Label	Element	Value
Catastrophe [Member] | UPC, Subsidiary [Member] | Second And Subsequent Catastrophic Events [Member]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	us-gaap_ReinsuranceRetentionPolicyExcessRetentionAmountReinsured	$ 95,000,000
Catastrophe [Member] | UPC, Subsidiary [Member] | Maximum [Member] | First Catastrophic Event [Member]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	us-gaap_ReinsuranceRetentionPolicyExcessRetentionAmountReinsured	1,173,122,000
Windstorm [Member] | FLORIDA | Catastrophe [Member] | UPC, Subsidiary [Member] | Second Catastrophic Event [Member]
Reinsurance Retention Policy, Amount Retained	us-gaap_ReinsuranceRetentionPolicyAmountRetained	10,000,000
Windstorm [Member] | FLORIDA | Catastrophe [Member] | UPC, Subsidiary [Member] | Third And Subsequent Catastrophic Events [Member]
Reinsurance Retention Policy, Amount Retained	us-gaap_ReinsuranceRetentionPolicyAmountRetained	$ 5,000,000