Unpaid Losses and Loss Expenses and Policy Benefits for Life and Annuity Contracts (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure - Unpaid Losses and Loss Expenses and Policy Benefits for Life and Annuity Contracts [Abstract]

Schedule Of Unpaid Losses And Loss Expenses By Type Table [Text Block]

		2013		2012
Case reserves	$	4,663,164	$	4,872,591
ACRs		403,145		354,382
IBNR reserves		5,580,009		5,482,398
Total unpaid losses and loss expenses	$	10,646,318	$	10,709,371

Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense [Text Block]

			2013		2012		2011
Gross liability at beginning of year		$	10,709,371	$	11,273,091	$	10,666,604
Reinsurance recoverable at beginning of year			291,330		353,105		348,747
Net liability at beginning of year			10,418,041		10,919,986		10,317,857
Net incurred losses related to:
	Current year		3,118,755		2,785,694		4,252,766
	Prior years		(721,499)		(628,065)		(530,457)
			2,397,256		2,157,629		3,722,309
Change in Paris Re Reserve Agreement			(49,544)		(86,163)		(61,383)
Net paid losses related to:
	Current year		242,053		237,783		930,407
	Prior years		2,159,506		2,467,279		2,060,152
			2,401,559		2,705,062		2,990,559
Effects of foreign exchange rate changes			14,740		131,651		(68,238)
Net liability at end of year			10,378,934		10,418,041		10,919,986
Reinsurance recoverable at end of year			267,384		291,330		353,105
Gross liability at end of year		$	10,646,318	$	10,709,371	$	11,273,091

Reconciliation Of Loss And Loss Expenses Including Life Policy Benefits Table [Text Block]

			2013		2012		2011
Net incurred losses related to:
	Non-life	$	2,397,256	$	2,157,629	$	3,722,309
	Life and Health		760,552		646,981		650,261
Losses and loss expenses and life policy benefits		$	3,157,808	$	2,804,610	$	4,372,570

Net Non Life Prior Year Loss Development Table [Text Block]

			2013		2012		2011
Net favorable prior year loss development:
Non-life sub-segment
	North America	$	222,839	$	218,483	$	189,180
	Global (Non-U.S.) P&C		180,052		114,279		115,995
	Global Specialty		227,383		250,523		128,975
	Catastrophe		91,225		44,780		96,307
Total net favorable prior year loss development		$	721,499	$	628,065	$	530,457