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Fair Value of Financial Instruments
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
 
White Mountains records its financial instruments at fair value with the exception of the NSM Bank Facility and the MediaAlpha Bank Facility, which are recorded as debt at face value less unamortized original issue discount.
The following table presents the fair value and carrying value of this financial instrument as of September 30, 2019 and December 31, 2018:
 
 
September 30, 2019
 
December 31, 2018
Millions
 
Fair
Value
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
NSM Bank Facility
 
$
219.7

 
$
217.7

 
$
176.1

 
$
176.6

MediaAlpha Bank Facility
 
$

 
$

 
$
14.6

 
$
14.2

Other Operations debt
 
$
11.3

 
$
10.8

 
$

 
$



The fair value estimates for the NSM Bank Facility and the MediaAlpha Bank Facility have been determined based on a discounted cash flows approach and are considered to be Level 3 measurements. As a result of the MediaAlpha Transaction, White Mountains’s remaining ownership interest in MediaAlpha no longer meets the criteria for a controlling ownership interest and accordingly, White Mountains deconsolidated MediaAlpha as of February 26, 2019. See Note 2 — “Significant Transactions”.