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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2012
Fair Value of Financial Instruments  
Summary of the fair value and carrying value of financial instruments

 

 

 

 

March 31, 2012

 

December 31, 2011

 

Millions

 

Fair
Value

 

Carrying
Value

 

Fair
Value

 

Carrying
Value

 

OBH Senior Notes

 

$

277.7

 

$

269.8

 

$

277.4

 

$

269.8

 

SIG Senior Notes

 

417.8

 

399.3

 

418.6

 

399.3

 

SIG Preference Shares

 

240.0

 

250.0

 

217.5

 

250.0