Property Casualty Loss and Loss Expenses (Tables)

9 Months Ended

Sep. 30, 2019

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 September 30,						Nine months ended September 30,
	2019			2018			2019			2018
Gross loss and loss expense reserves, beginning    of period	$	5,954		$	5,423		$	5,646		$	5,219
Less reinsurance recoverable	269			188			238			187
Net loss and loss expense reserves, beginning    of period	5,685			5,235			5,408			5,032
Net loss and loss expense reserves related to    acquisition of MSP at February 28, 2019	—			—			246			—
Net incurred loss and loss expenses related to:
Current accident year	916			857			2,720			2,548
Prior accident years	(52		)	(44		)	(203		)	(123		)
Total incurred	864			813			2,517			2,425
Net paid loss and loss expenses related to:
Current accident year	457			392			995			928
Prior accident years	373			313			1,457			1,186
Total paid	830			705			2,452			2,114
Net loss and loss expense reserves, end of period	5,719			5,343			5,719			5,343
Plus reinsurance recoverable	278			186			278			186
Gross loss and loss expense reserves, end of    period	$	5,997		$	5,529		$	5,997		$	5,529