Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31				April 1, 2019 through May 1, 2019
(in millions of U.S. dollars, except share data)	2019		2018
Number of shares repurchased	2,753,754		—		550,000
Cost of shares repurchased	$	367	$	—	$	77
Repurchase authorization remaining at end of period	$	1,112	$	1,000	$	1,035