Other (income) expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity in net income of partially-owned entities	[1]	$ 617	$ 514	$ 418
Gains (losses) from fair value changes in separate account assets	[2]	44	(38)	97
One-time contribution to the Chubb Charitable Foundation		0	0	(50)
Federal excise and capital taxes		(23)	(12)	(35)
Other		(42)	(30)	(30)
Total		596	434	400
Huatai Group [Member]
Equity in net income of partially-owned entities	[1]	$ 74	$ 43	$ 3

[1] Equity in net income of partially-owned entities includes $74 million, $43 million, and $3 million attributable to our investments in Huatai (Huatai Group, Huatai P&C, and Huatai Life) for the years ended December 31, 2019, 2018, and 2017, respectively.

[2] Related to gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.