CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 2,446	$ 2,770	$ 1,427
Net unrealized (losses) gains on available-for-sale debt securities:
Unrealized holding (losses) gains arising during the year	(5,478)	(1,043)	1,153
Reclassification adjustment for net (gains) losses included in net income	(2)	3	(34)
Net unrealized (losses) gains on cash flow hedge derivatives:
Unrealized holding (losses) gains arising during the year	(774)	(142)	483
Reclassification adjustment for net gains included in net income	(77)	(223)	(187)
Defined benefit pension plans, net:
Net actuarial gain (loss) arising during the year	9	4	(9)
Reclassification of amounts to net periodic benefit costs	5	7	7
Other	0	0	(4)
Other comprehensive (loss) income, net of tax	(6,317)	(1,394)	1,409
Comprehensive (Loss) Income	$ (3,871)	$ 1,376	$ 2,836