Segment information (Tables)

3 Months Ended

Mar. 31, 2013

Segment Reporting [Abstract]

Operations By Segment

Statement of Operations by Segment

For the Three Months Ended March 31, 2013	Insurance – North American P&C			Insurance – North American Agriculture		Insurance – Overseas General			Global Reinsurance			Life			Corporate and Other			ACE Consolidated
(in millions of U.S. dollars)
Net premiums written	$	1,284		$	113	$	1,620		$	279		$	502		$	—		$	3,798
Net premiums earned	1,338			52		1,459			247			477			—			3,573
Losses and loss expenses	878			32		747			106			157			6			1,926
Policy benefits	—			—		—			—			131			—			131
Policy acquisition costs	143			4		339			48			80			—			614
Administrative expenses	125			5		236			12			85			51			514
Underwriting income (loss)	192			11		137			81			24			(57		)	388
Net investment income	251			6		132			72			63			7			531
Net realized gains (losses) including OTTI	26			—		34			20			127			(1		)	206
Interest (income) expense	(2		)	—		1			1			4			56			60
Other (income) expense:
(Gains) losses from fair value changes in separate account assets	—			—		—			—			(4		)	—			(4		)
Other	(15		)	8		(1		)	(8		)	—			10			(6		)
Income tax expense (benefit)	94			2		46			8			13			(41		)	122
Net income (loss)	$	392		$	7	$	257		$	172		$	201		$	(76	)	$	953

Statement of Operations by Segment

For the Three Months Ended March 31, 2012	Insurance – North American P&C			Insurance – North American Agriculture			Insurance – Overseas General		Global Reinsurance			Life			Corporate and Other			ACE Consolidated
(in millions of U.S. dollars)
Net premiums written	$	1,174		$	119		$	1,528	$	263		$	488		$	—		$	3,572
Net premiums earned	1,228			59			1,391		230			473			—			3,381
Losses and loss expenses	811			38			705		102			148			—			1,804
Policy benefits	—			—			—		—			147			—			147
Policy acquisition costs	137			(10		)	335		43			76			1			582
Administrative expenses	150			(3		)	229		12			78			44			510
Underwriting income (loss)	130			34			122		73			24			(45		)	338
Net investment income	267			7			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	(9		)	8			—		(5		)	9			12			15
Income tax expense (benefit)	83			8			38		6			11			(36		)	110
Net income (loss)	$	319		$	25		$	234	$	155		$	311		$	(71	)	$	973

Net Premiums Earned For Segment By Product

For the Three Months Ended March 31, 2013	Property & All Other		Casualty		Life, Accident & Health		ACE Consolidated
(in millions of U.S. dollars)
Insurance – North American P&C	$	347	$	902	$	89	$	1,338
Insurance – North American Agriculture	52		—		—		52
Insurance – Overseas General	585		339		535		1,459
Global Reinsurance	135		112		—		247
Life	—		—		477		477
	$	1,119	$	1,353	$	1,101	$	3,573
For the Three Months Ended March 31, 2012
Insurance – North American P&C	$	322	$	817	$	89	$	1,228
Insurance – North American Agriculture	59		—		—		59
Insurance – Overseas General	538		333		520		1,391
Global Reinsurance	110		120		—		230
Life	—		—		473		473
	$	1,029	$	1,270	$	1,082	$	3,381