Investment gains/losses (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Summary of investment gains and losses

Investment gains/losses for each of the three years ending December 31, 2018 are summarized below (in millions).

	2018		2017		2016
Equity securities:
Unrealized investment gains/losses on securities held at the end of the period	$	(22,729)	$	—	$	—
Investment gains/losses during 2018 on securities sold in 2018		291		—		—
Gross realized gains		—		2,237		7,853
Gross realized losses		—		(919)		(415)
		(22,438)		1,318		7,438
Fixed maturity securities:
Gross realized gains		480		103		58
Gross realized losses		(227)		(22)		(51)
Other		30		11		108
	$	(22,155)	$	1,410	$	7,553