Property and Casualty Unpaid Losses and Loss Expenses (Tables)

12 Months Ended

Dec. 31, 2012

Liability for Claims and Claims Adjustment Expense [Abstract]

Schedule of reconciliation of property and casualty beginning and ending loss and loss expense reserve balances

(in millions)	Property and Casualty Group
	2012			2011			2010
Losses and loss expense reserves at January 1, – Gross	$	3,499		$	3,584		$	3,598
Less: reinsurance recoverable	151			188			200
Losses and loss expense reserves at January 1, – Net	3,348			3,396			3,398
Incurred losses and loss expenses related to:
Current accident year	3,494			3,616			3,053
Prior accident years	(115		)	(272		)	(244		)
Total incurred losses and loss expenses	3,379			3,344			2,809
Paid losses and loss expenses related to:
Current accident year	2,166			2,360			1,855
Prior accident years	1,117			1,032			956
Total paid losses and loss expenses	3,283			3,392			2,811
Losses and loss expense reserves at December 31, – Net	3,444			3,348			3,396
Add: reinsurance recoverable	154			151			188
Losses and loss expense reserves at December 31, – Gross	$	3,598		$	3,499		$	3,584