Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Operations By Segment

Statement of Operations by Segment

For the year ended December 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	$	6,851	$	5,756	$	979		$	1,786		$	–		$	15,372
Net premiums earned		6,911		5,737		1,003			1,736			–			15,387
Losses and loss expenses		5,276		3,073		621			549			1			9,520
Policy benefits		–		–		–			401			–			401
Policy acquisition costs		613		1,393		185			255			1			2,447
Administrative expenses		592		945		52			295			168			2,052
Underwriting income (loss)		430		326		145			236			(170	)		967
Net investment income		1,170		548		287			224			13			2,242
Net realized gains (losses) including OTTI		34		33		(50	)		(806	)		(6	)		(795	)
Interest expense		15		5		2			11			217			250
Other (income) expense:
Losses from separate account assets		–		–		–			36			–			36
Other		5		–		(1	)		18			15			37
Income tax expense (benefit)		394		169		30			50			(137	)		506
Net income (loss)	$	1,220	$	733	$	351		$	(461	)	$	(258	)	$	1,585

Statement of Operations by Segment

For the year ended December 31, 2010 (in millions of U.S. dollars)	Insurance – North American			Insurance – Overseas General			Global Reinsurance			Life			Corporate and Other			ACE Consolidated
Net premiums written	$	5,797		$	5,280		$	1,075		$	1,556		$	–		$	13,708
Net premiums earned		5,651			5,240			1,071			1,542			–			13,504
Losses and loss expenses		3,918			2,647			518			496			–			7,579
Policy benefits		–			4			–			353			–			357
Policy acquisition costs		625			1,251			204			257			–			2,337
Administrative expenses		561			840			55			228			174			1,858
Underwriting income (loss)		547			498			294			208			(174	)		1,373
Net investment income		1,138			475			288			172			(3	)		2,070
Net realized gains (losses) including OTTI		417			123			93			(192	)		(9	)		432
Interest expense		9			1			–			3			211			224
Other (income) expense		(22	)		(13	)		(23	)		20			22			(16	)
Income tax expense (benefit)		436			173			42			62			(154	)		559
Net income (loss)	$	1,679		$	935		$	656		$	103		$	(265	)	$	3,108

Statement of Operations by Segment

For the year ended December 31, 2009 (in millions of U.S. dollars)	Insurance – North American		Insurance – Overseas General			Global Reinsurance			Life			Corporate and Other			ACE Consolidated
Net premiums written	$	5,641	$	5,145		$	1,038		$	1,475		$	–		$	13,299
Net premiums earned		5,684		5,147			979			1,430			–			13,240
Losses and loss expenses		4,013		2,597			330			482			–			7,422
Policy benefits		–		4			–			321			–			325
Policy acquisition costs		517		1,202			195			216			–			2,130
Administrative expenses		572		783			55			243			158			1,811
Underwriting income (loss)		582		561			399			168			(158	)		1,552
Net investment income		1,094		479			278			176			4			2,031
Net realized gains (losses) including OTTI		10		(20	)		(17	)		(15	)		(154	)		(196	)
Interest expense		1		–			–			–			224			225
Other (income) expense		36		20			2			2			25			85
Income tax expense (benefit)		384		186			46			48			(136	)		528
Net income (loss)	$	1,265	$	814		$	612		$	279		$	(421	)	$	2,549

Net Premiums Earned For Segment By Product

For the year ended December 31, 2011 (in millions of U.S. dollars)	Property & All Other		Casualty		Life, Accident & Health		ACE Consolidated
Insurance – North American	$	3,174	$	3,380	$	357	$	6,911
Insurance – Overseas General		2,080		1,415		2,242		5,737
Global Reinsurance		458		545		–		1,003
Life		–		–		1,736		1,736
	$	5,712	$	5,340	$	4,335	$	15,387
For the year ended December 31, 2010
Insurance – North American	$	1,578	$	3,777	$	296	$	5,651
Insurance – Overseas General		1,800		1,424		2,016		5,240
Global Reinsurance		520		551		–		1,071
Life		–		–		1,542		1,542
	$	3,898	$	5,752	$	3,854	$	13,504
For the year ended December 31, 2009
Insurance – North American	$	1,690	$	3,734	$	260	$	5,684
Insurance – Overseas General		1,787		1,420		1,940		5,147
Global Reinsurance		546		433		–		979
Life		–		–		1,430		1,430
	$	4,023	$	5,587	$	3,630	$	13,240

Net Premiums Earned By Geographic Region

Year ended	North America		Europe		Asia Pacific/Far East		Latin America
2011		61%		18%		14%		7%
2010		61%		20%		13%		6%
2009		63%		20%		12%		5%