Segment information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Operations By Segment

The following tables present the Statement of Operations by segment:

For the Three Months Ended March 31, 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	$	2,951		$	1,056	$	130		$	2,395	$	202		$	579		$	—		$	7,313
Net premiums earned	3,085			1,154		55			2,114		168			561			—			7,137
Losses and loss expenses	1,973			757		(27		)	1,106		76			202			11			4,098
Policy benefits	—			—		—			—		—			196			—			196
Policy acquisition costs	459			231		7			596		43			128			—			1,464
Administrative expenses	240			68		1			249		10			79			63			710
Underwriting income (loss)	413			98		74			163		39			(44		)	(74		)	669
Net investment income (loss)	510			64		10			144		56			89			(37		)	836
Other (income) expense	(5		)	—		—			4		(9		)	(40		)	11			(39		)
Amortization expense of purchased intangibles	—			3		7			11		—			—			55			76
Segment income (loss)	$	928		$	159	$	77		$	292	$	104		$	85		$	(177	)	$	1,468
Net realized gains (losses) including OTTI																	(97		)	(97		)
Interest expense																	140			140
Chubb integration expenses																	3			3
Income tax expense																	188			188
Net income (loss)																	$	(605	)	$	1,040

For the Three Months Ended March 31, 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	$	2,812		$	1,048		$	108		$	2,384	$	193		$	559		$	—		$	7,104
Net premiums earned	3,029			1,140			43			2,107		168			540			—			7,027
Losses and loss expenses	1,908			886			(53		)	1,078		67			205			11			4,102
Policy benefits	—			—			—			—		—			151			—			151
Policy acquisition costs	472			237			(1		)	588		40			128			—			1,464
Administrative expenses	231			65			(3		)	239		10			78			72			692
Underwriting income (loss)	418			(48		)	100			202		51			(22		)	(83		)	618
Net investment income (loss)	503			59			7			151		64			83			(61		)	806
Other (income) expense	(6		)	—			—			7		(7		)	(4		)	(37		)	(47		)
Amortization expense of purchased intangibles	—			3			7			10		—			1			64			85
Segment income (loss)	$	927		$	8		$	100		$	336	$	122		$	64		$	(171	)	$	1,386
Net realized gains (losses) including OTTI																		(2		)	(2		)
Interest expense																		157			157
Chubb integration expenses																		10			10
Income tax expense																		135			135
Net income (loss)																		$	(475	)	$	1,082