SCHEDULE III SUPPLEMENTARY INSURANCE INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
HG Global-BAM
SUPPLEMENTARY INSURANCE INFORMATION
Deferred Acquisition Costs	$ 33.1	$ 27.8	$ 22.1
Future Policy Benefits, Losses, Claims and Loss Expenses	0.0	0.0	0.0
Unearned Premiums	266.3	237.5	198.4
Other Policy Claims and Benefits Payable	0.0	0.0	0.0
Premiums Earned	26.9	22.8	16.3
Net Investment Income	17.5	19.5	21.6
Benefits, Claims, Losses and Settlement Expenses	0.0	0.0	0.0
Amortization of Deferred Acquisition Costs	8.3	7.0	5.7
Other Operating Expenses	0.4	0.4	0.4
Premiums Written	55.8	$ 61.7	$ 38.7
Ark
SUPPLEMENTARY INSURANCE INFORMATION
Deferred Acquisition Costs	100.8
Future Policy Benefits, Losses, Claims and Loss Expenses	894.7
Unearned Premiums	495.9
Premiums Earned	637.3
Net Investment Income	2.9
Benefits, Claims, Losses and Settlement Expenses	314.8
Amortization of Deferred Acquisition Costs	111.3
Other Operating Expenses	64.6
Premiums Written	$ 859.1