Segment information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Operations By Segment

The following tables present the Statement of Operations by segment:

For the Three Months Ended September 30, 2019 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	3,452		$	1,251	$	938	$	2,228	$	141		$	612		$	—		$	8,622
Net premiums earned	3,185			1,187		941		2,256		160			598			—			8,327
Losses and loss expenses	2,051			674		866		1,154		79			190			38			5,052
Policy benefits	—			—		—		—		—			158			—			158
Policy acquisition costs	459			240		56		630		42			176			—			1,603
Administrative expenses	256			72		4		257		9			80			74			752
Underwriting income (loss)	419			201		15		215		30			(6		)	(112		)	762
Net investment income (loss)	532			66		8		148		55			92			(28		)	873
Other (income) expense	(1		)	1		—		3		(16		)	(10		)	(34		)	(57		)
Amortization expense of purchased intangibles	—			3		7		11		—			1			54			76
Segment income (loss)	$	952		$	263	$	16	$	349	$	101		$	95		$	(160	)	$	1,616
Net realized gains (losses) including OTTI																(155		)	(155		)
Interest expense																138			138
Chubb integration expenses																2			2
Income tax expense																230			230
Net income (loss)																$	(685	)	$	1,091

For the Three Months Ended September 30, 2018 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance			Global Reinsurance			Life Insurance		Corporate			Chubb Consolidated
Net premiums written	$	3,199		$	1,218	$	884	$	2,081		$	164		$	564	$	—		$	8,110
Net premiums earned	3,019			1,167		857		2,157			157			551		—			7,908
Losses and loss expenses	1,881			860		719		1,114			86			195		13			4,868
Policy benefits	—			—		—		—			—			127		—			127
Policy acquisition costs	458			236		49		582			40			139		—			1,504
Administrative expenses	251			69		2		252			10			77		58			719
Underwriting income (loss)	429			2		87		209			21			13		(71		)	690
Net investment income (loss)	503			59		7		155			63			85		(49		)	823
Other (income) expense	(1		)	—		—		(7		)	(13		)	20		(144		)	(145		)
Amortization expense of purchased intangibles	—			4		7		8			—			—		64			83
Segment income (loss)	$	933		$	57	$	87	$	363		$	97		$	78	$	(40	)	$	1,575
Net realized gains (losses) including OTTI																19			19
Interest expense																164			164
Chubb integration expenses																16			16
Income tax expense																183			183
Net income (loss)																$	(384	)	$	1,231

For the Nine Months Ended September 30, 2019 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance		Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	9,937		$	3,616	$	1,534	$	6,881	$	540		$	1,770		$	—		$	24,278
Net premiums earned	9,660			3,509		1,374		6,595		487			1,730			—			23,355
Losses and loss expenses	6,238			2,178		1,155		3,385		245			581			83			13,865
Policy benefits	—			—		—		—		—			515			—			515
Policy acquisition costs	1,377			708		90		1,855		127			454			—			4,611
Administrative expenses	755			211		9		771		26			237			211			2,220
Underwriting income (loss)	1,290			412		120		584		89			(57		)	(294		)	2,144
Net investment income (loss)	1,563			194		22		443		166			278			(98		)	2,568
Other (income) expense	(4		)	2		1		10		(40		)	(57		)	(238		)	(326		)
Amortization expense of purchased intangibles	—			9		21		34		—			2			163			229
Segment income (loss)	$	2,857		$	595	$	120	$	983	$	295		$	276		$	(317	)	$	4,809
Net realized gains (losses) including OTTI																(475		)	(475		)
Interest expense																418			418
Chubb integration expenses																9			9
Income tax expense																626			626
Net income (loss)																$	(1,845	)	$	3,281

For the Nine Months Ended September 30, 2018 (in millions of U.S. dollars)	North America Commercial P&C Insurance			North America Personal P&C Insurance		North America Agricultural Insurance		Overseas General Insurance			Global Reinsurance			Life Insurance			Corporate			Chubb Consolidated
Net premiums written	$	9,342		$	3,601	$	1,380	$	6,664		$	554		$	1,688		$	—		$	23,229
Net premiums earned	9,325			3,463		1,251		6,425			492			1,643			—			22,599
Losses and loss expenses	5,873			2,474		955		3,263			236			584			72			13,457
Policy benefits	—			—		—		—			—			428			—			428
Policy acquisition costs	1,378			701		74		1,754			120			405			—			4,432
Administrative expenses	735			202		—		757			29			235			200			2,158
Underwriting income (loss)	1,339			86		222		651			107			(9		)	(272		)	2,124
Net investment income (loss)	1,516			177		20		461			192			253			(162		)	2,457
Other (income) expense	(20		)	1		1		(12		)	(26		)	24			(275		)	(307		)
Amortization expense of purchased intangibles	—			10		21		29			—			1			192			253
Segment income (loss)	$	2,875		$	252	$	220	$	1,095		$	325		$	219		$	(351	)	$	4,635
Net realized gains (losses) including OTTI																	35			35
Interest expense																	488			488
Chubb integration expenses																	39			39
Income tax expense																	536			536
Net income (loss)																	$	(1,379	)	$	3,607