Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Dividends Declared [Table Text Block]

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
(in millions of U.S. dollars, except share data)	2018		2017
Number of shares repurchased	—		1,036,064
Cost of shares repurchased	$	—	$	140
Repurchase authorization remaining at end of period	$	1,000	$	860