Shareholders' equity note (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Dividends Declared [Table Text Block]

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):

	Year Ended December 31
		2022			2021			2020
	CHF	USD		CHF	USD		CHF	USD
Total dividend distributions per common share	3.11	$	3.29	2.88	$	3.18	2.89	$	3.09

Schedule of changes in Common Shares issued and outstanding

	Year Ended December 31
	2022	2021	2020
Common Shares authorized and issued, beginning of year	474,021,114	477,605,264	479,783,864
Cancellation of treasury shares	(27,644,500)	(3,584,150)	(2,178,600)
Common Shares authorized and issued, end of year	446,376,614	474,021,114	477,605,264
Common Shares in treasury, beginning of year (at cost)	(47,448,502)	(26,872,639)	(27,812,297)
Net shares issued under employee share-based compensation plans	2,947,272	3,484,487	2,345,208
Shares repurchased	(14,925,028)	(27,644,500)	(3,584,150)
Cancellation of treasury shares	27,644,500	3,584,150	2,178,600
Common Shares in treasury, end of year (at cost)	(31,781,758)	(47,448,502)	(26,872,639)
Common Shares outstanding, end of year	414,594,856	426,572,612	450,732,625

Share Repurchase Program [Table Text Block]

Share repurchases may be in the open market, in privately negotiated transactions, block trades, accelerated repurchases and through option or other forward transactions. The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Year Ended December 31						January 1, 2023 through
(in millions of U.S. dollars, except share data)	2022		2021		2020		February 23, 2023
Number of shares repurchased	14,925,028		27,644,500		3,584,150		1,633,300
Cost of shares repurchased	$	3,014	$	4,861	$	516	$	347

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents changes in accumulated other comprehensive income (loss):

	Year Ended December 31
(in millions of U.S. dollars)	2022		2021		2020
Accumulated other comprehensive income (loss) (AOCI)
Net unrealized appreciation (depreciation) on investments
Balance – beginning of year, net of tax	$	2,256	$	4,673	$	2,543
Change in year, before reclassification from AOCI (before tax)	(11,627)		(2,935)		2,311
Amounts reclassified from AOCI (before tax)	1,049		(3)		281
Change in year, before tax	(10,578)		(2,938)		2,592
Income tax (expense) benefit	1,043		521		(462)
Balance – end of year, net of tax	(7,279)		2,256		4,673
Cumulative foreign currency translation adjustment
Balance – beginning of year, net of tax	(2,146)		(1,637)		(1,939)
Change in year, before reclassification from AOCI (before tax)	(982)		(530)		306
Amounts reclassified from AOCI (before tax)	(4)		—		—
Change in year, before tax	(986)		(530)		306
Income tax (expense) benefit	59		21		(4)
Balance – end of year, net of tax	(3,073)		(2,146)		(1,637)
Fair value hedging instruments
Balance – beginning of year, net of tax	—		—		—
Change in year, before reclassification from AOCI (before tax)	17		—		—
Amounts reclassified from AOCI (before tax)	(100)		—		—
Change in year, before tax	(83)		—		—
Income tax benefit	17		—		—
Balance – end of year, net of tax	(66)		—		—
Postretirement benefit liability adjustment
Balance – beginning of year, net of tax	240		(167)		15
Change in year, before tax	(17)		522		(232)
Income tax (expense) benefit	2		(115)		50
Balance – end of year, net of tax	225		240		(167)
Accumulated other comprehensive income (loss)	$	(10,193)	$	350	$	2,869

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

The following table presents reclassifications from accumulated other comprehensive income (loss) to the consolidated statements of operations:

							Consolidated Statement of Operations Location
	Year Ended December 31
(in millions of U.S. dollars)	2022		2021		2020
Fixed maturities available for sale	$	(1,049)	$	3	$	(281)	Net realized gains (losses)
Income tax benefit	170		6		36		Income tax expense
	$	(879)	$	9	$	(245)	Net income
Cumulative foreign currency translation adjustment
Cross-currency swaps	$	4	$	—	$	—	Interest Expense
Income tax expense	(1)		—		—		Income tax expense
	$	3	$	—	$	—	Net income
Net gains (losses) of fair value hedging instruments
Cross-currency swaps	$	105	$	—	$	—	Net realized gains (losses)
Cross-currency swaps	(5)		—		—		Interest Expense
Income tax expense	(21)		—		—		Income tax expense
	$	79	$	—	$	—	Net income
Total amounts reclassified from AOCI	$	(797)	$	9	$	(245)