7		$ 1,100.1	$ 673.7	$ (300.9)	$ 1,474.1	$ 2.6