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Earnings per share (Tables)
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Schedule of computation of basic and diluted earnings per common share
The following table sets forth the computation of basic and diluted earnings per common share for the years ended December 31, 2019, 2018, and 2017:
(Millions, except share and per share information)
2019

2018

2017

Basic earnings per share
 
 
 
Numerator:
 
 
 
Net (loss)
$
(45.6
)
$
(16.7
)
$
(136.3
)
Less: Income attributable to non-controlling interests
(1.7
)
(1.4
)
(13.7
)
Change in carrying value of SeriesᅠB preference shares
9.2

(36.4
)

Less: Accrued dividends on SeriesᅠA redeemable preference shares

(2.6
)
(6.1
)
Add: Redemption of SeriesᅠA redeemable preference shares

13.8


Net (loss) attributable to Sirius Group common shareholders
$
(38.1
)
$
(43.3
)
$
(156.1
)
Denominator:
 
 
 
Weighted average shares outstanding for basic earnings per share(1)(2)
115,234,105

119,253,924

120,000,000

Basic earnings per share
$
(0.33
)
$
(0.36
)
$
(1.30
)
Diluted earnings per share
 
 
 
Numerator:
 
 
 
Net (loss) attributable to Sirius Group common shareholders
$
(38.1
)
$
(43.3
)
$
(156.1
)
Change in carrying value of Series B preference shares
(9.2
)


Net (loss) attributable to Sirius Group common shareholders on a diluted basis
$
(47.3
)
$
(43.3
)
$
(156.1
)
Denominator:
 
 
 
Weighted average shares outstanding for basic earnings per share(1)(2)
115,234,105

119,253,924

120,000,000

Add: Series B preference shares
11,901,670



Weighted average shares outstanding for diluted earnings per share(1)(2)
127,135,775

119,253,924

120,000,000

Diluted earnings per share
$
(0.37
)
$
(0.36
)
$
(1.30
)
(1)As of December 31, 2019, there were a total of 17,057,249 potentially dilutive securities excluded from the calculation of Diluted earnings per share.
(2)As of December 31, 2018, there were a total of 23,433,114 potentially dilutive securities excluded from the calculation of Diluted earnings per share.As of December 31, 2017, there were no potentially dilutive securities.