Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Share Repurchase Program [Table Text Block]

The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:

	Three Months Ended				April 1, 2021 through April 29, 2021
			March 31
(in millions of U.S. dollars, except share data)	2021		2020
Number of shares repurchased	3,110,000		2,266,150		450,000
Cost of shares repurchased	$	519	$	326	$	76
Repurchase authorization remaining at end of period	$	1,982	$	1,124	$	1,906