Investment gains/losses (Tables)

9 Months Ended

Sep. 30, 2019

Investments Debt And Equity Securities [Abstract]

Summary of investment gains and losses

Investment gains/losses in the third quarter and first nine months of 2019 and 2018 are summarized as follows (in millions).

`	Third Quarter						First Nine Months
	2019			2018			2019			2018
Equity securities:
Unrealized investment gains (losses) on securities    held at the end of the period	$	10,489		$	14,294		$	39,546		$	12,126
Investment gains (losses) during the period		135			244			464			307
		10,624			14,538			40,010			12,433
Fixed maturity securities:
Gross realized gains		59			44			71			451
Gross realized losses		(2	)		(10	)		(18	)		(152	)
Other		11			(3	)		16			18
	$	10,692		$	14,569		$	40,079		$	12,750