CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 653	$ 704	$ 1,709	$ 2,107
Net unrealized (losses) gains on available-for-sale debt securities:
Unrealized holding losses arising during period	(2,129)	(281)	(5,564)	(748)
Reclassification adjustment for net (gains) losses included in net income	0	(1)	(2)	7
Net unrealized (losses) gains on cash flow hedge derivatives:
Unrealized holding (losses) gains arising during period	(530)	2	(840)	(53)
Reclassification adjustment for net gains included in net income	(3)	(58)	(109)	(173)
Defined benefit pension plans, net:
Net actuarial loss arising during the year	(1)	(1)	(2)	(2)
Reclassification of amounts to net periodic benefit costs	1	2	4	5
Other comprehensive loss, net of tax	(2,662)	(337)	(6,513)	(964)
Comprehensive (Loss) Income	$ (2,009)	$ 367	$ (4,804)	$ 1,143