XML 51 R34.htm IDEA: XBRL DOCUMENT v3.24.0.1
SCHEDULE V - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE V - VALUATION AND QUALIFYING ACCOUNTS
WHITE MOUNTAINS INSURANCE GROUP, LTD.
VALUATION AND QUALIFYING ACCOUNTS

Column AColumn BColumn CColumn DColumn E
Additions (subtractions)
MillionsBalance at beginning of
period		Charged to costs
and expenses		Charged to other
accounts
Deductions described (1)
Balance at end of
period
Years ended:     
December 31, 2023     
Reinsurance recoverables:     
Allowance for uncollectible balances
$7.8 $(.2)$— $.1 $7.7 
December 31, 2022
Reinsurance recoverables:
Allowance for uncollectible balances3.6 4.6 — (.4)7.8 
December 31, 2021
Reinsurance recoverables:2.3 1.3 — — 3.6 
Allowance for uncollectible balances
(1)Represents net collections (charge-offs) of balances receivable and foreign currency translation.