INVESTMENT SECURITIES (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment Securities

	September 30, 2020								December 31, 2019
(In millions)	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value		Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
Debt
U.S. corporate	$	23,649	$	6,090	$	(83)	$	29,656	$	23,037	$	4,636	$	(11)	$	27,661
Non-U.S. corporate	2,290		364		(2)		2,652		2,161		260		(1)		2,420
State and municipal	3,322		878		(18)		4,182		3,086		598		(15)		3,669
Mortgage and asset-backed	3,561		147		(100)		3,609		3,117		116		(4)		3,229
Government and agencies	1,266		198		—		1,464		1,391		126		—		1,516
Equity	5,318		—		—		5,318		10,025		—		—		10,025
Total	$	39,406	$	7,677	$	(202)	$	46,881	$	42,816	$	5,736	$	(31)	$	48,521

Contractual Maturities of Investment in Available-for-Sale Debt Securities (Excluding Mortgage and Asset-Backed Securities)

Contractual maturities of investments in debt securities (excluding mortgage and asset-backed securities) as of September 30, 2020 are due as follows:

(In millions)	Amortized cost		Estimated fair value
Within one year	$	673	$	684
After one year through five years	2,568		2,799
After five years through ten years	6,516		7,732
After ten years	20,771		26,739