Investment gains/losses (Tables)

9 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Summary of investment gains and losses

A summary of investment gains and losses in the third quarter and first nine months of 2018 and 2017 follows (in millions).

	Third Quarter				First Nine Months
	2018		2017		2018		2017
Equity securities:
Unrealized investment gains/losses on securities held at the end of the period	$	14,294	$	—	$	12,126	$	—
Investment gains/losses during 2018 on securities sold in 2018		244		—		307		—
Gross realized gains		—		1,011		—		1,795
Gross realized losses		—		(419)		—		(626)
		14,538		592		12,433		1,169
Fixed maturity securities:
Gross realized gains		44		56		451		82
Gross realized losses		(10)		(2)		(152)		(16)
Other		(3)		11		18		27
	$	14,569	$	657	$	12,750	$	1,262