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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value of Financial Instruments  
Summary of the fair value and carrying value of financial instruments

The following summarizes the carrying value and fair value of financial instruments that are not accounted for at fair value.

 

 

 

December 31, 2011

 

December 31, 2010

 

Millions

 

Fair
Value

 

Carrying
Value

 

Fair
Value

 

Carrying
Value

 

OBH Senior Notes

 

$

277.4

 

$

269.8

 

$

435.1

 

$

419.6

 

SIG Senior Notes

 

418.6

 

399.3

 

390.9

 

399.2

 

SIG Preference Shares

 

217.5

 

250.0

 

212.5

 

250.0