Investment and derivative contract gains (losses) (Tables)

12 Months Ended

Dec. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of investment and derivative gains and losses

Investment and derivative contract gains (losses) for each of the three years ending December 31, 2023 are summarized as follows (in millions).

	2023			2022			2021
Investment gains (losses):
Equity securities:
Change in unrealized investment gains (losses) during the year on    securities held at the end of the year	$	69,144		$	(63,120	)	$	76,375
Investment gains (losses) during the year on securities sold		2,698			(3,927	)		997
		71,842			(67,047	)		77,372
Fixed maturity securities:
Gross realized gains		139			134			85
Gross realized losses		(86	)		(684	)		(29	)
Other		2,960			(26	)		148
Investment gains (losses)		74,855			(67,623	)		77,576
Derivative contract gains (losses)		—			(276	)		966
	$	74,855		$	(67,899	)	$	78,542