Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Comprehensive (loss) income
Net (loss) income	$ (27.7)	$ (172.3)	$ 113.8	$ (155.4)
Other comprehensive income (loss), net of tax
Change in foreign currency translation, net of tax	4.7	26.3	(57.2)	73.5
Total other comprehensive income (loss)	4.7	26.3	(57.2)	73.5
Comprehensive (loss) income	(23.0)	(146.0)	56.6	(81.9)
Income attributable to non-controlling interests	(0.3)	(4.2)	(0.9)	(13.2)
Comprehensive (loss) income attributable to Sirius Group's common shareholder	$ (23.3)	$ (150.2)	$ 55.7	$ (95.1)