Property Casualty Loss and Loss Expenses (Tables)

3 Months Ended

Mar. 31, 2018

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,
	2018			2017
Gross loss and loss expense reserves, beginning of period	$	5,219		$	5,035
Less reinsurance recoverable	187			298
Net loss and loss expense reserves, beginning of period	5,032			4,737
Net incurred loss and loss expenses related to:
Current accident year	839			826
Prior accident years	(48		)	(38		)
Total incurred	791			788
Net paid loss and loss expenses related to:
Current accident year	195			185
Prior accident years	519			509
Total paid	714			694
Net loss and loss expense reserves, end of period	5,109			4,831
Plus reinsurance recoverable	184			297
Gross loss and loss expense reserves, end of period	$	5,293		$	5,128