Property Casualty Loss and Loss Expenses (Tables)

3 Months Ended

Mar. 31, 2020

Premiums Written, Net [Abstract]

Consolidated Property Casualty Loss And Loss Expense Reserves

This table summarizes activity for our consolidated property casualty loss and loss expense reserves:

(Dollars in millions)	Three months ended March 31,
	2020			2019
Gross loss and loss expense reserves, beginning of period	$	6,088		$	5,646
Less reinsurance recoverable	342			238
Net loss and loss expense reserves, beginning of period	5,746			5,408
Net loss and loss expense reserves related to acquisition of Cincinnati Global at   February 28, 2019	—			246
Net incurred loss and loss expenses related to:
Current accident year	963			857
Prior accident years	(33		)	(67		)
Total incurred	930			790
Net paid loss and loss expenses related to:
Current accident year	186			177
Prior accident years	631			647
Total paid	817			824
Net loss and loss expense reserves, end of period	5,859			5,620
Plus reinsurance recoverable	294			266
Gross loss and loss expense reserves, end of period	$	6,153		$	5,886