Investments in fixed maturity securities (Tables)

6 Months Ended

Jun. 30, 2020

Investments Debt And Equity Securities [Abstract]

Schedule of investments in securities with fixed maturities

Investments in fixed maturity securities as of June 30, 2020 and December 31, 2019 are summarized by type below (in millions).

	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
June 30, 2020
U.S. Treasury, U.S. government corporations and agencies	$	3,441	$	76	$	—		$	3,517
Foreign governments		9,137		81		(12	)		9,206
Corporate bonds		5,499		440		(21	)		5,918
Other		497		74		(2	)		569
	$	18,574	$	671	$	(35	)	$	19,210
December 31, 2019
U.S. Treasury, U.S. government corporations and agencies	$	3,054	$	37	$	(1	)	$	3,090
Foreign governments		8,584		63		(9	)		8,638
Corporate bonds		5,896		459		(3	)		6,352
Other		539		67		(1	)		605
	$	18,073	$	626	$	(14	)	$	18,685

Schedule of amortized cost and estimated fair value of securities with fixed maturities

The amortized cost and estimated fair value of fixed maturity securities as of June 30, 2020 are summarized below by contractual maturity dates (in millions). Actual maturities may differ from contractual maturities due to early call or prepayment rights held by issuers.

	Due in one year or less		Due after one year through five years		Due after five years through ten years		Due after ten years		Mortgage- backed securities		Total
Amortized cost	$	8,632	$	8,894	$	283	$	401	$	364	$	18,574
Fair value		8,645		9,067		325		743		430		19,210