Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Segment Information [Abstract]

Operations By Segment

Statement of Operations by Segment

For the Three Months Ended March 31, 2012

(in millions of U.S. dollars)

	Insurance – North American			Insurance – Overseas General		Global Reinsurance			Life			Corporate and Other			ACE Consolidated
Net premiums written	$	1,293		$	1,528	$	263		$	488		$	—		$	3,572
Net premiums earned		1,287			1,391		230			473			—			3,381
Losses and loss expenses		849			705		102			148			—			1,804
Policy benefits		—			—		—			147			—			147
Policy acquisition costs		127			335		43			76			1			582
Administrative expenses		147			229		12			78			44			510
Underwriting income (loss)		164			122		73			24			(45	)		338
Net investment income		274			131		71			61			7			544
Net realized gains (losses) including OTTI		(1	)		20		13			231			(3	)		260
Interest expense		3			1		1			3			54			62
Other (income) expense:
(Gains) losses from fair value changes in separate account assets		—			—		—			(18	)		—			(18	)
Other		(1	)		—		(5	)		9			12			15
Income tax expense (benefit)		91			38		6			11			(36	)		110
Net income (loss)	$	344		$	234	$	155		$	311		$	(71	)	$	973

Statement of Operations by Segment

For the Three Months Ended March 31, 2011

(in millions of U.S. dollars)

	Insurance – North American			Insurance – Overseas General			Global Reinsurance			Life			Corporate and Other			ACE Consolidated
Net premiums written	$	1,285		$	1,410		$	315		$	436		$	—		$	3,446
Net premiums earned		1,346			1,278			260			425			—			3,309
Losses and loss expenses		994			852			279			138			—			2,263
Policy benefits		—			—			—			91			—			91
Policy acquisition costs		136			301			46			76			—			559
Administrative expenses		148			223			12			74			42			499
Underwriting income (loss)		68			(98	)		(77	)		46			(42	)		(103	)
Net investment income		295			131			72			46			—			544
Net realized gains (losses) including OTTI		(11	)		(9	)		(13	)		(13	)		1			(45	)
Interest expense		4			1			—			3			55			63
Other (income) expense:		(16	)		(2	)		(6	)		6			5			(13	)
Income tax expense (benefit)		89			17			10			14			(34	)		96
Net income (loss)	$	275		$	8		$	(22	)	$	56		$	(67	)	$	250

Net Premiums Earned For Segment By Product

	Property & All Other		Casualty		Life, Accident & Health		ACE Consolidated
	(in millions of U.S. dollars)
For the Three Months Ended March 31, 2012
Insurance – North American	$	381	$	817	$	89	$	1,287
Insurance – Overseas General		538		333		520		1,391
Global Reinsurance		110		120		—		230
Life		—		—		473		473
	$	1,029	$	1,270	$	1,082	$	3,381
For the Three Months Ended March 31, 2011
Insurance – North American	$	370	$	890	$	86	$	1,346
Insurance – Overseas General		431		342		505		1,278
Global Reinsurance		112		148		—		260
Life		—		—		425		425
	$	913	$	1,380	$	1,016	$	3,309