Property Casualty Loss and Loss Expenses (Tables)

6 Months Ended

Jun. 30, 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 June 30,						Six months ended June 30,
	2018			2017			2018			2017
Gross loss and loss expense reserves, beginning of   period	$	5,293		$	5,128		$	5,219		$	5,035
Less reinsurance recoverable	184			297			187			298
Net loss and loss expense reserves, beginning of   period	5,109			4,831			5,032			4,737
Net incurred loss and loss expenses related to:
Current accident year	852			832			1,691			1,658
Prior accident years	(31		)	(38		)	(79		)	(76		)
Total incurred	821			794			1,612			1,582
Net paid loss and loss expenses related to:
Current accident year	341			373			536			558
Prior accident years	354			322			873			831
Total paid	695			695			1,409			1,389
Net loss and loss expense reserves, end of period	5,235			4,930			5,235			4,930
Plus reinsurance recoverable	188			283			188			283
Gross loss and loss expense reserves, end of period	$	5,423		$	5,213		$	5,423		$	5,213