Investment gains/losses (Tables)

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Summary of investment gains and losses

Investment gains/losses in the first quarter of 2020 and 2019 are summarized as follows (in millions).

	First Quarter
	2020			2019
Equity securities:
Unrealized investment gains (losses) on securities    held at the end of the period	$	(68,482	)	$	19,393
Investment gains (losses) during the period		(410	)		161
		(68,892	)		19,554
Fixed maturity securities:
Gross realized gains		16			5
Gross realized losses		(6	)		(10	)
Other		—			3
	$	(68,882	)	$	19,552