INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment Securities

	June 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	$	23,540	$	5,771	$	(136	)	$	29,175	$	23,037	$	4,636	$	(11	)	$	27,661
Non-U.S. corporate	2,185		337		(5		)	2,517		2,161		260		(1		)	2,420
State and municipal	3,235		826		(22		)	4,039		3,086		598		(15		)	3,669
Mortgage and asset-backed	3,497		97		(136		)	3,458		3,117		116		(4		)	3,229
Government and agencies	1,257		206		—			1,463		1,391		126		—			1,516
Equity	6,465		—		—			6,465		10,025		—		—			10,025
Total	$	40,179	$	7,237	$	(300	)	$	47,117	$	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) at June 30, 2020 are due as follows:

(In millions)	Amortized cost		Estimated fair value
Within one year	$	643	$	657
After one year through five years	2,483		2,676
After five years through ten years	6,516		7,599
After ten years	20,575		26,261