Common Shareholders’ Equity and Noncontrolling Interests (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of noncontrolling interest

The following table presents the balance of noncontrolling interests included in White Mountains’s total equity and the related percentage of each consolidated entity’s total equity owned by noncontrolling shareholders as of December 31, 2023 and 2022:

	December 31, 2023				December 31, 2022
$ in Millions	Noncontrolling Percentage (1)		Noncontrolling Equity		Noncontrolling Percentage (1)		Noncontrolling Equity
Noncontrolling interests, excluding BAM
HG Global	3.1	%	$	.8	3.1	%	$	(.6)
Ark	28.0	%	336.9		28.0	%	247.9
Kudu	10.5	%	113.8		10.8	%	75.1
Other	various		9.4		various		20.4
Total, excluding BAM			460.9				342.8
BAM	100.0	%	(139.8)		100.0	%	(154.7)
Total noncontrolling interests			$	321.1			$	188.1

(1) The noncontrolling percentage represents the basic ownership interests held by noncontrolling shareholders with the exception of HG Global, for which the noncontrolling percentage represents the preferred share ownership held by noncontrolling shareholders.